openslx-ng/printergui.git - Printer GUI for generic printing on remote printers and print servers

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#!/bin/sh
#
# qemu configure script (c) 2003 Fabrice Bellard
#

# Unset some variables known to interfere with behavior of common tools,
# just as autoconf does.
CLICOLOR_FORCE= GREP_OPTIONS=
unset CLICOLOR_FORCE GREP_OPTIONS

# Don't allow CCACHE, if present, to use cached results of compile tests!
export CCACHE_RECACHE=yes

# Temporary directory used for files created while
# configure runs. Since it is in the build directory
# we can safely blow away any previous version of it
# (and we need not jump through hoops to try to delete
# it when configure exits.)
TMPDIR1="config-temp"
rm -rf "${TMPDIR1}"
mkdir -p "${TMPDIR1}"
if [ $? -ne 0 ]; then
    echo "ERROR: failed to create temporary directory"
    exit 1
fi

TMPB="qemu-conf"
TMPC="${TMPDIR1}/${TMPB}.c"
TMPO="${TMPDIR1}/${TMPB}.o"
TMPCXX="${TMPDIR1}/${TMPB}.cxx"
TMPE="${TMPDIR1}/${TMPB}.exe"
TMPMO="${TMPDIR1}/${TMPB}.mo"
TMPTXT="${TMPDIR1}/${TMPB}.txt"

rm -f config.log

# Print a helpful header at the top of config.log
echo "# QEMU configure log $(date)" >> config.log
printf "# Configured with:" >> config.log
printf " '%s'" "$0" "$@" >> config.log
echo >> config.log
echo "#" >> config.log

print_error() {
    (echo
    echo "ERROR: $1"
    while test -n "$2"; do
        echo "       $2"
        shift
    done
    echo) >&2
}

error_exit() {
    print_error "$@"
    exit 1
}

do_compiler() {
    # Run the compiler, capturing its output to the log. First argument
    # is compiler binary to execute.
    local compiler="$1"
    shift
    if test -n "$BASH_VERSION"; then eval '
        echo >>config.log "
funcs: ${FUNCNAME[*]}
lines: ${BASH_LINENO[*]}"
    '; fi
    echo $compiler "$@" >> config.log
    $compiler "$@" >> config.log 2>&1 || return $?
    # Test passed. If this is an --enable-werror build, rerun
    # the test with -Werror and bail out if it fails. This
    # makes warning-generating-errors in configure test code
    # obvious to developers.
    if test "$werror" != "yes"; then
        return 0
    fi
    # Don't bother rerunning the compile if we were already using -Werror
    case "$*" in
        *-Werror*)
           return 0
        ;;
    esac
    echo $compiler -Werror "$@" >> config.log
    $compiler -Werror "$@" >> config.log 2>&1 && return $?
    error_exit "configure test passed without -Werror but failed with -Werror." \
        "This is probably a bug in the configure script. The failing command" \
        "will be at the bottom of config.log." \
        "You can run configure with --disable-werror to bypass this check."
}

do_cc() {
    do_compiler "$cc" "$@"
}

do_cxx() {
    do_compiler "$cxx" "$@"
}

update_cxxflags() {
    # Set QEMU_CXXFLAGS from QEMU_CFLAGS by filtering out those
    # options which some versions of GCC's C++ compiler complain about
    # because they only make sense for C programs.
    QEMU_CXXFLAGS="$QEMU_CXXFLAGS -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS"

    for arg in $QEMU_CFLAGS; do
        case $arg in
            -Wstrict-prototypes|-Wmissing-prototypes|-Wnested-externs|\
            -Wold-style-declaration|-Wold-style-definition|-Wredundant-decls)
                ;;
            -std=gnu99)
                QEMU_CXXFLAGS=${QEMU_CXXFLAGS:+$QEMU_CXXFLAGS }"-std=gnu++98"
                ;;
            *)
                QEMU_CXXFLAGS=${QEMU_CXXFLAGS:+$QEMU_CXXFLAGS }$arg
                ;;
        esac
    done
}

compile_object() {
  local_cflags="$1"
  do_cc $QEMU_CFLAGS $local_cflags -c -o $TMPO $TMPC
}

compile_prog() {
  local_cflags="$1"
  local_ldflags="$2"
  do_cc $QEMU_CFLAGS $local_cflags -o $TMPE $TMPC $LDFLAGS $local_ldflags
}

# symbolically link $1 to $2.  Portable version of "ln -sf".
symlink() {
  rm -rf "$2"
  mkdir -p "$(dirname "$2")"
  ln -s "$1" "$2"
}

# check whether a command is available to this shell (may be either an
# executable or a builtin)
has() {
    type "$1" >/dev/null 2>&1
}

# search for an executable in PATH
path_of() {
    local_command="$1"
    local_ifs="$IFS"
    local_dir=""

    # pathname has a dir component?
    if [ "${local_command#*/}" != "$local_command" ]; then
        if [ -x "$local_command" ] && [ ! -d "$local_command" ]; then
            echo "$local_command"
            return 0
        fi
    fi
    if [ -z "$local_command" ]; then
        return 1
    fi

    IFS=:
    for local_dir in $PATH; do
        if [ -x "$local_dir/$local_command" ] && [ ! -d "$local_dir/$local_command" ]; then
            echo "$local_dir/$local_command"
            IFS="${local_ifs:-$(printf ' \t\n')}"
            return 0
        fi
    done
    # not found
    IFS="${local_ifs:-$(printf ' \t\n')}"
    return 1
}

have_backend () {
    echo "$trace_backends" | grep "$1" >/dev/null
}

glob() {
    eval test -z '"${1#'"$2"'}"'
}

supported_hax_target() {
    test "$hax" = "yes" || return 1
    glob "$1" "*-softmmu" || return 1
    case "${1%-softmmu}" in
        i386|x86_64)
            return 0
        ;;
    esac
    return 1
}

supported_kvm_target() {
    test "$kvm" = "yes" || return 1
    glob "$1" "*-softmmu" || return 1
    case "${1%-softmmu}:$cpu" in
        arm:arm | aarch64:aarch64 | \
        i386:i386 | i386:x86_64 | i386:x32 | \
        x86_64:i386 | x86_64:x86_64 | x86_64:x32 | \
        mips:mips | mipsel:mips | \
        ppc:ppc | ppc64:ppc | ppc:ppc64 | ppc64:ppc64 | ppc64:ppc64le | \
        s390x:s390x)
            return 0
        ;;
    esac
    return 1
}

supported_xen_target() {
    test "$xen" = "yes" || return 1
    glob "$1" "*-softmmu" || return 1
    # Only i386 and x86_64 provide the xenpv machine.
    case "${1%-softmmu}" in
        i386|x86_64)
            return 0
        ;;
    esac
    return 1
}

supported_hvf_target() {
    test "$hvf" = "yes" || return 1
    glob "$1" "*-softmmu" || return 1
    case "${1%-softmmu}" in
        x86_64)
            return 0
        ;;
    esac
    return 1
}

supported_whpx_target() {
    test "$whpx" = "yes" || return 1
    glob "$1" "*-softmmu" || return 1
    case "${1%-softmmu}" in
        i386|x86_64)
            return 0
        ;;
    esac
    return 1
}

supported_target() {
    case "$1" in
        *-softmmu)
            ;;
        *-linux-user)
            if test "$linux" != "yes"; then
                print_error "Target '$target' is only available on a Linux host"
                return 1
            fi
            ;;
        *-bsd-user)
            if test "$bsd" != "yes"; then
                print_error "Target '$target' is only available on a BSD host"
                return 1
            fi
            ;;
        *)
            print_error "Invalid target name '$target'"
            return 1
            ;;
    esac
    test "$tcg" = "yes" && return 0
    supported_kvm_target "$1" && return 0
    supported_xen_target "$1" && return 0
    supported_hax_target "$1" && return 0
    supported_hvf_target "$1" && return 0
    supported_whpx_target "$1" && return 0
    print_error "TCG disabled, but hardware accelerator not available for '$target'"
    return 1
}


ld_has() {
    $ld --help 2>/dev/null | grep ".$1" >/dev/null 2>&1
}

# make source path absolute
source_path=$(cd "$(dirname -- "$0")"; pwd)

if printf %s\\n "$source_path" "$PWD" | grep -q "[[:space:]:]";
then
  error_exit "main directory cannot contain spaces nor colons"
fi

# default parameters
cpu=""
iasl="iasl"
interp_prefix="/usr/gnemul/qemu-%M"
static="no"
cross_prefix=""
audio_drv_list=""
block_drv_rw_whitelist=""
block_drv_ro_whitelist=""
host_cc="cc"
libs_cpu=""
libs_softmmu=""
libs_tools=""
audio_win_int=""
libs_qga=""
debug_info="yes"
stack_protector=""
use_containers="yes"

if test -e "$source_path/.git"
then
    git_update=yes
    git_submodules="ui/keycodemapdb"
    git_submodules="$git_submodules tests/fp/berkeley-testfloat-3"
    git_submodules="$git_submodules tests/fp/berkeley-softfloat-3"
else
    git_update=no
    git_submodules=""

    if ! test -f "$source_path/ui/keycodemapdb/README"
    then
        echo
        echo "ERROR: missing file $source_path/ui/keycodemapdb/README"
        echo
        echo "This is not a GIT checkout but module content appears to"
        echo "be missing. Do not use 'git archive' or GitHub download links"
        echo "to acquire QEMU source archives. Non-GIT builds are only"
        echo "supported with source archives linked from:"
        echo
        echo "  https://www.qemu.org/download/#source"
        echo
        echo "Developers working with GIT can use scripts/archive-source.sh"
        echo "if they need to create valid source archives."
        echo
        exit 1
    fi
fi
git="git"

# Don't accept a target_list environment variable.
unset target_list
unset target_list_exclude

# Default value for a variable defining feature "foo".
#  * foo="no"  feature will only be used if --enable-foo arg is given
#  * foo=""    feature will be searched for, and if found, will be used
#              unless --disable-foo is given
#  * foo="yes" this value will only be set by --enable-foo flag.
#              feature will searched for,
#              if not found, configure exits with error
#
# Always add --enable-foo and --disable-foo command line args.
# Distributions want to ensure that several features are compiled in, and it
# is impossible without a --enable-foo that exits if a feature is not found.

brlapi=""
curl=""
curses=""
docs=""
fdt=""
netmap="no"
sdl=""
sdl_image=""
virtfs=""
mpath=""
vnc="yes"
sparse="no"
vde=""
vnc_sasl=""
vnc_jpeg=""
vnc_png=""
xkbcommon=""
xen=""
xen_ctrl_version=""
xen_pci_passthrough=""
linux_aio=""
cap_ng=""
attr=""
libattr=""
xfs=""
tcg="yes"
membarrier=""
vhost_net=""
vhost_crypto=""
vhost_scsi=""
vhost_vsock=""
vhost_user=""
vhost_user_fs=""
kvm="no"
hax="no"
hvf="no"
whpx="no"
rdma=""
pvrdma=""
gprof="no"
debug_tcg="no"
debug="no"
sanitizers="no"
fortify_source=""
strip_opt="yes"
tcg_interpreter="no"
bigendian="no"
mingw32="no"
gcov="no"
gcov_tool="gcov"
EXESUF=""
DSOSUF=".so"
LDFLAGS_SHARED="-shared"
modules="no"
prefix="/usr/local"
mandir="\${prefix}/share/man"
datadir="\${prefix}/share"
firmwarepath="\${prefix}/share/qemu-firmware"
qemu_docdir="\${prefix}/share/doc/qemu"
bindir="\${prefix}/bin"
libdir="\${prefix}/lib"
libexecdir="\${prefix}/libexec"
includedir="\${prefix}/include"
sysconfdir="\${prefix}/etc"
local_statedir="\${prefix}/var"
confsuffix="/qemu"
slirp=""
oss_lib=""
bsd="no"
linux="no"
solaris="no"
profiler="no"
cocoa="no"
softmmu="yes"
linux_user="no"
bsd_user="no"
blobs="yes"
edk2_blobs="no"
pkgversion=""
pie=""
qom_cast_debug="yes"
trace_backends="log"
trace_file="trace"
spice=""
rbd=""
smartcard=""
libusb=""
usb_redir=""
opengl=""
opengl_dmabuf="no"
cpuid_h="no"
avx2_opt=""
zlib="yes"
capstone=""
lzo=""
snappy=""
bzip2=""
lzfse=""
guest_agent=""
guest_agent_with_vss="no"
guest_agent_ntddscsi="no"
guest_agent_msi=""
vss_win32_sdk=""
win_sdk="no"
want_tools="yes"
libiscsi=""
libnfs=""
coroutine=""
coroutine_pool=""
debug_stack_usage="no"
crypto_afalg="no"
seccomp=""
glusterfs=""
glusterfs_xlator_opt="no"
glusterfs_discard="no"
glusterfs_fallocate="no"
glusterfs_zerofill="no"
glusterfs_ftruncate_has_stat="no"
glusterfs_iocb_has_stat="no"
gtk=""
gtk_gl="no"
tls_priority="NORMAL"
gnutls=""
nettle=""
nettle_xts="no"
gcrypt=""
gcrypt_hmac="no"
gcrypt_xts="no"
qemu_private_xts="yes"
auth_pam=""
vte=""
virglrenderer=""
tpm=""
libssh=""
live_block_migration="yes"
numa=""
tcmalloc="no"
jemalloc="no"
replication="yes"
vxhs=""
bochs="yes"
cloop="yes"
dmg="yes"
qcow1="yes"
vdi="yes"
vvfat="yes"
qed="yes"
parallels="yes"
sheepdog="yes"
libxml2=""
debug_mutex="no"
libpmem=""
default_devices="yes"
plugins="no"

supported_cpu="no"
supported_os="no"
bogus_os="no"
malloc_trim=""

# parse CC options first
for opt do
  optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)')
  case "$opt" in
  --cross-prefix=*) cross_prefix="$optarg"
  ;;
  --cc=*) CC="$optarg"
  ;;
  --cxx=*) CXX="$optarg"
  ;;
  --cpu=*) cpu="$optarg"
  ;;
  --extra-cflags=*) QEMU_CFLAGS="$QEMU_CFLAGS $optarg"
  ;;
  --extra-cxxflags=*) QEMU_CXXFLAGS="$QEMU_CXXFLAGS $optarg"
  ;;
  --extra-ldflags=*) LDFLAGS="$LDFLAGS $optarg"
                     EXTRA_LDFLAGS="$optarg"
  ;;
  --enable-debug-info) debug_info="yes"
  ;;
  --disable-debug-info) debug_info="no"
  ;;
  --cross-cc-*[!a-zA-Z0-9_-]*=*) error_exit "Passed bad --cross-cc-FOO option"
  ;;
  --cross-cc-cflags-*) cc_arch=${opt#--cross-cc-flags-}; cc_arch=${cc_arch%%=*}
                      eval "cross_cc_cflags_${cc_arch}=\$optarg"
                      cross_cc_vars="$cross_cc_vars cross_cc_cflags_${cc_arch}"
  ;;
  --cross-cc-*) cc_arch=${opt#--cross-cc-}; cc_arch=${cc_arch%%=*}
                cc_archs="$cc_archs $cc_arch"
                eval "cross_cc_${cc_arch}=\$optarg"
                cross_cc_vars="$cross_cc_vars cross_cc_${cc_arch}"
  ;;
  esac
done
# OS specific
# Using uname is really, really broken.  Once we have the right set of checks
# we can eliminate its usage altogether.

# Preferred compiler:
#  ${CC} (if set)
#  ${cross_prefix}gcc (if cross-prefix specified)
#  system compiler
if test -z "${CC}${cross_prefix}"; then
  cc="$host_cc"
else
  cc="${CC-${cross_prefix}gcc}"
fi

if test -z "${CXX}${cross_prefix}"; then
  cxx="c++"
else
  cxx="${CXX-${cross_prefix}g++}"
fi

ar="${AR-${cross_prefix}ar}"
as="${AS-${cross_prefix}as}"
ccas="${CCAS-$cc}"
cpp="${CPP-$cc -E}"
objcopy="${OBJCOPY-${cross_prefix}objcopy}"
ld="${LD-${cross_prefix}ld}"
ranlib="${RANLIB-${cross_prefix}ranlib}"
nm="${NM-${cross_prefix}nm}"
strip="${STRIP-${cross_prefix}strip}"
windres="${WINDRES-${cross_prefix}windres}"
pkg_config_exe="${PKG_CONFIG-${cross_prefix}pkg-config}"
query_pkg_config() {
    "${pkg_config_exe}" ${QEMU_PKG_CONFIG_FLAGS} "$@"
}
pkg_config=query_pkg_config
sdl2_config="${SDL2_CONFIG-${cross_prefix}sdl2-config}"

# If the user hasn't specified ARFLAGS, default to 'rv', just as make does.
ARFLAGS="${ARFLAGS-rv}"

# default flags for all hosts
# We use -fwrapv to tell the compiler that we require a C dialect where
# left shift of signed integers is well defined and has the expected
# 2s-complement style results. (Both clang and gcc agree that it
# provides these semantics.)
QEMU_CFLAGS="-fno-strict-aliasing -fno-common -fwrapv -std=gnu99 $QEMU_CFLAGS"
QEMU_CFLAGS="-Wall -Wundef -Wwrite-strings -Wmissing-prototypes $QEMU_CFLAGS"
QEMU_CFLAGS="-Wstrict-prototypes -Wredundant-decls $QEMU_CFLAGS"
QEMU_CFLAGS="-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE $QEMU_CFLAGS"
QEMU_INCLUDES="-iquote . -iquote \$(SRC_PATH) -iquote \$(SRC_PATH)/accel/tcg -iquote \$(SRC_PATH)/include"
QEMU_INCLUDES="$QEMU_INCLUDES -iquote \$(SRC_PATH)/disas/libvixl"
if test "$debug_info" = "yes"; then
    CFLAGS="-g $CFLAGS"
    LDFLAGS="-g $LDFLAGS"
fi

# running configure in the source tree?
# we know that's the case if configure is there.
if test -f "./configure"; then
    pwd_is_source_path="y"
else
    pwd_is_source_path="n"
fi

check_define() {
cat > $TMPC <<EOF
#if !defined($1)
#error $1 not defined
#endif
int main(void) { return 0; }
EOF
  compile_object
}

check_include() {
cat > $TMPC <<EOF
#include <$1>
int main(void) { return 0; }
EOF
  compile_object
}

write_c_skeleton() {
    cat > $TMPC <<EOF
int main(void) { return 0; }
EOF
}

if check_define __linux__ ; then
  targetos="Linux"
elif check_define _WIN32 ; then
  targetos='MINGW32'
elif check_define __OpenBSD__ ; then
  targetos='OpenBSD'
elif check_define __sun__ ; then
  targetos='SunOS'
elif check_define __HAIKU__ ; then
  targetos='Haiku'
elif check_define __FreeBSD__ ; then
  targetos='FreeBSD'
elif check_define __FreeBSD_kernel__ && check_define __GLIBC__; then
  targetos='GNU/kFreeBSD'
elif check_define __DragonFly__ ; then
  targetos='DragonFly'
elif check_define __NetBSD__; then
  targetos='NetBSD'
elif check_define __APPLE__; then
  targetos='Darwin'
else
  # This is a fatal error, but don't report it yet, because we
  # might be going to just print the --help text, or it might
  # be the result of a missing compiler.
  targetos='bogus'
  bogus_os='yes'
fi

# Some host OSes need non-standard checks for which CPU to use.
# Note that these checks are broken for cross-compilation: if you're
# cross-compiling to one of these OSes then you'll need to specify
# the correct CPU with the --cpu option.
case $targetos in
Darwin)
  # on Leopard most of the system is 32-bit, so we have to ask the kernel if we can
  # run 64-bit userspace code.
  # If the user didn't specify a CPU explicitly and the kernel says this is
  # 64 bit hw, then assume x86_64. Otherwise fall through to the usual detection code.
  if test -z "$cpu" && test "$(sysctl -n hw.optional.x86_64)" = "1"; then
    cpu="x86_64"
  fi
  ;;
SunOS)
  # $(uname -m) returns i86pc even on an x86_64 box, so default based on isainfo
  if test -z "$cpu" && test "$(isainfo -k)" = "amd64"; then
    cpu="x86_64"
  fi
esac

if test ! -z "$cpu" ; then
  # command line argument
  :
elif check_define __i386__ ; then
  cpu="i386"
elif check_define __x86_64__ ; then
  if check_define __ILP32__ ; then
    cpu="x32"
  else
    cpu="x86_64"
  fi
elif check_define __sparc__ ; then
  if check_define __arch64__ ; then
    cpu="sparc64"
  else
    cpu="sparc"
  fi
elif check_define _ARCH_PPC ; then
  if check_define _ARCH_PPC64 ; then
    if check_define _LITTLE_ENDIAN ; then
      cpu="ppc64le"
    else
      cpu="ppc64"
    fi
  else
    cpu="ppc"
  fi
elif check_define __mips__ ; then
  cpu="mips"
elif check_define __s390__ ; then
  if check_define __s390x__ ; then
    cpu="s390x"
  else
    cpu="s390"
  fi
elif check_define __riscv ; then
  if check_define _LP64 ; then
    cpu="riscv64"
  else
    cpu="riscv32"
  fi
elif check_define __arm__ ; then
  cpu="arm"
elif check_define __aarch64__ ; then
  cpu="aarch64"
else
  cpu=$(uname -m)
fi

ARCH=
# Normalise host CPU name and set ARCH.
# Note that this case should only have supported host CPUs, not guests.
case "$cpu" in
  ppc|ppc64|s390x|sparc64|x32|riscv32|riscv64)
    supported_cpu="yes"
  ;;
  ppc64le)
    ARCH="ppc64"
    supported_cpu="yes"
  ;;
  i386|i486|i586|i686|i86pc|BePC)
    cpu="i386"
    supported_cpu="yes"
  ;;
  x86_64|amd64)
    cpu="x86_64"
    supported_cpu="yes"
  ;;
  armv*b|armv*l|arm)
    cpu="arm"
    supported_cpu="yes"
  ;;
  aarch64)
    cpu="aarch64"
    supported_cpu="yes"
  ;;
  mips*)
    cpu="mips"
    supported_cpu="yes"
  ;;
  sparc|sun4[cdmuv])
    cpu="sparc"
    supported_cpu="yes"
  ;;
  *)
    # This will result in either an error or falling back to TCI later
    ARCH=unknown
  ;;
esac
if test -z "$ARCH"; then
  ARCH="$cpu"
fi

# OS specific

# host *BSD for user mode
HOST_VARIANT_DIR=""

case $targetos in
MINGW32*)
  mingw32="yes"
  hax="yes"
  vhost_user="no"
  audio_possible_drivers="dsound sdl"
  if check_include dsound.h; then
    audio_drv_list="dsound"
  else
    audio_drv_list=""
  fi
  supported_os="yes"
;;
GNU/kFreeBSD)
  bsd="yes"
  audio_drv_list="oss try-sdl"
  audio_possible_drivers="oss sdl pa"
;;
FreeBSD)
  bsd="yes"
  make="${MAKE-gmake}"
  audio_drv_list="oss try-sdl"
  audio_possible_drivers="oss sdl pa"
  # needed for kinfo_getvmmap(3) in libutil.h
  LIBS="-lutil $LIBS"
  # needed for kinfo_getproc
  libs_qga="-lutil $libs_qga"
  netmap=""  # enable netmap autodetect
  HOST_VARIANT_DIR="freebsd"
  supported_os="yes"
;;
DragonFly)
  bsd="yes"
  make="${MAKE-gmake}"
  audio_drv_list="oss try-sdl"
  audio_possible_drivers="oss sdl pa"
  HOST_VARIANT_DIR="dragonfly"
;;
NetBSD)
  bsd="yes"
  hax="yes"
  make="${MAKE-gmake}"
  audio_drv_list="oss try-sdl"
  audio_possible_drivers="oss sdl"
  oss_lib="-lossaudio"
  HOST_VARIANT_DIR="netbsd"
  supported_os="yes"
;;
OpenBSD)
  bsd="yes"
  make="${MAKE-gmake}"
  audio_drv_list="try-sdl"
  audio_possible_drivers="sdl"
  HOST_VARIANT_DIR="openbsd"
  supported_os="yes"
;;
Darwin)
  bsd="yes"
  darwin="yes"
  hax="yes"
  hvf="yes"
  LDFLAGS_SHARED="-bundle -undefined dynamic_lookup"
  if [ "$cpu" = "x86_64" ] ; then
    QEMU_CFLAGS="-arch x86_64 $QEMU_CFLAGS"
    LDFLAGS="-arch x86_64 $LDFLAGS"
  fi
  cocoa="yes"
  audio_drv_list="coreaudio try-sdl"
  audio_possible_drivers="coreaudio sdl"
  LDFLAGS="-framework CoreFoundation -framework IOKit $LDFLAGS"
  libs_softmmu="-F/System/Library/Frameworks -framework Cocoa -framework IOKit $libs_softmmu"
  # Disable attempts to use ObjectiveC features in os/object.h since they
  # won't work when we're compiling with gcc as a C compiler.
  QEMU_CFLAGS="-DOS_OBJECT_USE_OBJC=0 $QEMU_CFLAGS"
  HOST_VARIANT_DIR="darwin"
  supported_os="yes"
;;
SunOS)
  solaris="yes"
  make="${MAKE-gmake}"
  install="${INSTALL-ginstall}"
  smbd="${SMBD-/usr/sfw/sbin/smbd}"
  if test -f /usr/include/sys/soundcard.h ; then
    audio_drv_list="oss try-sdl"
  fi
  audio_possible_drivers="oss sdl"
# needed for CMSG_ macros in sys/socket.h
  QEMU_CFLAGS="-D_XOPEN_SOURCE=600 $QEMU_CFLAGS"
# needed for TIOCWIN* defines in termios.h
  QEMU_CFLAGS="-D__EXTENSIONS__ $QEMU_CFLAGS"
  QEMU_CFLAGS="-std=gnu99 $QEMU_CFLAGS"
  solarisnetlibs="-lsocket -lnsl -lresolv"
  LIBS="$solarisnetlibs $LIBS"
  libs_qga="$solarisnetlibs $libs_qga"
;;
Haiku)
  haiku="yes"
  QEMU_CFLAGS="-DB_USE_POSITIVE_POSIX_ERRORS $QEMU_CFLAGS"
  LIBS="-lposix_error_mapper -lnetwork $LIBS"
;;
Linux)
  audio_drv_list="try-pa oss"
  audio_possible_drivers="oss alsa sdl pa"
  linux="yes"
  linux_user="yes"
  kvm="yes"
  QEMU_INCLUDES="-I\$(SRC_PATH)/linux-headers -I$PWD/linux-headers $QEMU_INCLUDES"
  supported_os="yes"
  libudev="yes"
;;
esac

if [ "$bsd" = "yes" ] ; then
  if [ "$darwin" != "yes" ] ; then
    bsd_user="yes"
  fi
fi

: ${make=${MAKE-make}}
: ${install=${INSTALL-install}}
# We prefer python 3.x. A bare 'python' is traditionally
# python 2.x, but some distros have it as python 3.x, so
# we check that too
python=
for binary in "${PYTHON-python3}" python
do
    if has "$binary"
    then
        python=$(command -v "$binary")
        break
    fi
done
: ${smbd=${SMBD-/usr/sbin/smbd}}

# Default objcc to clang if available, otherwise use CC
if has clang; then
  objcc=clang
else
  objcc="$cc"
fi

if test "$mingw32" = "yes" ; then
  EXESUF=".exe"
  DSOSUF=".dll"
  # MinGW needs -mthreads for TLS and macro _MT.
  QEMU_CFLAGS="-mthreads $QEMU_CFLAGS"
  LIBS="-lwinmm -lws2_32 $LIBS"
  write_c_skeleton;
  if compile_prog "" "-liberty" ; then
    LIBS="-liberty $LIBS"
  fi
  prefix="c:/Program Files/QEMU"
  mandir="\${prefix}"
  datadir="\${prefix}"
  qemu_docdir="\${prefix}"
  bindir="\${prefix}"
  sysconfdir="\${prefix}"
  local_statedir=
  confsuffix=""
  libs_qga="-lws2_32 -lwinmm -lpowrprof -lwtsapi32 -lwininet -liphlpapi -lnetapi32 $libs_qga"
fi

werror=""

for opt do
  optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)')
  case "$opt" in
  --help|-h) show_help=yes
  ;;
  --version|-V) exec cat $source_path/VERSION
  ;;
  --prefix=*) prefix="$optarg"
  ;;
  --interp-prefix=*) interp_prefix="$optarg"
  ;;
  --cross-prefix=*)
  ;;
  --cc=*)
  ;;
  --host-cc=*) host_cc="$optarg"
  ;;
  --cxx=*)
  ;;
  --iasl=*) iasl="$optarg"
  ;;
  --objcc=*) objcc="$optarg"
  ;;
  --make=*) make="$optarg"
  ;;
  --install=*) install="$optarg"
  ;;
  --python=*) python="$optarg"
  ;;
  --gcov=*) gcov_tool="$optarg"
  ;;
  --smbd=*) smbd="$optarg"
  ;;
  --extra-cflags=*)
  ;;
  --extra-cxxflags=*)
  ;;
  --extra-ldflags=*)
  ;;
  --enable-debug-info)
  ;;
  --disable-debug-info)
  ;;
  --cross-cc-*)
  ;;
  --enable-modules)
      modules="yes"
  ;;
  --disable-modules)
      modules="no"
  ;;
  --cpu=*)
  ;;
  --target-list=*) target_list="$optarg"
                   if test "$target_list_exclude"; then
                       error_exit "Can't mix --target-list with --target-list-exclude"
                   fi
  ;;
  --target-list-exclude=*) target_list_exclude="$optarg"
                   if test "$target_list"; then
                       error_exit "Can't mix --target-list-exclude with --target-list"
                   fi
  ;;
  --enable-trace-backends=*) trace_backends="$optarg"
  ;;
  # XXX: backwards compatibility
  --enable-trace-backend=*) trace_backends="$optarg"
  ;;
  --with-trace-file=*) trace_file="$optarg"
  ;;
  --with-default-devices) default_devices="yes"
  ;;
  --without-default-devices) default_devices="no"
  ;;
  --enable-gprof) gprof="yes"
  ;;
  --enable-gcov) gcov="yes"
  ;;
  --static)
    static="yes"
    LDFLAGS="-static $LDFLAGS"
    QEMU_PKG_CONFIG_FLAGS="--static $QEMU_PKG_CONFIG_FLAGS"
  ;;
  --mandir=*) mandir="$optarg"
  ;;
  --bindir=*) bindir="$optarg"
  ;;
  --libdir=*) libdir="$optarg"
  ;;
  --libexecdir=*) libexecdir="$optarg"
  ;;
  --includedir=*) includedir="$optarg"
  ;;
  --datadir=*) datadir="$optarg"
  ;;
  --with-confsuffix=*) confsuffix="$optarg"
  ;;
  --docdir=*) qemu_docdir="$optarg"
  ;;
  --sysconfdir=*) sysconfdir="$optarg"
  ;;
  --localstatedir=*) local_statedir="$optarg"
  ;;
  --firmwarepath=*) firmwarepath="$optarg"
  ;;
  --host=*|--build=*|\
  --disable-dependency-tracking|\
  --sbindir=*|--sharedstatedir=*|\
  --oldincludedir=*|--datarootdir=*|--infodir=*|--localedir=*|\
  --htmldir=*|--dvidir=*|--pdfdir=*|--psdir=*)
    # These switches are silently ignored, for compatibility with
    # autoconf-generated configure scripts. This allows QEMU's
    # configure to be used by RPM and similar macros that set
    # lots of directory switches by default.
  ;;
  --disable-sdl) sdl="no"
  ;;
  --enable-sdl) sdl="yes"
  ;;
  --disable-sdl-image) sdl_image="no"
  ;;
  --enable-sdl-image) sdl_image="yes"
  ;;
  --disable-qom-cast-debug) qom_cast_debug="no"
  ;;
  --enable-qom-cast-debug) qom_cast_debug="yes"
  ;;
  --disable-virtfs) virtfs="no"
  ;;
  --enable-virtfs) virtfs="yes"
  ;;
  --disable-mpath) mpath="no"
  ;;
  --enable-mpath) mpath="yes"
  ;;
  --disable-vnc) vnc="no"
  ;;
  --enable-vnc) vnc="yes"
  ;;
  --oss-lib=*) oss_lib="$optarg"
  ;;
  --audio-drv-list=*) audio_drv_list="$optarg"
  ;;
  --block-drv-rw-whitelist=*|--block-drv-whitelist=*) block_drv_rw_whitelist=$(echo "$optarg" | sed -e 's/,/ /g')
  ;;
  --block-drv-ro-whitelist=*) block_drv_ro_whitelist=$(echo "$optarg" | sed -e 's/,/ /g')
  ;;
  --enable-debug-tcg) debug_tcg="yes"
  ;;
  --disable-debug-tcg) debug_tcg="no"
  ;;
  --enable-debug)
      # Enable debugging options that aren't excessively noisy
      debug_tcg="yes"
      debug_mutex="yes"
      debug="yes"
      strip_opt="no"
      fortify_source="no"
  ;;
  --enable-sanitizers) sanitizers="yes"
  ;;
  --disable-sanitizers) sanitizers="no"
  ;;
  --enable-sparse) sparse="yes"
  ;;
  --disable-sparse) sparse="no"
  ;;
  --disable-strip) strip_opt="no"
  ;;
  --disable-vnc-sasl) vnc_sasl="no"
  ;;
  --enable-vnc-sasl) vnc_sasl="yes"
  ;;
  --disable-vnc-jpeg) vnc_jpeg="no"
  ;;
  --enable-vnc-jpeg) vnc_jpeg="yes"
  ;;
  --disable-vnc-png) vnc_png="no"
  ;;
  --enable-vnc-png) vnc_png="yes"
  ;;
  --disable-slirp) slirp="no"
  ;;
  --enable-slirp=git) slirp="git"
  ;;
  --enable-slirp=system) slirp="system"
  ;;
  --disable-vde) vde="no"
  ;;
  --enable-vde) vde="yes"
  ;;
  --disable-netmap) netmap="no"
  ;;
  --enable-netmap) netmap="yes"
  ;;
  --disable-xen) xen="no"
  ;;
  --enable-xen) xen="yes"
  ;;
  --disable-xen-pci-passthrough) xen_pci_passthrough="no"
  ;;
  --enable-xen-pci-passthrough) xen_pci_passthrough="yes"
  ;;
  --disable-brlapi) brlapi="no"
  ;;
  --enable-brlapi) brlapi="yes"
  ;;
  --disable-kvm) kvm="no"
  ;;
  --enable-kvm) kvm="yes"
  ;;
  --disable-hax) hax="no"
  ;;
  --enable-hax) hax="yes"
  ;;
  --disable-hvf) hvf="no"
  ;;
  --enable-hvf) hvf="yes"
  ;;
  --disable-whpx) whpx="no"
  ;;
  --enable-whpx) whpx="yes"
  ;;
  --disable-tcg-interpreter) tcg_interpreter="no"
  ;;
  --enable-tcg-interpreter) tcg_interpreter="yes"
  ;;
  --disable-cap-ng)  cap_ng="no"
  ;;
  --enable-cap-ng) cap_ng="yes"
  ;;
  --disable-tcg) tcg="no"
  ;;
  --enable-tcg) tcg="yes"
  ;;
  --disable-malloc-trim) malloc_trim="no"
  ;;
  --enable-malloc-trim) malloc_trim="yes"
  ;;
  --disable-spice) spice="no"
  ;;
  --enable-spice) spice="yes"
  ;;
  --disable-libiscsi) libiscsi="no"
  ;;
  --enable-libiscsi) libiscsi="yes"
  ;;
  --disable-libnfs) libnfs="no"
  ;;
  --enable-libnfs) libnfs="yes"
  ;;
  --enable-profiler) profiler="yes"
  ;;
  --disable-cocoa) cocoa="no"
  ;;
  --enable-cocoa)
      cocoa="yes" ;
      audio_drv_list="coreaudio $(echo $audio_drv_list | sed s,coreaudio,,g)"
  ;;
  --disable-system) softmmu="no"
  ;;
  --enable-system) softmmu="yes"
  ;;
  --disable-user)
      linux_user="no" ;
      bsd_user="no" ;
  ;;
  --enable-user) ;;
  --disable-linux-user) linux_user="no"
  ;;
  --enable-linux-user) linux_user="yes"
  ;;
  --disable-bsd-user) bsd_user="no"
  ;;
  --enable-bsd-user) bsd_user="yes"
  ;;
  --enable-pie) pie="yes"
  ;;
  --disable-pie) pie="no"
  ;;
  --enable-werror) werror="yes"
  ;;
  --disable-werror) werror="no"
  ;;
  --enable-stack-protector) stack_protector="yes"
  ;;
  --disable-stack-protector) stack_protector="no"
  ;;
  --disable-curses) curses="no"
  ;;
  --enable-curses) curses="yes"
  ;;
  --disable-iconv) iconv="no"
  ;;
  --enable-iconv) iconv="yes"
  ;;
  --disable-curl) curl="no"
  ;;
  --enable-curl) curl="yes"
  ;;
  --disable-fdt) fdt="no"
  ;;
  --enable-fdt) fdt="yes"
  ;;
  --disable-linux-aio) linux_aio="no"
  ;;
  --enable-linux-aio) linux_aio="yes"
  ;;
  --disable-attr) attr="no"
  ;;
  --enable-attr) attr="yes"
  ;;
  --disable-membarrier) membarrier="no"
  ;;
  --enable-membarrier) membarrier="yes"
  ;;
  --disable-blobs) blobs="no"
  ;;
  --with-pkgversion=*) pkgversion="$optarg"
  ;;
  --with-coroutine=*) coroutine="$optarg"
  ;;
  --disable-coroutine-pool) coroutine_pool="no"
  ;;
  --enable-coroutine-pool) coroutine_pool="yes"
  ;;
  --enable-debug-stack-usage) debug_stack_usage="yes"
  ;;
  --enable-crypto-afalg) crypto_afalg="yes"
  ;;
  --disable-crypto-afalg) crypto_afalg="no"
  ;;
  --disable-docs) docs="no"
  ;;
  --enable-docs) docs="yes"
  ;;
  --disable-vhost-net) vhost_net="no"
  ;;
  --enable-vhost-net) vhost_net="yes"
  ;;
  --disable-vhost-crypto) vhost_crypto="no"
  ;;
  --enable-vhost-crypto) vhost_crypto="yes"
  ;;
  --disable-vhost-scsi) vhost_scsi="no"
  ;;
  --enable-vhost-scsi) vhost_scsi="yes"
  ;;
  --disable-vhost-vsock) vhost_vsock="no"
  ;;
  --enable-vhost-vsock) vhost_vsock="yes"
  ;;
  --disable-vhost-user-fs) vhost_user_fs="no"
  ;;
  --enable-vhost-user-fs) vhost_user_fs="yes"
  ;;
  --disable-opengl) opengl="no"
  ;;
  --enable-opengl) opengl="yes"
  ;;
  --disable-rbd) rbd="no"
  ;;
  --enable-rbd) rbd="yes"
  ;;
  --disable-xfsctl) xfs="no"
  ;;
  --enable-xfsctl) xfs="yes"
  ;;
  --disable-smartcard) smartcard="no"
  ;;
  --enable-smartcard) smartcard="yes"
  ;;
  --disable-libusb) libusb="no"
  ;;
  --enable-libusb) libusb="yes"
  ;;
  --disable-usb-redir) usb_redir="no"
  ;;
  --enable-usb-redir) usb_redir="yes"
  ;;
  --disable-zlib-test) zlib="no"
  ;;
  --disable-lzo) lzo="no"
  ;;
  --enable-lzo) lzo="yes"
  ;;
  --disable-snappy) snappy="no"
  ;;
  --enable-snappy) snappy="yes"
  ;;
  --disable-bzip2) bzip2="no"
  ;;
  --enable-bzip2) bzip2="yes"
  ;;
  --enable-lzfse) lzfse="yes"
  ;;
  --disable-lzfse) lzfse="no"
  ;;
  --enable-guest-agent) guest_agent="yes"
  ;;
  --disable-guest-agent) guest_agent="no"
  ;;
  --enable-guest-agent-msi) guest_agent_msi="yes"
  ;;
  --disable-guest-agent-msi) guest_agent_msi="no"
  ;;
  --with-vss-sdk) vss_win32_sdk=""
  ;;
  --with-vss-sdk=*) vss_win32_sdk="$optarg"
  ;;
  --without-vss-sdk) vss_win32_sdk="no"
  ;;
  --with-win-sdk) win_sdk=""
  ;;
  --with-win-sdk=*) win_sdk="$optarg"
  ;;
  --without-win-sdk) win_sdk="no"
  ;;
  --enable-tools) want_tools="yes"
  ;;
  --disable-tools) want_tools="no"
  ;;
  --enable-seccomp) seccomp="yes"
  ;;
  --disable-seccomp) seccomp="no"
  ;;
  --disable-glusterfs) glusterfs="no"
  ;;
  --disable-avx2) avx2_opt="no"
  ;;
  --enable-avx2) avx2_opt="yes"
  ;;
  --enable-glusterfs) glusterfs="yes"
  ;;
  --disable-virtio-blk-data-plane|--enable-virtio-blk-data-plane)
      echo "$0: $opt is obsolete, virtio-blk data-plane is always on" >&2
  ;;
  --enable-vhdx|--disable-vhdx)
      echo "$0: $opt is obsolete, VHDX driver is always built" >&2
  ;;
  --enable-uuid|--disable-uuid)
      echo "$0: $opt is obsolete, UUID support is always built" >&2
  ;;
  --disable-gtk) gtk="no"
  ;;
  --enable-gtk) gtk="yes"
  ;;
  --tls-priority=*) tls_priority="$optarg"
  ;;
  --disable-gnutls) gnutls="no"
  ;;
  --enable-gnutls) gnutls="yes"
  ;;
  --disable-nettle) nettle="no"
  ;;
  --enable-nettle) nettle="yes"
  ;;
  --disable-gcrypt) gcrypt="no"
  ;;
  --enable-gcrypt) gcrypt="yes"
  ;;
  --disable-auth-pam) auth_pam="no"
  ;;
  --enable-auth-pam) auth_pam="yes"
  ;;
  --enable-rdma) rdma="yes"
  ;;
  --disable-rdma) rdma="no"
  ;;
  --enable-pvrdma) pvrdma="yes"
  ;;
  --disable-pvrdma) pvrdma="no"
  ;;
  --disable-vte) vte="no"
  ;;
  --enable-vte) vte="yes"
  ;;
  --disable-virglrenderer) virglrenderer="no"
  ;;
  --enable-virglrenderer) virglrenderer="yes"
  ;;
  --disable-tpm) tpm="no"
  ;;
  --enable-tpm) tpm="yes"
  ;;
  --disable-libssh) libssh="no"
  ;;
  --enable-libssh) libssh="yes"
  ;;
  --disable-live-block-migration) live_block_migration="no"
  ;;
  --enable-live-block-migration) live_block_migration="yes"
  ;;
  --disable-numa) numa="no"
  ;;
  --enable-numa) numa="yes"
  ;;
  --disable-libxml2) libxml2="no"
  ;;
  --enable-libxml2) libxml2="yes"
  ;;
  --disable-tcmalloc) tcmalloc="no"
  ;;
  --enable-tcmalloc) tcmalloc="yes"
  ;;
  --disable-jemalloc) jemalloc="no"
  ;;
  --enable-jemalloc) jemalloc="yes"
  ;;
  --disable-replication) replication="no"
  ;;
  --enable-replication) replication="yes"
  ;;
  --disable-vxhs) vxhs="no"
  ;;
  --enable-vxhs) vxhs="yes"
  ;;
  --disable-bochs) bochs="no"
  ;;
  --enable-bochs) bochs="yes"
  ;;
  --disable-cloop) cloop="no"
  ;;
  --enable-cloop) cloop="yes"
  ;;
  --disable-dmg) dmg="no"
  ;;
  --enable-dmg) dmg="yes"
  ;;
  --disable-qcow1) qcow1="no"
  ;;
  --enable-qcow1) qcow1="yes"
  ;;
  --disable-vdi) vdi="no"
  ;;
  --enable-vdi) vdi="yes"
  ;;
  --disable-vvfat) vvfat="no"
  ;;
  --enable-vvfat) vvfat="yes"
  ;;
  --disable-qed) qed="no"
  ;;
  --enable-qed) qed="yes"
  ;;
  --disable-parallels) parallels="no"
  ;;
  --enable-parallels) parallels="yes"
  ;;
  --disable-sheepdog) sheepdog="no"
  ;;
  --enable-sheepdog) sheepdog="yes"
  ;;
  --disable-vhost-user) vhost_user="no"
  ;;
  --enable-vhost-user) vhost_user="yes"
  ;;
  --disable-vhost-kernel) vhost_kernel="no"
  ;;
  --enable-vhost-kernel) vhost_kernel="yes"
  ;;
  --disable-capstone) capstone="no"
  ;;
  --enable-capstone) capstone="yes"
  ;;
  --enable-capstone=git) capstone="git"
  ;;
  --enable-capstone=system) capstone="system"
  ;;
  --with-git=*) git="$optarg"
  ;;
  --enable-git-update) git_update=yes
  ;;
  --disable-git-update) git_update=no
  ;;
  --enable-debug-mutex) debug_mutex=yes
  ;;
  --disable-debug-mutex) debug_mutex=no
  ;;
  --enable-libpmem) libpmem=yes
  ;;
  --disable-libpmem) libpmem=no
  ;;
  --enable-xkbcommon) xkbcommon=yes
  ;;
  --disable-xkbcommon) xkbcommon=no
  ;;
  --enable-plugins) plugins="yes"
  ;;
  --disable-plugins) plugins="no"
  ;;
  --enable-containers) use_containers="yes"
  ;;
  --disable-containers) use_containers="no"
  ;;
  *)
      echo "ERROR: unknown option $opt"
      echo "Try '$0 --help' for more information"
      exit 1
  ;;
  esac
done

case "$cpu" in
    ppc)
           CPU_CFLAGS="-m32"
           LDFLAGS="-m32 $LDFLAGS"
           ;;
    ppc64)
           CPU_CFLAGS="-m64"
           LDFLAGS="-m64 $LDFLAGS"
           ;;
    sparc)
           CPU_CFLAGS="-m32 -mv8plus -mcpu=ultrasparc"
           LDFLAGS="-m32 -mv8plus $LDFLAGS"
           ;;
    sparc64)
           CPU_CFLAGS="-m64 -mcpu=ultrasparc"
           LDFLAGS="-m64 $LDFLAGS"
           ;;
    s390)
           CPU_CFLAGS="-m31"
           LDFLAGS="-m31 $LDFLAGS"
           ;;
    s390x)
           CPU_CFLAGS="-m64"
           LDFLAGS="-m64 $LDFLAGS"
           ;;
    i386)
           CPU_CFLAGS="-m32"
           LDFLAGS="-m32 $LDFLAGS"
           ;;
    x86_64)
           # ??? Only extremely old AMD cpus do not have cmpxchg16b.
           # If we truly care, we should simply detect this case at
           # runtime and generate the fallback to serial emulation.
           CPU_CFLAGS="-m64 -mcx16"
           LDFLAGS="-m64 $LDFLAGS"
           ;;
    x32)
           CPU_CFLAGS="-mx32"
           LDFLAGS="-mx32 $LDFLAGS"
           ;;
    # No special flags required for other host CPUs
esac

eval "cross_cc_${cpu}=\$host_cc"
cross_cc_vars="$cross_cc_vars cross_cc_${cpu}"
QEMU_CFLAGS="$CPU_CFLAGS $QEMU_CFLAGS"

# For user-mode emulation the host arch has to be one we explicitly
# support, even if we're using TCI.
if [ "$ARCH" = "unknown" ]; then
  bsd_user="no"
  linux_user="no"
fi

default_target_list=""

mak_wilds=""

if [ "$softmmu" = "yes" ]; then
    mak_wilds="${mak_wilds} $source_path/default-configs/*-softmmu.mak"
fi
if [ "$linux_user" = "yes" ]; then
    mak_wilds="${mak_wilds} $source_path/default-configs/*-linux-user.mak"
fi
if [ "$bsd_user" = "yes" ]; then
    mak_wilds="${mak_wilds} $source_path/default-configs/*-bsd-user.mak"
fi

if test -z "$target_list_exclude"; then
    for config in $mak_wilds; do
        default_target_list="${default_target_list} $(basename "$config" .mak)"
    done
else
    exclude_list=$(echo "$target_list_exclude" | sed -e 's/,/ /g')
    for config in $mak_wilds; do
        target="$(basename "$config" .mak)"
        exclude="no"
        for excl in $exclude_list; do
            if test "$excl" = "$target"; then
                exclude="yes"
                break;
            fi
        done
        if test "$exclude" = "no"; then
            default_target_list="${default_target_list} $target"
        fi
    done
fi

# Enumerate public trace backends for --help output
trace_backend_list=$(echo $(grep -le '^PUBLIC = True$' "$source_path"/scripts/tracetool/backend/*.py | sed -e 's/^.*\/\(.*\)\.py$/\1/'))

if test x"$show_help" = x"yes" ; then
cat << EOF

Usage: configure [options]
Options: [defaults in brackets after descriptions]

Standard options:
  --help                   print this message
  --prefix=PREFIX          install in PREFIX [$prefix]
  --interp-prefix=PREFIX   where to find shared libraries, etc.
                           use %M for cpu name [$interp_prefix]
  --target-list=LIST       set target list (default: build everything)
$(echo Available targets: $default_target_list | \
  fold -s -w 53 | sed -e 's/^/                           /')
  --target-list-exclude=LIST exclude a set of targets from the default target-list

Advanced options (experts only):
  --cross-prefix=PREFIX    use PREFIX for compile tools [$cross_prefix]
  --cc=CC                  use C compiler CC [$cc]
  --iasl=IASL              use ACPI compiler IASL [$iasl]
  --host-cc=CC             use C compiler CC [$host_cc] for code run at
                           build time
  --cxx=CXX                use C++ compiler CXX [$cxx]
  --objcc=OBJCC            use Objective-C compiler OBJCC [$objcc]
  --extra-cflags=CFLAGS    append extra C compiler flags QEMU_CFLAGS
  --extra-cxxflags=CXXFLAGS append extra C++ compiler flags QEMU_CXXFLAGS
  --extra-ldflags=LDFLAGS  append extra linker flags LDFLAGS
  --cross-cc-ARCH=CC       use compiler when building ARCH guest test cases
  --cross-cc-flags-ARCH=   use compiler flags when building ARCH guest tests
  --make=MAKE              use specified make [$make]
  --install=INSTALL        use specified install [$install]
  --python=PYTHON          use specified python [$python]
  --smbd=SMBD              use specified smbd [$smbd]
  --with-git=GIT           use specified git [$git]
  --static                 enable static build [$static]
  --mandir=PATH            install man pages in PATH
  --datadir=PATH           install firmware in PATH$confsuffix
  --docdir=PATH            install documentation in PATH$confsuffix
  --bindir=PATH            install binaries in PATH
  --libdir=PATH            install libraries in PATH
  --libexecdir=PATH        install helper binaries in PATH
  --sysconfdir=PATH        install config in PATH$confsuffix
  --localstatedir=PATH     install local state in PATH (set at runtime on win32)
  --firmwarepath=PATH      search PATH for firmware files
  --with-confsuffix=SUFFIX suffix for QEMU data inside datadir/libdir/sysconfdir [$confsuffix]
  --with-pkgversion=VERS   use specified string as sub-version of the package
  --enable-debug           enable common debug build options
  --enable-sanitizers      enable default sanitizers
  --disable-strip          disable stripping binaries
  --disable-werror         disable compilation abort on warning
  --disable-stack-protector disable compiler-provided stack protection
  --audio-drv-list=LIST    set audio drivers list:
                           Available drivers: $audio_possible_drivers
  --block-drv-whitelist=L  Same as --block-drv-rw-whitelist=L
  --block-drv-rw-whitelist=L
                           set block driver read-write whitelist
                           (affects only QEMU, not qemu-img)
  --block-drv-ro-whitelist=L
                           set block driver read-only whitelist
                           (affects only QEMU, not qemu-img)
  --enable-trace-backends=B Set trace backend
                           Available backends: $trace_backend_list
  --with-trace-file=NAME   Full PATH,NAME of file to store traces
                           Default:trace-<pid>
  --disable-slirp          disable SLIRP userspace network connectivity
  --enable-tcg-interpreter enable TCG with bytecode interpreter (TCI)
  --enable-malloc-trim     enable libc malloc_trim() for memory optimization
  --oss-lib                path to OSS library
  --cpu=CPU                Build for host CPU [$cpu]
  --with-coroutine=BACKEND coroutine backend. Supported options:
                           ucontext, sigaltstack, windows
  --enable-gcov            enable test coverage analysis with gcov
  --gcov=GCOV              use specified gcov [$gcov_tool]
  --disable-blobs          disable installing provided firmware blobs
  --with-vss-sdk=SDK-path  enable Windows VSS support in QEMU Guest Agent
  --with-win-sdk=SDK-path  path to Windows Platform SDK (to build VSS .tlb)
  --tls-priority           default TLS protocol/cipher priority string
  --enable-gprof           QEMU profiling with gprof
  --enable-profiler        profiler support
  --enable-debug-stack-usage
                           track the maximum stack usage of stacks created by qemu_alloc_stack
  --enable-plugins
                           enable plugins via shared library loading
  --disable-containers     don't use containers for cross-building

Optional features, enabled with --enable-FEATURE and
disabled with --disable-FEATURE, default is enabled if available:

  system          all system emulation targets
  user            supported user emulation targets
  linux-user      all linux usermode emulation targets
  bsd-user        all BSD usermode emulation targets
  docs            build documentation
  guest-agent     build the QEMU Guest Agent
  guest-agent-msi build guest agent Windows MSI installation package
  pie             Position Independent Executables
  modules         modules support (non-Windows)
  debug-tcg       TCG debugging (default is disabled)
  debug-info      debugging information
  sparse          sparse checker

  gnutls          GNUTLS cryptography support
  nettle          nettle cryptography support
  gcrypt          libgcrypt cryptography support
  auth-pam        PAM access control
  sdl             SDL UI
  sdl-image       SDL Image support for icons
  gtk             gtk UI
  vte             vte support for the gtk UI
  curses          curses UI
  iconv           font glyph conversion support
  vnc             VNC UI support
  vnc-sasl        SASL encryption for VNC server
  vnc-jpeg        JPEG lossy compression for VNC server
  vnc-png         PNG compression for VNC server
  cocoa           Cocoa UI (Mac OS X only)
  virtfs          VirtFS
  mpath           Multipath persistent reservation passthrough
  xen             xen backend driver support
  xen-pci-passthrough    PCI passthrough support for Xen
  brlapi          BrlAPI (Braile)
  curl            curl connectivity
  membarrier      membarrier system call (for Linux 4.14+ or Windows)
  fdt             fdt device tree
  kvm             KVM acceleration support
  hax             HAX acceleration support
  hvf             Hypervisor.framework acceleration support
  whpx            Windows Hypervisor Platform acceleration support
  rdma            Enable RDMA-based migration
  pvrdma          Enable PVRDMA support
  vde             support for vde network
  netmap          support for netmap network
  linux-aio       Linux AIO support
  cap-ng          libcap-ng support
  attr            attr and xattr support
  vhost-net       vhost-net kernel acceleration support
  vhost-vsock     virtio sockets device support
  vhost-scsi      vhost-scsi kernel target support
  vhost-crypto    vhost-user-crypto backend support
  vhost-kernel    vhost kernel backend support
  vhost-user      vhost-user backend support
  spice           spice
  rbd             rados block device (rbd)
  libiscsi        iscsi support
  libnfs          nfs support
  smartcard       smartcard support (libcacard)
  libusb          libusb (for usb passthrough)
  live-block-migration   Block migration in the main migration stream
  usb-redir       usb network redirection support
  lzo             support of lzo compression library
  snappy          support of snappy compression library
  bzip2           support of bzip2 compression library
                  (for reading bzip2-compressed dmg images)
  lzfse           support of lzfse compression library
                  (for reading lzfse-compressed dmg images)
  seccomp         seccomp support
  coroutine-pool  coroutine freelist (better performance)
  glusterfs       GlusterFS backend
  tpm             TPM support
  libssh          ssh block device support
  numa            libnuma support
  libxml2         for Parallels image format
  tcmalloc        tcmalloc support
  jemalloc        jemalloc support
  avx2            AVX2 optimization support
  replication     replication support
  opengl          opengl support
  virglrenderer   virgl rendering support
  xfsctl          xfsctl support
  qom-cast-debug  cast debugging support
  tools           build qemu-io, qemu-nbd and qemu-img tools
  vxhs            Veritas HyperScale vDisk backend support
  bochs           bochs image format support
  cloop           cloop image format support
  dmg             dmg image format support
  qcow1           qcow v1 image format support
  vdi             vdi image format support
  vvfat           vvfat image format support
  qed             qed image format support
  parallels       parallels image format support
  sheepdog        sheepdog block driver support
  crypto-afalg    Linux AF_ALG crypto backend driver
  capstone        capstone disassembler support
  debug-mutex     mutex debugging support
  libpmem         libpmem support
  xkbcommon       xkbcommon support

NOTE: The object files are built at the place where configure is launched
EOF
exit 0
fi

# Remove old dependency files to make sure that they get properly regenerated
rm -f */config-devices.mak.d

if test -z "$python"
then
    error_exit "Python not found. Use --python=/path/to/python"
fi

# Note that if the Python conditional here evaluates True we will exit
# with status 1 which is a shell 'false' value.
if ! $python -c 'import sys; sys.exit(sys.version_info < (3,5))'; then
  error_exit "Cannot use '$python', Python >= 3.5 is required." \
      "Use --python=/path/to/python to specify a supported Python."
fi

# Preserve python version since some functionality is dependent on it
python_version=$($python -c 'import sys; print("%d.%d.%d" % (sys.version_info[0], sys.version_info[1], sys.version_info[2]))' 2>/dev/null)

# Suppress writing compiled files
python="$python -B"

# Check that the C compiler works. Doing this here before testing
# the host CPU ensures that we had a valid CC to autodetect the
# $cpu var (and we should bail right here if that's not the case).
# It also allows the help message to be printed without a CC.
write_c_skeleton;
if compile_object ; then
  : C compiler works ok
else
    error_exit "\"$cc\" either does not exist or does not work"
fi
if ! compile_prog ; then
    error_exit "\"$cc\" cannot build an executable (is your linker broken?)"
fi

# Now we have handled --enable-tcg-interpreter and know we're not just
# printing the help message, bail out if the host CPU isn't supported.
if test "$ARCH" = "unknown"; then
    if test "$tcg_interpreter" = "yes" ; then
        echo "Unsupported CPU = $cpu, will use TCG with TCI (experimental)"
    else
        error_exit "Unsupported CPU = $cpu, try --enable-tcg-interpreter"
    fi
fi

# Consult white-list to determine whether to enable werror
# by default.  Only enable by default for git builds
if test -z "$werror" ; then
    if test -e "$source_path/.git" && \
        { test "$linux" = "yes" || test "$mingw32" = "yes"; }; then
        werror="yes"
    else
        werror="no"
    fi
fi

if test "$bogus_os" = "yes"; then
    # Now that we know that we're not printing the help and that
    # the compiler works (so the results of the check_defines we used
    # to identify the OS are reliable), if we didn't recognize the
    # host OS we should stop now.
    error_exit "Unrecognized host OS (uname -s reports '$(uname -s)')"
fi

# Check whether the compiler matches our minimum requirements:
cat > $TMPC << EOF
#if defined(__clang_major__) && defined(__clang_minor__)
# ifdef __apple_build_version__
#  if __clang_major__ < 5 || (__clang_major__ == 5 && __clang_minor__ < 1)
#   error You need at least XCode Clang v5.1 to compile QEMU
#  endif
# else
#  if __clang_major__ < 3 || (__clang_major__ == 3 && __clang_minor__ < 4)
#   error You need at least Clang v3.4 to compile QEMU
#  endif
# endif
#elif defined(__GNUC__) && defined(__GNUC_MINOR__)
# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8)
#  error You need at least GCC v4.8 to compile QEMU
# endif
#else
# error You either need GCC or Clang to compiler QEMU
#endif
int main (void) { return 0; }
EOF
if ! compile_prog "" "" ; then
    error_exit "You need at least GCC v4.8 or Clang v3.4 (or XCode Clang v5.1)"
fi

gcc_flags="-Wold-style-declaration -Wold-style-definition -Wtype-limits"
gcc_flags="-Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers $gcc_flags"
gcc_flags="-Wno-missing-include-dirs -Wempty-body -Wnested-externs $gcc_flags"
gcc_flags="-Wendif-labels -Wno-shift-negative-value $gcc_flags"
gcc_flags="-Wno-initializer-overrides -Wexpansion-to-defined $gcc_flags"
gcc_flags="-Wno-string-plus-int -Wno-typedef-redefinition $gcc_flags"
# Note that we do not add -Werror to gcc_flags here, because that would
# enable it for all configure tests. If a configure test failed due
# to -Werror this would just silently disable some features,
# so it's too error prone.

cc_has_warning_flag() {
    write_c_skeleton;

    # Use the positive sense of the flag when testing for -Wno-wombat
    # support (gcc will happily accept the -Wno- form of unknown
    # warning options).
    optflag="$(echo $1 | sed -e 's/^-Wno-/-W/')"
    compile_prog "-Werror $optflag" ""
}

for flag in $gcc_flags; do
    if cc_has_warning_flag $flag ; then
        QEMU_CFLAGS="$QEMU_CFLAGS $flag"
    fi
done

if test "$stack_protector" != "no"; then
  cat > $TMPC << EOF
int main(int argc, char *argv[])
{
    char arr[64], *p = arr, *c = argv[0];
    while (*c) {
        *p++ = *c++;
    }
    return 0;
}
EOF
  gcc_flags="-fstack-protector-strong -fstack-protector-all"
  sp_on=0
  for flag in $gcc_flags; do
    # We need to check both a compile and a link, since some compiler
    # setups fail only on a .c->.o compile and some only at link time
    if do_cc $QEMU_CFLAGS -Werror $flag -c -o $TMPO $TMPC &&
       compile_prog "-Werror $flag" ""; then
      QEMU_CFLAGS="$QEMU_CFLAGS $flag"
      sp_on=1
      break
    fi
  done
  if test "$stack_protector" = yes; then
    if test $sp_on = 0; then
      error_exit "Stack protector not supported"
    fi
  fi
fi

# Disable -Wmissing-braces on older compilers that warn even for
# the "universal" C zero initializer {0}.
cat > $TMPC << EOF
struct {
  int a[2];
} x = {0};
EOF
if compile_object "-Werror" "" ; then
  :
else
  QEMU_CFLAGS="$QEMU_CFLAGS -Wno-missing-braces"
fi

# Our module code doesn't support Windows
if test "$modules" = "yes" && test "$mingw32" = "yes" ; then
  error_exit "Modules are not available for Windows"
fi

# Static linking is not possible with modules or PIE
if test "$static" = "yes" ; then
  if test "$modules" = "yes" ; then
    error_exit "static and modules are mutually incompatible"
  fi
  if test "$pie" = "yes" ; then
    error_exit "static and pie are mutually incompatible"
  else
    pie="no"
  fi
fi

# Unconditional check for compiler __thread support
  cat > $TMPC << EOF
static __thread int tls_var;
int main(void) { return tls_var; }
EOF

if ! compile_prog "-Werror" "" ; then
    error_exit "Your compiler does not support the __thread specifier for " \
	"Thread-Local Storage (TLS). Please upgrade to a version that does."
fi

if test "$pie" = ""; then
  case "$cpu-$targetos" in
    i386-Linux|x86_64-Linux|x32-Linux|i386-OpenBSD|x86_64-OpenBSD)
      ;;
    *)
      pie="no"
      ;;
  esac
fi

if test "$pie" != "no" ; then
  cat > $TMPC << EOF

#ifdef __linux__
#  define THREAD __thread
#else
#  define THREAD
#endif

static THREAD int tls_var;

int main(void) { return tls_var; }

EOF
  # check we support --no-pie first...
  if compile_prog "-Werror -fno-pie" "-no-pie"; then
    CFLAGS_NOPIE="-fno-pie"
    LDFLAGS_NOPIE="-nopie"
  fi

  if compile_prog "-fPIE -DPIE" "-pie"; then
    QEMU_CFLAGS="-fPIE -DPIE $QEMU_CFLAGS"
    LDFLAGS="-pie $LDFLAGS"
    pie="yes"
    if compile_prog "" "-Wl,-z,relro -Wl,-z,now" ; then
      LDFLAGS="-Wl,-z,relro -Wl,-z,now $LDFLAGS"
    fi
  else
    if test "$pie" = "yes"; then
      error_exit "PIE not available due to missing toolchain support"
    else
      echo "Disabling PIE due to missing toolchain support"
      pie="no"
    fi
  fi
fi

##########################################
# __sync_fetch_and_and requires at least -march=i486. Many toolchains
# use i686 as default anyway, but for those that don't, an explicit
# specification is necessary

if test "$cpu" = "i386"; then
  cat > $TMPC << EOF
static int sfaa(int *ptr)
{
  return __sync_fetch_and_and(ptr, 0);
}

int main(void)
{
  int val = 42;
  val = __sync_val_compare_and_swap(&val, 0, 1);
  sfaa(&val);
  return val;
}
EOF
  if ! compile_prog "" "" ; then
    QEMU_CFLAGS="-march=i486 $QEMU_CFLAGS"
  fi
fi

#########################################
# Solaris specific configure tool chain decisions

if test "$solaris" = "yes" ; then
  if has $install; then
    :
  else
    error_exit "Solaris install program not found. Use --install=/usr/ucb/install or" \
        "install fileutils from www.blastwave.org using pkg-get -i fileutils" \
        "to get ginstall which is used by default (which lives in /opt/csw/bin)"
  fi
  if test "$(path_of $install)" = "/usr/sbin/install" ; then
    error_exit "Solaris /usr/sbin/install is not an appropriate install program." \
        "try ginstall from the GNU fileutils available from www.blastwave.org" \
        "using pkg-get -i fileutils, or use --install=/usr/ucb/install"
  fi
  if has ar; then
    :
  else
    if test -f /usr/ccs/bin/ar ; then
      error_exit "No path includes ar" \
          "Add /usr/ccs/bin to your path and rerun configure"
    fi
    error_exit "No path includes ar"
  fi
fi

if test -z "${target_list+xxx}" ; then
    for target in $default_target_list; do
        supported_target $target 2>/dev/null && \
            target_list="$target_list $target"
    done
    target_list="${target_list# }"
else
    target_list=$(echo "$target_list" | sed -e 's/,/ /g')
    for target in $target_list; do
        # Check that we recognised the target name; this allows a more
        # friendly error message than if we let it fall through.
        case " $default_target_list " in
            *" $target "*)
                ;;
            *)
                error_exit "Unknown target name '$target'"
                ;;
        esac
        supported_target $target || exit 1
    done
fi

# see if system emulation was really requested
case " $target_list " in
  *"-softmmu "*) softmmu=yes
  ;;
  *) softmmu=no
  ;;
esac

for target in $target_list; do
  case "$target" in
    arm-softmmu | aarch64-softmmu | i386-softmmu | x86_64-softmmu)
      edk2_blobs="yes"
      ;;
  esac
done
# The EDK2 binaries are compressed with bzip2
if test "$edk2_blobs" = "yes" && ! has bzip2; then
  error_exit "The bzip2 program is required for building QEMU"
fi

feature_not_found() {
  feature=$1
  remedy=$2

  error_exit "User requested feature $feature" \
      "configure was not able to find it." \
      "$remedy"
}

# ---
# big/little endian test
cat > $TMPC << EOF
short big_endian[] = { 0x4269, 0x4765, 0x4e64, 0x4961, 0x4e00, 0, };
short little_endian[] = { 0x694c, 0x7454, 0x654c, 0x6e45, 0x6944, 0x6e41, 0, };
extern int foo(short *, short *);
int main(int argc, char *argv[]) {
    return foo(big_endian, little_endian);
}
EOF

if compile_object ; then
    if strings -a $TMPO | grep -q BiGeNdIaN ; then
        bigendian="yes"
    elif strings -a $TMPO | grep -q LiTtLeEnDiAn ; then
        bigendian="no"
    else
        echo big/little test failed
    fi
else
    echo big/little test failed
fi

##########################################
# cocoa implies not SDL or GTK
# (the cocoa UI code currently assumes it is always the active UI
# and doesn't interact well with other UI frontend code)
if test "$cocoa" = "yes"; then
    if test "$sdl" = "yes"; then
        error_exit "Cocoa and SDL UIs cannot both be enabled at once"
    fi
    if test "$gtk" = "yes"; then
        error_exit "Cocoa and GTK UIs cannot both be enabled at once"
    fi
    gtk=no
    sdl=no
fi

# Some versions of Mac OS X incorrectly define SIZE_MAX
cat > $TMPC << EOF
#include <stdint.h>
#include <stdio.h>
int main(int argc, char *argv[]) {
    return printf("%zu", SIZE_MAX);
}
EOF
have_broken_size_max=no
if ! compile_object -Werror ; then
    have_broken_size_max=yes
fi

##########################################
# L2TPV3 probe

cat > $TMPC <<EOF
#include <sys/socket.h>
#include <linux/ip.h>
int main(void) { return sizeof(struct mmsghdr); }
EOF
if compile_prog "" "" ; then
  l2tpv3=yes
else
  l2tpv3=no
fi

#########################################
# vhost interdependencies and host support

# vhost backends
test "$vhost_user" = "" && vhost_user=yes
if test "$vhost_user" = "yes" && test "$mingw32" = "yes"; then
  error_exit "vhost-user isn't available on win32"
fi
test "$vhost_kernel" = "" && vhost_kernel=$linux
if test "$vhost_kernel" = "yes" && test "$linux" != "yes"; then
  error_exit "vhost-kernel is only available on Linux"
fi

# vhost-kernel devices
test "$vhost_scsi" = "" && vhost_scsi=$vhost_kernel
if test "$vhost_scsi" = "yes" && test "$vhost_kernel" != "yes"; then
  error_exit "--enable-vhost-scsi requires --enable-vhost-kernel"
fi
test "$vhost_vsock" = "" && vhost_vsock=$vhost_kernel
if test "$vhost_vsock" = "yes" && test "$vhost_kernel" != "yes"; then
  error_exit "--enable-vhost-vsock requires --enable-vhost-kernel"
fi

# vhost-user backends
test "$vhost_net_user" = "" && vhost_net_user=$vhost_user
if test "$vhost_net_user" = "yes" && test "$vhost_user" = "no"; then
  error_exit "--enable-vhost-net-user requires --enable-vhost-user"
fi
test "$vhost_crypto" = "" && vhost_crypto=$vhost_user
if test "$vhost_crypto" = "yes" && test "$vhost_user" = "no"; then
  error_exit "--enable-vhost-crypto requires --enable-vhost-user"
fi
test "$vhost_user_fs" = "" && vhost_user_fs=$vhost_user
if test "$vhost_user_fs" = "yes" && test "$vhost_user" = "no"; then
  error_exit "--enable-vhost-user-fs requires --enable-vhost-user"
fi

# OR the vhost-kernel and vhost-user values for simplicity
if test "$vhost_net" = ""; then
  test "$vhost_net_user" = "yes" && vhost_net=yes
  test "$vhost_kernel" = "yes" && vhost_net=yes
fi

##########################################
# MinGW / Mingw-w64 localtime_r/gmtime_r check

if test "$mingw32" = "yes"; then
    # Some versions of MinGW / Mingw-w64 lack localtime_r
    # and gmtime_r entirely.
    #
    # Some versions of Mingw-w64 define a macro for
    # localtime_r/gmtime_r.
    #
    # Some versions of Mingw-w64 will define functions
    # for localtime_r/gmtime_r, but only if you have
    # _POSIX_THREAD_SAFE_FUNCTIONS defined. For fun
    # though, unistd.h and pthread.h both define
    # that for you.
    #
    # So this #undef localtime_r and #include <unistd.h>
    # are not in fact redundant.
cat > $TMPC << EOF
#include <unistd.h>
#include <time.h>
#undef localtime_r
int main(void) { localtime_r(NULL, NULL); return 0; }
EOF
    if compile_prog "" "" ; then
        localtime_r="yes"
    else
        localtime_r="no"
    fi
fi

##########################################
# pkg-config probe

if ! has "$pkg_config_exe"; then
  error_exit "pkg-config binary '$pkg_config_exe' not found"
fi

##########################################
# NPTL probe

if test "$linux_user" = "yes"; then
  cat > $TMPC <<EOF
#include <sched.h>
#include <linux/futex.h>
int main(void) {
#if !defined(CLONE_SETTLS) || !defined(FUTEX_WAIT)
#error bork
#endif
  return 0;
}
EOF
  if ! compile_object ; then
    feature_not_found "nptl" "Install glibc and linux kernel headers."
  fi
fi

##########################################
# lzo check

if test "$lzo" != "no" ; then
    cat > $TMPC << EOF
#include <lzo/lzo1x.h>
int main(void) { lzo_version(); return 0; }
EOF
    if compile_prog "" "-llzo2" ; then
        libs_softmmu="$libs_softmmu -llzo2"
        lzo="yes"
    else
        if test "$lzo" = "yes"; then
            feature_not_found "liblzo2" "Install liblzo2 devel"
        fi
        lzo="no"
    fi
fi

##########################################
# snappy check

if test "$snappy" != "no" ; then
    cat > $TMPC << EOF
#include <snappy-c.h>
int main(void) { snappy_max_compressed_length(4096); return 0; }
EOF
    if compile_prog "" "-lsnappy" ; then
        libs_softmmu="$libs_softmmu -lsnappy"
        snappy="yes"
    else
        if test "$snappy" = "yes"; then
            feature_not_found "libsnappy" "Install libsnappy devel"
        fi
        snappy="no"
    fi
fi

##########################################
# bzip2 check

if test "$bzip2" != "no" ; then
    cat > $TMPC << EOF
#include <bzlib.h>
int main(void) { BZ2_bzlibVersion(); return 0; }
EOF
    if compile_prog "" "-lbz2" ; then
        bzip2="yes"
    else
        if test "$bzip2" = "yes"; then
            feature_not_found "libbzip2" "Install libbzip2 devel"
        fi
        bzip2="no"
    fi
fi

##########################################
# lzfse check

if test "$lzfse" != "no" ; then
    cat > $TMPC << EOF
#include <lzfse.h>
int main(void) { lzfse_decode_scratch_size(); return 0; }
EOF
    if compile_prog "" "-llzfse" ; then
        lzfse="yes"
    else
        if test "$lzfse" = "yes"; then
            feature_not_found "lzfse" "Install lzfse devel"
        fi
        lzfse="no"
    fi
fi

##########################################
# libseccomp check

if test "$seccomp" != "no" ; then
    libseccomp_minver="2.3.0"
    if $pkg_config --atleast-version=$libseccomp_minver libseccomp ; then
        seccomp_cflags="$($pkg_config --cflags libseccomp)"
        seccomp_libs="$($pkg_config --libs libseccomp)"
        seccomp="yes"
    else
        if test "$seccomp" = "yes" ; then
            feature_not_found "libseccomp" \
                 "Install libseccomp devel >= $libseccomp_minver"
        fi
        seccomp="no"
    fi
fi
##########################################
# xen probe

if test "$xen" != "no" ; then
  # Check whether Xen library path is specified via --extra-ldflags to avoid
  # overriding this setting with pkg-config output. If not, try pkg-config
  # to obtain all needed flags.

  if ! echo $EXTRA_LDFLAGS | grep tools/libxc > /dev/null && \
     $pkg_config --exists xencontrol ; then
    xen_ctrl_version="$(printf '%d%02d%02d' \
      $($pkg_config --modversion xencontrol | sed 's/\./ /g') )"
    xen=yes
    xen_pc="xencontrol xenstore xenguest xenforeignmemory xengnttab"
    xen_pc="$xen_pc xenevtchn xendevicemodel"
    if $pkg_config --exists xentoolcore; then
      xen_pc="$xen_pc xentoolcore"
    fi
    QEMU_CFLAGS="$QEMU_CFLAGS $($pkg_config --cflags $xen_pc)"
    libs_softmmu="$($pkg_config --libs $xen_pc) $libs_softmmu"
  else

    xen_libs="-lxenstore -lxenctrl -lxenguest"
    xen_stable_libs="-lxenforeignmemory -lxengnttab -lxenevtchn"

    # First we test whether Xen headers and libraries are available.
    # If no, we are done and there is no Xen support.
    # If yes, more tests are run to detect the Xen version.

    # Xen (any)
    cat > $TMPC <<EOF
#include <xenctrl.h>
int main(void) {
  return 0;
}
EOF
    if ! compile_prog "" "$xen_libs" ; then
      # Xen not found
      if test "$xen" = "yes" ; then
        feature_not_found "xen" "Install xen devel"
      fi
      xen=no

    # Xen unstable
    elif
        cat > $TMPC <<EOF &&
#undef XC_WANT_COMPAT_DEVICEMODEL_API
#define __XEN_TOOLS__
#include <xendevicemodel.h>
#include <xenforeignmemory.h>
int main(void) {
  xendevicemodel_handle *xd;
  xenforeignmemory_handle *xfmem;

  xd = xendevicemodel_open(0, 0);
  xendevicemodel_pin_memory_cacheattr(xd, 0, 0, 0, 0);

  xfmem = xenforeignmemory_open(0, 0);
  xenforeignmemory_map_resource(xfmem, 0, 0, 0, 0, 0, NULL, 0, 0);

  return 0;
}
EOF
        compile_prog "" "$xen_libs -lxendevicemodel $xen_stable_libs -lxentoolcore"
      then
      xen_stable_libs="-lxendevicemodel $xen_stable_libs -lxentoolcore"
      xen_ctrl_version=41100
      xen=yes
    elif
        cat > $TMPC <<EOF &&
#undef XC_WANT_COMPAT_MAP_FOREIGN_API
#include <xenforeignmemory.h>
#include <xentoolcore.h>
int main(void) {
  xenforeignmemory_handle *xfmem;

  xfmem = xenforeignmemory_open(0, 0);
  xenforeignmemory_map2(xfmem, 0, 0, 0, 0, 0, 0, 0);
  xentoolcore_restrict_all(0);

  return 0;
}
EOF
        compile_prog "" "$xen_libs -lxendevicemodel $xen_stable_libs -lxentoolcore"
      then
      xen_stable_libs="-lxendevicemodel $xen_stable_libs -lxentoolcore"
      xen_ctrl_version=41000
      xen=yes
    elif
        cat > $TMPC <<EOF &&
#undef XC_WANT_COMPAT_DEVICEMODEL_API
#define __XEN_TOOLS__
#include <xendevicemodel.h>
int main(void) {
  xendevicemodel_handle *xd;

  xd = xendevicemodel_open(0, 0);
  xendevicemodel_close(xd);

  return 0;
}
EOF
        compile_prog "" "$xen_libs -lxendevicemodel $xen_stable_libs"
      then
      xen_stable_libs="-lxendevicemodel $xen_stable_libs"
      xen_ctrl_version=40900
      xen=yes
    elif
        cat > $TMPC <<EOF &&
/*
 * If we have stable libs the we don't want the libxc compat
 * layers, regardless of what CFLAGS we may have been given.
 *
 * Also, check if xengnttab_grant_copy_segment_t is defined and
 * grant copy operation is implemented.
 */
#undef XC_WANT_COMPAT_EVTCHN_API
#undef XC_WANT_COMPAT_GNTTAB_API
#undef XC_WANT_COMPAT_MAP_FOREIGN_API
#include <xenctrl.h>
#include <xenstore.h>
#include <xenevtchn.h>
#include <xengnttab.h>
#include <xenforeignmemory.h>
#include <stdint.h>
#include <xen/hvm/hvm_info_table.h>
#if !defined(HVM_MAX_VCPUS)
# error HVM_MAX_VCPUS not defined
#endif
int main(void) {
  xc_interface *xc = NULL;
  xenforeignmemory_handle *xfmem;
  xenevtchn_handle *xe;
  xengnttab_handle *xg;
  xengnttab_grant_copy_segment_t* seg = NULL;

  xs_daemon_open();

  xc = xc_interface_open(0, 0, 0);
  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
  xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
  xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
  xc_hvm_create_ioreq_server(xc, 0, HVM_IOREQSRV_BUFIOREQ_ATOMIC, NULL);

  xfmem = xenforeignmemory_open(0, 0);
  xenforeignmemory_map(xfmem, 0, 0, 0, 0, 0);

  xe = xenevtchn_open(0, 0);
  xenevtchn_fd(xe);

  xg = xengnttab_open(0, 0);
  xengnttab_grant_copy(xg, 0, seg);

  return 0;
}
EOF
        compile_prog "" "$xen_libs $xen_stable_libs"
      then
      xen_ctrl_version=40800
      xen=yes
    elif
        cat > $TMPC <<EOF &&
/*
 * If we have stable libs the we don't want the libxc compat
 * layers, regardless of what CFLAGS we may have been given.
 */
#undef XC_WANT_COMPAT_EVTCHN_API
#undef XC_WANT_COMPAT_GNTTAB_API
#undef XC_WANT_COMPAT_MAP_FOREIGN_API
#include <xenctrl.h>
#include <xenstore.h>
#include <xenevtchn.h>
#include <xengnttab.h>
#include <xenforeignmemory.h>
#include <stdint.h>
#include <xen/hvm/hvm_info_table.h>
#if !defined(HVM_MAX_VCPUS)
# error HVM_MAX_VCPUS not defined
#endif
int main(void) {
  xc_interface *xc = NULL;
  xenforeignmemory_handle *xfmem;
  xenevtchn_handle *xe;
  xengnttab_handle *xg;

  xs_daemon_open();

  xc = xc_interface_open(0, 0, 0);
  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
  xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
  xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
  xc_hvm_create_ioreq_server(xc, 0, HVM_IOREQSRV_BUFIOREQ_ATOMIC, NULL);

  xfmem = xenforeignmemory_open(0, 0);
  xenforeignmemory_map(xfmem, 0, 0, 0, 0, 0);

  xe = xenevtchn_open(0, 0);
  xenevtchn_fd(xe);

  xg = xengnttab_open(0, 0);
  xengnttab_map_grant_ref(xg, 0, 0, 0);

  return 0;
}
EOF
        compile_prog "" "$xen_libs $xen_stable_libs"
      then
      xen_ctrl_version=40701
      xen=yes

    # Xen 4.6
    elif
        cat > $TMPC <<EOF &&
#include <xenctrl.h>
#include <xenstore.h>
#include <stdint.h>
#include <xen/hvm/hvm_info_table.h>
#if !defined(HVM_MAX_VCPUS)
# error HVM_MAX_VCPUS not defined
#endif
int main(void) {
  xc_interface *xc;
  xs_daemon_open();
  xc = xc_interface_open(0, 0, 0);
  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
  xc_gnttab_open(NULL, 0);
  xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
  xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
  xc_hvm_create_ioreq_server(xc, 0, HVM_IOREQSRV_BUFIOREQ_ATOMIC, NULL);
  xc_reserved_device_memory_map(xc, 0, 0, 0, 0, NULL, 0);
  return 0;
}
EOF
        compile_prog "" "$xen_libs"
      then
      xen_ctrl_version=40600
      xen=yes

    # Xen 4.5
    elif
        cat > $TMPC <<EOF &&
#include <xenctrl.h>
#include <xenstore.h>
#include <stdint.h>
#include <xen/hvm/hvm_info_table.h>
#if !defined(HVM_MAX_VCPUS)
# error HVM_MAX_VCPUS not defined
#endif
int main(void) {
  xc_interface *xc;
  xs_daemon_open();
  xc = xc_interface_open(0, 0, 0);
  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
  xc_gnttab_open(NULL, 0);
  xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
  xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
  xc_hvm_create_ioreq_server(xc, 0, 0, NULL);
  return 0;
}
EOF
        compile_prog "" "$xen_libs"
      then
      xen_ctrl_version=40500
      xen=yes

    elif
        cat > $TMPC <<EOF &&
#include <xenctrl.h>
#include <xenstore.h>
#include <stdint.h>
#include <xen/hvm/hvm_info_table.h>
#if !defined(HVM_MAX_VCPUS)
# error HVM_MAX_VCPUS not defined
#endif
int main(void) {
  xc_interface *xc;
  xs_daemon_open();
  xc = xc_interface_open(0, 0, 0);
  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
  xc_gnttab_open(NULL, 0);
  xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
  xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
  return 0;
}
EOF
        compile_prog "" "$xen_libs"
      then
      xen_ctrl_version=40200
      xen=yes

    else
      if test "$xen" = "yes" ; then
        feature_not_found "xen (unsupported version)" \
                          "Install a supported xen (xen 4.2 or newer)"
      fi
      xen=no
    fi

    if test "$xen" = yes; then
      if test $xen_ctrl_version -ge 40701  ; then
        libs_softmmu="$xen_stable_libs $libs_softmmu"
      fi
      libs_softmmu="$xen_libs $libs_softmmu"
    fi
  fi
fi

if test "$xen_pci_passthrough" != "no"; then
  if test "$xen" = "yes" && test "$linux" = "yes"; then
    xen_pci_passthrough=yes
  else
    if test "$xen_pci_passthrough" = "yes"; then
      error_exit "User requested feature Xen PCI Passthrough" \
          " but this feature requires /sys from Linux"
    fi
    xen_pci_passthrough=no
  fi
fi

##########################################
# Windows Hypervisor Platform accelerator (WHPX) check
if test "$whpx" != "no" ; then
    if check_include "WinHvPlatform.h" && check_include "WinHvEmulation.h"; then
        whpx="yes"
    else
        if test "$whpx" = "yes"; then
            feature_not_found "WinHvPlatform" "WinHvEmulation is not installed"
        fi
        whpx="no"
    fi
fi

##########################################
# Sparse probe
if test "$sparse" != "no" ; then
  if has cgcc; then
    sparse=yes
  else
    if test "$sparse" = "yes" ; then
      feature_not_found "sparse" "Install sparse binary"
    fi
    sparse=no
  fi
fi

##########################################
# X11 probe
if $pkg_config --exists "x11"; then
    have_x11=yes
    x11_cflags=$($pkg_config --cflags x11)
    x11_libs=$($pkg_config --libs x11)
fi

##########################################
# GTK probe

if test "$gtk" != "no"; then
    gtkpackage="gtk+-3.0"
    gtkx11package="gtk+-x11-3.0"
    gtkversion="3.14.0"
    if $pkg_config --exists "$gtkpackage >= $gtkversion"; then
        gtk_cflags=$($pkg_config --cflags $gtkpackage)
        gtk_libs=$($pkg_config --libs $gtkpackage)
        gtk_version=$($pkg_config --modversion $gtkpackage)
        if $pkg_config --exists "$gtkx11package >= $gtkversion"; then
            need_x11=yes
            gtk_cflags="$gtk_cflags $x11_cflags"
            gtk_libs="$gtk_libs $x11_libs"
        fi
        gtk="yes"
    elif test "$gtk" = "yes"; then
        feature_not_found "gtk" "Install gtk3-devel"
    else
        gtk="no"
    fi
fi


##########################################
# GNUTLS probe

if test "$gnutls" != "no"; then
    pass="no"
    if $pkg_config --exists "gnutls >= 3.1.18"; then
        gnutls_cflags=$($pkg_config --cflags gnutls)
        gnutls_libs=$($pkg_config --libs gnutls)
        # Packaging for the static libraries is not always correct.
        # At least ubuntu 18.04 ships only shared libraries.
        write_c_skeleton
        if compile_prog "" "$gnutls_libs" ; then
            LIBS="$gnutls_libs $LIBS"
            QEMU_CFLAGS="$QEMU_CFLAGS $gnutls_cflags"
            pass="yes"
        fi
    fi
    if test "$pass" = "no" && test "$gnutls" = "yes"; then
	feature_not_found "gnutls" "Install gnutls devel >= 3.1.18"
    else
        gnutls="$pass"
    fi
fi


# If user didn't give a --disable/enable-gcrypt flag,
# then mark as disabled if user requested nettle
# explicitly
if test -z "$gcrypt"
then
    if test "$nettle" = "yes"
    then
        gcrypt="no"
    fi
fi

# If user didn't give a --disable/enable-nettle flag,
# then mark as disabled if user requested gcrypt
# explicitly
if test -z "$nettle"
then
    if test "$gcrypt" = "yes"
    then
        nettle="no"
    fi
fi

has_libgcrypt() {
    if ! has "libgcrypt-config"
    then
	return 1
    fi

    if test -n "$cross_prefix"
    then
	host=$(libgcrypt-config --host)
	if test "$host-" != $cross_prefix
	then
	    return 1
	fi
    fi

    maj=`libgcrypt-config --version | awk -F . '{print $1}'`
    min=`libgcrypt-config --version | awk -F . '{print $2}'`

    if test $maj != 1 || test $min -lt 5
    then
       return 1
    fi

    return 0
}


if test "$nettle" != "no"; then
    pass="no"
    if $pkg_config --exists "nettle >= 2.7.1"; then
        nettle_cflags=$($pkg_config --cflags nettle)
        nettle_libs=$($pkg_config --libs nettle)
        nettle_version=$($pkg_config --modversion nettle)
        # Link test to make sure the given libraries work (e.g for static).
        write_c_skeleton
        if compile_prog "" "$nettle_libs" ; then
            LIBS="$nettle_libs $LIBS"
            QEMU_CFLAGS="$QEMU_CFLAGS $nettle_cflags"
            if test -z "$gcrypt"; then
               gcrypt="no"
            fi
            pass="yes"
        fi
    fi
    if test "$pass" = "yes"
    then
        cat > $TMPC << EOF
#include <nettle/xts.h>
int main(void) {
  return 0;
}
EOF
        if compile_prog "$nettle_cflags" "$nettle_libs" ; then
            nettle_xts=yes
            qemu_private_xts=no
        fi
    fi
    if test "$pass" = "no" && test "$nettle" = "yes"; then
        feature_not_found "nettle" "Install nettle devel >= 2.7.1"
    else
        nettle="$pass"
    fi
fi

if test "$gcrypt" != "no"; then
    pass="no"
    if has_libgcrypt; then
        gcrypt_cflags=$(libgcrypt-config --cflags)
        gcrypt_libs=$(libgcrypt-config --libs)
        # Debian has removed -lgpg-error from libgcrypt-config
        # as it "spreads unnecessary dependencies" which in
        # turn breaks static builds...
        if test "$static" = "yes"
        then
            gcrypt_libs="$gcrypt_libs -lgpg-error"
        fi

        # Link test to make sure the given libraries work (e.g for static).
        write_c_skeleton
        if compile_prog "" "$gcrypt_libs" ; then
            LIBS="$gcrypt_libs $LIBS"
            QEMU_CFLAGS="$QEMU_CFLAGS $gcrypt_cflags"
            pass="yes"
        fi
    fi
    if test "$pass" = "yes"; then
        gcrypt="yes"
        cat > $TMPC << EOF
#include <gcrypt.h>
int main(void) {
  gcry_mac_hd_t handle;
  gcry_mac_open(&handle, GCRY_MAC_HMAC_MD5,
                GCRY_MAC_FLAG_SECURE, NULL);
  return 0;
}
EOF
        if compile_prog "$gcrypt_cflags" "$gcrypt_libs" ; then
            gcrypt_hmac=yes
        fi
        cat > $TMPC << EOF
#include <gcrypt.h>
int main(void) {
  gcry_cipher_hd_t handle;
  gcry_cipher_open(&handle, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_XTS, 0);
  return 0;
}
EOF
        if compile_prog "$gcrypt_cflags" "$gcrypt_libs" ; then
            gcrypt_xts=yes
            qemu_private_xts=no
        fi
    elif test "$gcrypt" = "yes"; then
        feature_not_found "gcrypt" "Install gcrypt devel >= 1.5.0"
    else
        gcrypt="no"
    fi
fi


if test "$gcrypt" = "yes" && test "$nettle" = "yes"
then
    error_exit "Only one of gcrypt & nettle can be enabled"
fi

##########################################
# libtasn1 - only for the TLS creds/session test suite

tasn1=yes
tasn1_cflags=""
tasn1_libs=""
if $pkg_config --exists "libtasn1"; then
    tasn1_cflags=$($pkg_config --cflags libtasn1)
    tasn1_libs=$($pkg_config --libs libtasn1)
else
    tasn1=no
fi


##########################################
# PAM probe

if test "$auth_pam" != "no"; then
    cat > $TMPC <<EOF
#include <security/pam_appl.h>
#include <stdio.h>
int main(void) {
   const char *service_name = "qemu";
   const char *user = "frank";
   const struct pam_conv pam_conv = { 0 };
   pam_handle_t *pamh = NULL;
   pam_start(service_name, user, &pam_conv, &pamh);
   return 0;
}
EOF
    if compile_prog "" "-lpam" ; then
        auth_pam=yes
    else
        if test "$auth_pam" = "yes"; then
            feature_not_found "PAM" "Install PAM development package"
        else
            auth_pam=no
        fi
    fi
fi

##########################################
# getifaddrs (for tests/test-io-channel-socket )

have_ifaddrs_h=yes
if ! check_include "ifaddrs.h" ; then
  have_ifaddrs_h=no
fi

##########################################
# VTE probe

if test "$vte" != "no"; then
    vteminversion="0.32.0"
    if $pkg_config --exists "vte-2.91"; then
      vtepackage="vte-2.91"
    else
      vtepackage="vte-2.90"
    fi
    if $pkg_config --exists "$vtepackage >= $vteminversion"; then
        vte_cflags=$($pkg_config --cflags $vtepackage)
        vte_libs=$($pkg_config --libs $vtepackage)
        vteversion=$($pkg_config --modversion $vtepackage)
        vte="yes"
    elif test "$vte" = "yes"; then
        feature_not_found "vte" "Install libvte-2.90/2.91 devel"
    else
        vte="no"
    fi
fi

##########################################
# SDL probe

# Look for sdl configuration program (pkg-config or sdl2-config).  Try
# sdl2-config even without cross prefix, and favour pkg-config over sdl2-config.

sdl_probe ()
{
  if $pkg_config sdl2 --exists; then
    sdlconfig="$pkg_config sdl2"
    sdlversion=$($sdlconfig --modversion 2>/dev/null)
  elif has "$sdl2_config"; then
    sdlconfig="$sdl2_config"
    sdlversion=$($sdlconfig --version)
  else
    if test "$sdl" = "yes" ; then
      feature_not_found "sdl" "Install SDL2-devel"
    fi
    sdl=no
    # no need to do the rest
    return
  fi
  if test -n "$cross_prefix" && test "$(basename "$sdlconfig")" = sdl2-config; then
    echo warning: using "\"$sdlconfig\"" to detect cross-compiled sdl >&2
  fi

  cat > $TMPC << EOF
#include <SDL.h>
#undef main /* We don't want SDL to override our main() */
int main( void ) { return SDL_Init (SDL_INIT_VIDEO); }
EOF
  sdl_cflags=$($sdlconfig --cflags 2>/dev/null)
  sdl_cflags="$sdl_cflags -Wno-undef"  # workaround 2.0.8 bug
  if test "$static" = "yes" ; then
    if $pkg_config sdl2 --exists; then
      sdl_libs=$($pkg_config sdl2 --static --libs 2>/dev/null)
    else
      sdl_libs=$($sdlconfig --static-libs 2>/dev/null)
    fi
  else
    sdl_libs=$($sdlconfig --libs 2>/dev/null)
  fi
  if compile_prog "$sdl_cflags" "$sdl_libs" ; then
    sdl=yes

    # static link with sdl ? (note: sdl.pc's --static --libs is broken)
    if test "$sdl" = "yes" && test "$static" = "yes" ; then
      if test $? = 0 && echo $sdl_libs | grep -- -laa > /dev/null; then
         sdl_libs="$sdl_libs $(aalib-config --static-libs 2>/dev/null)"
         sdl_cflags="$sdl_cflags $(aalib-config --cflags 2>/dev/null)"
      fi
      if compile_prog "$sdl_cflags" "$sdl_libs" ; then
	:
      else
        sdl=no
      fi
    fi # static link
  else # sdl not found
    if test "$sdl" = "yes" ; then
      feature_not_found "sdl" "Install SDL2 devel"
    fi
    sdl=no
  fi # sdl compile test
}

sdl_image_probe ()
{
    if test "$sdl_image" != "no" ; then
        if $pkg_config SDL2_image --exists; then
            if test "$static" = "yes"; then
                sdl_image_libs=$($pkg_config SDL2_image --libs --static 2>/dev/null)
            else
                sdl_image_libs=$($pkg_config SDL2_image --libs 2>/dev/null)
            fi
            sdl_image_cflags=$($pkg_config SDL2_image --cflags 2>/dev/null)
            sdl_image=yes

            sdl_cflags="$sdl_cflags $sdl_image_cflags"
            sdl_libs="$sdl_libs $sdl_image_libs"
        else
            if test "$sdl_image" = "yes" ; then
                feature_not_found "sdl_image" "Install SDL Image devel"
            else
                sdl_image=no
            fi
        fi
    fi
}

if test "$sdl" != "no" ; then
  sdl_probe
fi

if test "$sdl" = "yes" ; then
  sdl_image_probe
else
  if test "$sdl_image" = "yes"; then
    echo "warning: SDL Image requested, but SDL is not available, disabling"
  fi
  sdl_image=no
fi

if test "$sdl" = "yes" ; then
  cat > $TMPC <<EOF
#include <SDL.h>
#if defined(SDL_VIDEO_DRIVER_X11)
#include <X11/XKBlib.h>
#else
#error No x11 support
#endif
int main(void) { return 0; }
EOF
  if compile_prog "$sdl_cflags $x11_cflags" "$sdl_libs $x11_libs" ; then
    need_x11=yes
    sdl_cflags="$sdl_cflags $x11_cflags"
    sdl_libs="$sdl_libs $x11_libs"
  fi
fi

##########################################
# RDMA needs OpenFabrics libraries
if test "$rdma" != "no" ; then
  cat > $TMPC <<EOF
#include <rdma/rdma_cma.h>
int main(void) { return 0; }
EOF
  rdma_libs="-lrdmacm -libverbs -libumad"
  if compile_prog "" "$rdma_libs" ; then
    rdma="yes"
    libs_softmmu="$libs_softmmu $rdma_libs"
  else
    if test "$rdma" = "yes" ; then
        error_exit \
            " OpenFabrics librdmacm/libibverbs/libibumad not present." \
            " Your options:" \
            "  (1) Fast: Install infiniband packages (devel) from your distro." \
            "  (2) Cleanest: Install libraries from www.openfabrics.org" \
            "  (3) Also: Install softiwarp if you don't have RDMA hardware"
    fi
    rdma="no"
  fi
fi

##########################################
# PVRDMA detection

cat > $TMPC <<EOF &&
#include <sys/mman.h>

int
main(void)
{
    char buf = 0;
    void *addr = &buf;
    addr = mremap(addr, 0, 1, MREMAP_MAYMOVE | MREMAP_FIXED);

    return 0;
}
EOF

if test "$rdma" = "yes" ; then
    case "$pvrdma" in
    "")
        if compile_prog "" ""; then
            pvrdma="yes"
        else
            pvrdma="no"
        fi
        ;;
    "yes")
        if ! compile_prog "" ""; then
            error_exit "PVRDMA is not supported since mremap is not implemented"
        fi
        pvrdma="yes"
        ;;
    "no")
        pvrdma="no"
        ;;
    esac
else
    if test "$pvrdma" = "yes" ; then
        error_exit "PVRDMA requires rdma suppport"
    fi
    pvrdma="no"
fi

# Let's see if enhanced reg_mr is supported
if test "$pvrdma" = "yes" ; then

cat > $TMPC <<EOF &&
#include <infiniband/verbs.h>

int
main(void)
{
    struct ibv_mr *mr;
    struct ibv_pd *pd = NULL;
    size_t length = 10;
    uint64_t iova = 0;
    int access = 0;
    void *addr = NULL;

    mr = ibv_reg_mr_iova(pd, addr, length, iova, access);

    ibv_dereg_mr(mr);

    return 0;
}
EOF
    if ! compile_prog "" "-libverbs"; then
        QEMU_CFLAGS="$QEMU_CFLAGS -DLEGACY_RDMA_REG_MR"
    fi
fi

##########################################
# VNC SASL detection
if test "$vnc" = "yes" && test "$vnc_sasl" != "no" ; then
  cat > $TMPC <<EOF
#include <sasl/sasl.h>
#include <stdio.h>
int main(void) { sasl_server_init(NULL, "qemu"); return 0; }
EOF
  # Assuming Cyrus-SASL installed in /usr prefix
  vnc_sasl_cflags=""
  vnc_sasl_libs="-lsasl2"
  if compile_prog "$vnc_sasl_cflags" "$vnc_sasl_libs" ; then
    vnc_sasl=yes
    libs_softmmu="$vnc_sasl_libs $libs_softmmu"
    QEMU_CFLAGS="$QEMU_CFLAGS $vnc_sasl_cflags"
  else
    if test "$vnc_sasl" = "yes" ; then
      feature_not_found "vnc-sasl" "Install Cyrus SASL devel"
    fi
    vnc_sasl=no
  fi
fi

##########################################
# VNC JPEG detection
if test "$vnc" = "yes" && test "$vnc_jpeg" != "no" ; then
cat > $TMPC <<EOF
#include <stdio.h>
#include <jpeglib.h>
int main(void) { struct jpeg_compress_struct s; jpeg_create_compress(&s); return 0; }
EOF
    vnc_jpeg_cflags=""
    vnc_jpeg_libs="-ljpeg"
  if compile_prog "$vnc_jpeg_cflags" "$vnc_jpeg_libs" ; then
    vnc_jpeg=yes
    libs_softmmu="$vnc_jpeg_libs $libs_softmmu"
    QEMU_CFLAGS="$QEMU_CFLAGS $vnc_jpeg_cflags"
  else
    if test "$vnc_jpeg" = "yes" ; then
      feature_not_found "vnc-jpeg" "Install libjpeg-turbo devel"
    fi
    vnc_jpeg=no
  fi
fi

##########################################
# VNC PNG detection
if test "$vnc" = "yes" && test "$vnc_png" != "no" ; then
cat > $TMPC <<EOF
//#include <stdio.h>
#include <png.h>
#include <stddef.h>
int main(void) {
    png_structp png_ptr;
    png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
    return png_ptr != 0;
}
EOF
  if $pkg_config libpng --exists; then
    vnc_png_cflags=$($pkg_config libpng --cflags)
    vnc_png_libs=$($pkg_config libpng --libs)
  else
    vnc_png_cflags=""
    vnc_png_libs="-lpng"
  fi
  if compile_prog "$vnc_png_cflags" "$vnc_png_libs" ; then
    vnc_png=yes
    libs_softmmu="$vnc_png_libs $libs_softmmu"
    QEMU_CFLAGS="$QEMU_CFLAGS $vnc_png_cflags"
  else
    if test "$vnc_png" = "yes" ; then
      feature_not_found "vnc-png" "Install libpng devel"
    fi
    vnc_png=no
  fi
fi

##########################################
# xkbcommon probe
if test "$xkbcommon" != "no" ; then
  if $pkg_config xkbcommon --exists; then
    xkbcommon_cflags=$($pkg_config xkbcommon --cflags)
    xkbcommon_libs=$($pkg_config xkbcommon --libs)
    xkbcommon=yes
  else
    if test "$xkbcommon" = "yes" ; then
      feature_not_found "xkbcommon" "Install libxkbcommon-devel"
    fi
    xkbcommon=no
  fi
fi


##########################################
# xfsctl() probe, used for file-posix.c
if test "$xfs" != "no" ; then
  cat > $TMPC << EOF
#include <stddef.h>  /* NULL */
#include <xfs/xfs.h>
int main(void)
{
    xfsctl(NULL, 0, 0, NULL);
    return 0;
}
EOF
  if compile_prog "" "" ; then
    xfs="yes"
  else
    if test "$xfs" = "yes" ; then
      feature_not_found "xfs" "Instal xfsprogs/xfslibs devel"
    fi
    xfs=no
  fi
fi

##########################################
# vde libraries probe
if test "$vde" != "no" ; then
  vde_libs="-lvdeplug"
  cat > $TMPC << EOF
#include <libvdeplug.h>
int main(void)
{
    struct vde_open_args a = {0, 0, 0};
    char s[] = "";
    vde_open(s, s, &a);
    return 0;
}
EOF
  if compile_prog "" "$vde_libs" ; then
    vde=yes
  else
    if test "$vde" = "yes" ; then
      feature_not_found "vde" "Install vde (Virtual Distributed Ethernet) devel"
    fi
    vde=no
  fi
fi

##########################################
# netmap support probe
# Apart from looking for netmap headers, we make sure that the host API version
# supports the netmap backend (>=11). The upper bound (15) is meant to simulate
# a minor/major version number. Minor new features will be marked with values up
# to 15, and if something happens that requires a change to the backend we will
# move above 15, submit the backend fixes and modify this two bounds.
if test "$netmap" != "no" ; then
  cat > $TMPC << EOF
#include <inttypes.h>
#include <net/if.h>
#include <net/netmap.h>
#include <net/netmap_user.h>
#if (NETMAP_API < 11) || (NETMAP_API > 15)
#error
#endif
int main(void) { return 0; }
EOF
  if compile_prog "" "" ; then
    netmap=yes
  else
    if test "$netmap" = "yes" ; then
      feature_not_found "netmap"
    fi
    netmap=no
  fi
fi

##########################################
# libcap-ng library probe
if test "$cap_ng" != "no" ; then
  cap_libs="-lcap-ng"
  cat > $TMPC << EOF
#include <cap-ng.h>
int main(void)
{
    capng_capability_to_name(CAPNG_EFFECTIVE);
    return 0;
}
EOF
  if compile_prog "" "$cap_libs" ; then
    cap_ng=yes
    libs_tools="$cap_libs $libs_tools"
  else
    if test "$cap_ng" = "yes" ; then
      feature_not_found "cap_ng" "Install libcap-ng devel"
    fi
    cap_ng=no
  fi
fi

##########################################
# Sound support libraries probe

audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/,/ /g')
for drv in $audio_drv_list; do
    case $drv in
    alsa | try-alsa)
    if $pkg_config alsa --exists; then
        alsa_libs=$($pkg_config alsa --libs)
        if test "$drv" = "try-alsa"; then
            audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/try-alsa/alsa/')
        fi
    else
        if test "$drv" = "try-alsa"; then
            audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/try-alsa//')
        else
            error_exit "$drv check failed" \
                "Make sure to have the $drv libs and headers installed."
        fi
    fi
    ;;

    pa | try-pa)
    if $pkg_config libpulse --exists; then
        pulse_libs=$($pkg_config libpulse --libs)
        if test "$drv" = "try-pa"; then
            audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/try-pa/pa/')
        fi
    else
        if test "$drv" = "try-pa"; then
            audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/try-pa//')
        else
            error_exit "$drv check failed" \
                "Make sure to have the $drv libs and headers installed."
        fi
    fi
    ;;

    sdl)
    if test "$sdl" = "no"; then
        error_exit "sdl not found or disabled, can not use sdl audio driver"
    fi
    ;;

    try-sdl)
    if test "$sdl" = "no"; then
        audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/try-sdl//')
    else
        audio_drv_list=$(echo "$audio_drv_list" | sed -e 's/try-sdl/sdl/')
    fi
    ;;

    coreaudio)
      coreaudio_libs="-framework CoreAudio"
    ;;

    dsound)
      dsound_libs="-lole32 -ldxguid"
      audio_win_int="yes"
    ;;

    oss)
      oss_libs="$oss_lib"
    ;;

    *)
    echo "$audio_possible_drivers" | grep -q "\<$drv\>" || {
        error_exit "Unknown driver '$drv' selected" \
            "Possible drivers are: $audio_possible_drivers"
    }
    ;;
    esac
done

##########################################
# BrlAPI probe

if test "$brlapi" != "no" ; then
  brlapi_libs="-lbrlapi"
  cat > $TMPC << EOF
#include <brlapi.h>
#include <stddef.h>
int main( void ) { return brlapi__openConnection (NULL, NULL, NULL); }
EOF
  if compile_prog "" "$brlapi_libs" ; then
    brlapi=yes
  else
    if test "$brlapi" = "yes" ; then
      feature_not_found "brlapi" "Install brlapi devel"
    fi
    brlapi=no
  fi
fi

##########################################
# iconv probe
if test "$iconv" != "no" ; then
  cat > $TMPC << EOF
#include <iconv.h>
int main(void) {
  iconv_t conv = iconv_open("WCHAR_T", "UCS-2");
  return conv != (iconv_t) -1;
}
EOF
  iconv_prefix_list="/usr/local:/usr"
  iconv_lib_list=":-liconv"
  IFS=:
  for iconv_prefix in $iconv_prefix_list; do
    IFS=:
    iconv_cflags="-I$iconv_prefix/include"
    iconv_ldflags="-L$iconv_prefix/lib"
    for iconv_link in $iconv_lib_list; do
      unset IFS
      iconv_lib="$iconv_ldflags $iconv_link"
      echo "looking at iconv in '$iconv_cflags' '$iconv_lib'" >> config.log
      if compile_prog "$iconv_cflags" "$iconv_lib" ; then
        iconv_found=yes
        break
      fi
    done
    if test "$iconv_found" = yes ; then
      break
    fi
  done
  if test "$iconv_found" = "yes" ; then
    iconv=yes
  else
    if test "$iconv" = "yes" ; then
      feature_not_found "iconv" "Install iconv devel"
    fi
    iconv=no
  fi
fi

##########################################
# curses probe
if test "$iconv" = "no" ; then
  # curses will need iconv
  curses=no
fi
if test "$curses" != "no" ; then
  if test "$mingw32" = "yes" ; then
    curses_inc_list="$($pkg_config --cflags ncurses 2>/dev/null):"
    curses_lib_list="$($pkg_config --libs ncurses 2>/dev/null):-lpdcurses"
  else
    curses_inc_list="$($pkg_config --cflags ncursesw 2>/dev/null):-I/usr/include/ncursesw:"
    curses_lib_list="$($pkg_config --libs ncursesw 2>/dev/null):-lncursesw:-lcursesw"
  fi
  curses_found=no
  cat > $TMPC << EOF
#include <locale.h>
#include <curses.h>
#include <wchar.h>
#include <langinfo.h>
int main(void) {
  const char *codeset;
  wchar_t wch = L'w';
  setlocale(LC_ALL, "");
  resize_term(0, 0);
  addwstr(L"wide chars\n");
  addnwstr(&wch, 1);
  add_wch(WACS_DEGREE);
  codeset = nl_langinfo(CODESET);
  return codeset != 0;
}
EOF
  IFS=:
  for curses_inc in $curses_inc_list; do
    # Make sure we get the wide character prototypes
    curses_inc="-DNCURSES_WIDECHAR $curses_inc"
    IFS=:
    for curses_lib in $curses_lib_list; do
      unset IFS
      if compile_prog "$curses_inc" "$curses_lib" ; then
        curses_found=yes
        break
      fi
    done
    if test "$curses_found" = yes ; then
      break
    fi
  done
  unset IFS
  if test "$curses_found" = "yes" ; then
    curses=yes
  else
    if test "$curses" = "yes" ; then
      feature_not_found "curses" "Install ncurses devel"
    fi
    curses=no
  fi
fi

##########################################
# curl probe
if test "$curl" != "no" ; then
  if $pkg_config libcurl --exists; then
    curlconfig="$pkg_config libcurl"
  else
    curlconfig=curl-config
  fi
  cat > $TMPC << EOF
#include <curl/curl.h>
int main(void) { curl_easy_init(); curl_multi_setopt(0, 0, 0); return 0; }
EOF
  curl_cflags=$($curlconfig --cflags 2>/dev/null)
  curl_libs=$($curlconfig --libs 2>/dev/null)
  if compile_prog "$curl_cflags" "$curl_libs" ; then
    curl=yes
  else
    if test "$curl" = "yes" ; then
      feature_not_found "curl" "Install libcurl devel"
    fi
    curl=no
  fi
fi # test "$curl"

##########################################
# glib support probe

glib_req_ver=2.48
glib_modules=gthread-2.0
if test "$modules" = yes; then
    glib_modules="$glib_modules gmodule-export-2.0"
fi
if test "$plugins" = yes; then
    glib_modules="$glib_modules gmodule-2.0"
fi

# This workaround is required due to a bug in pkg-config file for glib as it
# doesn't define GLIB_STATIC_COMPILATION for pkg-config --static

if test "$static" = yes && test "$mingw32" = yes; then
    QEMU_CFLAGS="-DGLIB_STATIC_COMPILATION $QEMU_CFLAGS"
fi

for i in $glib_modules; do
    if $pkg_config --atleast-version=$glib_req_ver $i; then
        glib_cflags=$($pkg_config --cflags $i)
        glib_libs=$($pkg_config --libs $i)
        QEMU_CFLAGS="$glib_cflags $QEMU_CFLAGS"
        LIBS="$glib_libs $LIBS"
        libs_qga="$glib_libs $libs_qga"
    else
        error_exit "glib-$glib_req_ver $i is required to compile QEMU"
    fi
done

if $pkg_config --atleast-version=$glib_req_ver gio-2.0; then
    gio=yes
    gio_cflags=$($pkg_config --cflags gio-2.0)
    gio_libs=$($pkg_config --libs gio-2.0)
else
    gio=no
fi

# Sanity check that the current size_t matches the
# size that glib thinks it should be. This catches
# problems on multi-arch where people try to build
# 32-bit QEMU while pointing at 64-bit glib headers
cat > $TMPC <<EOF
#include <glib.h>
#include <unistd.h>

#define QEMU_BUILD_BUG_ON(x) \
  typedef char qemu_build_bug_on[(x)?-1:1] __attribute__((unused));

int main(void) {
   QEMU_BUILD_BUG_ON(sizeof(size_t) != GLIB_SIZEOF_SIZE_T);
   return 0;
}
EOF

if ! compile_prog "$CFLAGS" "$LIBS" ; then
    error_exit "sizeof(size_t) doesn't match GLIB_SIZEOF_SIZE_T."\
               "You probably need to set PKG_CONFIG_LIBDIR"\
	       "to point to the right pkg-config files for your"\
	       "build target"
fi

# Silence clang 3.5.0 warnings about glib attribute __alloc_size__ usage
cat > $TMPC << EOF
#include <glib.h>
int main(void) { return 0; }
EOF
if ! compile_prog "$glib_cflags -Werror" "$glib_libs" ; then
    if cc_has_warning_flag "-Wno-unknown-attributes"; then
        glib_cflags="-Wno-unknown-attributes $glib_cflags"
        CFLAGS="-Wno-unknown-attributes $CFLAGS"
    fi
fi

#########################################
# zlib check

if test "$zlib" != "no" ; then
    if $pkg_config --exists zlib; then
        zlib_cflags=$($pkg_config --cflags zlib)
        zlib_libs=$($pkg_config --libs zlib)
        QEMU_CFLAGS="$zlib_cflags $QEMU_CFLAGS"
        LIBS="$zlib_libs $LIBS"
    else
        cat > $TMPC << EOF
#include <zlib.h>
int main(void) { zlibVersion(); return 0; }
EOF
        if compile_prog "" "-lz" ; then
            LIBS="$LIBS -lz"
        else
            error_exit "zlib check failed" \
                "Make sure to have the zlib libs and headers installed."
        fi
    fi
fi

##########################################
# SHA command probe for modules
if test "$modules" = yes; then
    shacmd_probe="sha1sum sha1 shasum"
    for c in $shacmd_probe; do
        if has $c; then
            shacmd="$c"
            break
        fi
    done
    if test "$shacmd" = ""; then
        error_exit "one of the checksum commands is required to enable modules: $shacmd_probe"
    fi
fi

##########################################
# pixman support probe

if test "$want_tools" = "no" && test "$softmmu" = "no"; then
  pixman_cflags=
  pixman_libs=
elif $pkg_config --atleast-version=0.21.8 pixman-1 > /dev/null 2>&1; then
  pixman_cflags=$($pkg_config --cflags pixman-1)
  pixman_libs=$($pkg_config --libs pixman-1)
else
  error_exit "pixman >= 0.21.8 not present." \
      "Please install the pixman devel package."
fi

##########################################
# libmpathpersist probe

if test "$mpath" != "no" ; then
  # probe for the new API
  cat > $TMPC <<EOF
#include <libudev.h>
#include <mpath_persist.h>
unsigned mpath_mx_alloc_len = 1024;
int logsink;
static struct config *multipath_conf;
extern struct udev *udev;
extern struct config *get_multipath_config(void);
extern void put_multipath_config(struct config *conf);
struct udev *udev;
struct config *get_multipath_config(void) { return multipath_conf; }
void put_multipath_config(struct config *conf) { }

int main(void) {
    udev = udev_new();
    multipath_conf = mpath_lib_init();
    return 0;
}
EOF
  if compile_prog "" "-ludev -lmultipath -lmpathpersist" ; then
    mpathpersist=yes
    mpathpersist_new_api=yes
  else
    # probe for the old API
    cat > $TMPC <<EOF
#include <libudev.h>
#include <mpath_persist.h>
unsigned mpath_mx_alloc_len = 1024;
int logsink;
int main(void) {
    struct udev *udev = udev_new();
    mpath_lib_init(udev);
    return 0;
}
EOF
    if compile_prog "" "-ludev -lmultipath -lmpathpersist" ; then
      mpathpersist=yes
      mpathpersist_new_api=no
    else
      mpathpersist=no
    fi
  fi
else
  mpathpersist=no
fi

##########################################
# pthread probe
PTHREADLIBS_LIST="-pthread -lpthread -lpthreadGC2"

pthread=no
cat > $TMPC << EOF
#include <pthread.h>
static void *f(void *p) { return NULL; }
int main(void) {
  pthread_t thread;
  pthread_create(&thread, 0, f, 0);
  return 0;
}
EOF
if compile_prog "" "" ; then
  pthread=yes
else
  for pthread_lib in $PTHREADLIBS_LIST; do
    if compile_prog "" "$pthread_lib" ; then
      pthread=yes
      found=no
      for lib_entry in $LIBS; do
        if test "$lib_entry" = "$pthread_lib"; then
          found=yes
          break
        fi
      done
      if test "$found" = "no"; then
        LIBS="$pthread_lib $LIBS"
        libs_qga="$pthread_lib $libs_qga"
      fi
      PTHREAD_LIB="$pthread_lib"
      break
    fi
  done
fi

if test "$mingw32" != yes && test "$pthread" = no; then
  error_exit "pthread check failed" \
      "Make sure to have the pthread libs and headers installed."
fi

# check for pthread_setname_np with thread id
pthread_setname_np_w_tid=no
cat > $TMPC << EOF
#include <pthread.h>

static void *f(void *p) { return NULL; }
int main(void)
{
    pthread_t thread;
    pthread_create(&thread, 0, f, 0);
    pthread_setname_np(thread, "QEMU");
    return 0;
}
EOF
if compile_prog "" "$pthread_lib" ; then
  pthread_setname_np_w_tid=yes
fi

# check for pthread_setname_np without thread id
pthread_setname_np_wo_tid=no
cat > $TMPC << EOF
#include <pthread.h>

static void *f(void *p) { pthread_setname_np("QEMU"); }
int main(void)
{
    pthread_t thread;
    pthread_create(&thread, 0, f, 0);
    return 0;
}
EOF
if compile_prog "" "$pthread_lib" ; then
  pthread_setname_np_wo_tid=yes
fi

##########################################
# rbd probe
if test "$rbd" != "no" ; then
  cat > $TMPC <<EOF
#include <stdio.h>
#include <rbd/librbd.h>
int main(void) {
    rados_t cluster;
    rados_create(&cluster, NULL);
    return 0;
}
EOF
  rbd_libs="-lrbd -lrados"
  if compile_prog "" "$rbd_libs" ; then
    rbd=yes
  else
    if test "$rbd" = "yes" ; then
      feature_not_found "rados block device" "Install librbd/ceph devel"
    fi
    rbd=no
  fi
fi

##########################################
# libssh probe
if test "$libssh" != "no" ; then
  if $pkg_config --exists libssh; then
    libssh_cflags=$($pkg_config libssh --cflags)
    libssh_libs=$($pkg_config libssh --libs)
    libssh=yes
  else
    if test "$libssh" = "yes" ; then
      error_exit "libssh required for --enable-libssh"
    fi
    libssh=no
  fi
fi

##########################################
# Check for libssh 0.8
# This is done like this instead of using the LIBSSH_VERSION_* and
# SSH_VERSION_* macros because some distributions in the past shipped
# snapshots of the future 0.8 from Git, and those snapshots did not
# have updated version numbers (still referring to 0.7.0).

if test "$libssh" = "yes"; then
  cat > $TMPC <<EOF
#include <libssh/libssh.h>
int main(void) { return ssh_get_server_publickey(NULL, NULL); }
EOF
  if compile_prog "$libssh_cflags" "$libssh_libs"; then
    libssh_cflags="-DHAVE_LIBSSH_0_8 $libssh_cflags"
  fi
fi

##########################################
# linux-aio probe

if test "$linux_aio" != "no" ; then
  cat > $TMPC <<EOF
#include <libaio.h>
#include <sys/eventfd.h>
#include <stddef.h>
int main(void) { io_setup(0, NULL); io_set_eventfd(NULL, 0); eventfd(0, 0); return 0; }
EOF
  if compile_prog "" "-laio" ; then
    linux_aio=yes
  else
    if test "$linux_aio" = "yes" ; then
      feature_not_found "linux AIO" "Install libaio devel"
    fi
    linux_aio=no
  fi
fi

##########################################
# TPM emulation is only on POSIX

if test "$tpm" = ""; then
  if test "$mingw32" = "yes"; then
    tpm=no
  else
    tpm=yes
  fi
elif test "$tpm" = "yes"; then
  if test "$mingw32" = "yes" ; then
    error_exit "TPM emulation only available on POSIX systems"
  fi
fi

##########################################
# attr probe

if test "$attr" != "no" ; then
  cat > $TMPC <<EOF
#include <stdio.h>
#include <sys/types.h>
#ifdef CONFIG_LIBATTR
#include <attr/xattr.h>
#else
#include <sys/xattr.h>
#endif
int main(void) { getxattr(NULL, NULL, NULL, 0); setxattr(NULL, NULL, NULL, 0, 0); return 0; }
EOF
  if compile_prog "" "" ; then
    attr=yes
  # Older distros have <attr/xattr.h>, and need -lattr:
  elif compile_prog "-DCONFIG_LIBATTR" "-lattr" ; then
    attr=yes
    LIBS="-lattr $LIBS"
    libattr=yes
  else
    if test "$attr" = "yes" ; then
      feature_not_found "ATTR" "Install libc6 or libattr devel"
    fi
    attr=no
  fi
fi

##########################################
# iovec probe
cat > $TMPC <<EOF
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
int main(void) { return sizeof(struct iovec); }
EOF
iovec=no
if compile_prog "" "" ; then
  iovec=yes
fi

##########################################
# preadv probe
cat > $TMPC <<EOF
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
int main(void) { return preadv(0, 0, 0, 0); }
EOF
preadv=no
if compile_prog "" "" ; then
  preadv=yes
fi

##########################################
# fdt probe
# fdt support is mandatory for at least some target architectures,
# so insist on it if we're building those system emulators.
fdt_required=no
for target in $target_list; do
  case $target in
    aarch64*-softmmu|arm*-softmmu|ppc*-softmmu|microblaze*-softmmu|mips64el-softmmu|riscv*-softmmu)
      fdt_required=yes
    ;;
  esac
done

if test "$fdt_required" = "yes"; then
  if test "$fdt" = "no"; then
    error_exit "fdt disabled but some requested targets require it." \
      "You can turn off fdt only if you also disable all the system emulation" \
      "targets which need it (by specifying a cut down --target-list)."
  fi
  fdt=yes
fi

if test "$fdt" != "no" ; then
  fdt_libs="-lfdt"
  # explicitly check for libfdt_env.h as it is missing in some stable installs
  # and test for required functions to make sure we are on a version >= 1.4.2
  cat > $TMPC << EOF
#include <libfdt.h>
#include <libfdt_env.h>
int main(void) { fdt_check_full(NULL, 0); return 0; }
EOF
  if compile_prog "" "$fdt_libs" ; then
    # system DTC is good - use it
    fdt=system
  else
      # have GIT checkout, so activate dtc submodule
      if test -e "${source_path}/.git" ; then
          git_submodules="${git_submodules} dtc"
      fi
      if test -d "${source_path}/dtc/libfdt" || test -e "${source_path}/.git" ; then
          fdt=git
          mkdir -p dtc
          if [ "$pwd_is_source_path" != "y" ] ; then
              symlink "$source_path/dtc/Makefile" "dtc/Makefile"
              symlink "$source_path/dtc/scripts" "dtc/scripts"
          fi
          fdt_cflags="-I\$(SRC_PATH)/dtc/libfdt"
          fdt_ldflags="-L\$(BUILD_DIR)/dtc/libfdt"
          fdt_libs="$fdt_libs"
      elif test "$fdt" = "yes" ; then
          # Not a git build & no libfdt found, prompt for system install
          error_exit "DTC (libfdt) version >= 1.4.2 not present." \
                     "Please install the DTC (libfdt) devel package"
      else
          # don't have and don't want
          fdt_libs=
          fdt=no
      fi
  fi
fi

libs_softmmu="$libs_softmmu $fdt_libs"

##########################################
# opengl probe (for sdl2, gtk, milkymist-tmu2)

gbm="no"
if $pkg_config gbm; then
    gbm_cflags="$($pkg_config --cflags gbm)"
    gbm_libs="$($pkg_config --libs gbm)"
    gbm="yes"
fi

if test "$opengl" != "no" ; then
  opengl_pkgs="epoxy gbm"
  if $pkg_config $opengl_pkgs; then
    opengl_cflags="$($pkg_config --cflags $opengl_pkgs)"
    opengl_libs="$($pkg_config --libs $opengl_pkgs)"
    opengl=yes
    if test "$gtk" = "yes" && $pkg_config --exists "$gtkpackage >= 3.16"; then
        gtk_gl="yes"
    fi
    QEMU_CFLAGS="$QEMU_CFLAGS $opengl_cflags"
  else
    if test "$opengl" = "yes" ; then
      feature_not_found "opengl" "Please install opengl (mesa) devel pkgs: $opengl_pkgs"
    fi
    opengl_cflags=""
    opengl_libs=""
    opengl=no
  fi
fi

if test "$opengl" = "yes"; then
  cat > $TMPC << EOF
#include <epoxy/egl.h>
#ifndef EGL_MESA_image_dma_buf_export
# error mesa/epoxy lacks support for dmabufs (mesa 10.6+)
#endif
int main(void) { return 0; }
EOF
  if compile_prog "" "" ; then
    opengl_dmabuf=yes
  fi
fi

if test "$opengl" = "yes" && test "$have_x11" = "yes"; then
  for target in $target_list; do
    case $target in
      lm32-softmmu) # milkymist-tmu2 requires X11 and OpenGL
        need_x11=yes
      ;;
    esac
  done
fi

##########################################
# libxml2 probe
if test "$libxml2" != "no" ; then
    if $pkg_config --exists libxml-2.0; then
        libxml2="yes"
        libxml2_cflags=$($pkg_config --cflags libxml-2.0)
        libxml2_libs=$($pkg_config --libs libxml-2.0)
    else
        if test "$libxml2" = "yes"; then
            feature_not_found "libxml2" "Install libxml2 devel"
        fi
        libxml2="no"
    fi
fi

##########################################
# glusterfs probe
if test "$glusterfs" != "no" ; then
  if $pkg_config --atleast-version=3 glusterfs-api; then
    glusterfs="yes"
    glusterfs_cflags=$($pkg_config --cflags glusterfs-api)
    glusterfs_libs=$($pkg_config --libs glusterfs-api)
    if $pkg_config --atleast-version=4 glusterfs-api; then
      glusterfs_xlator_opt="yes"
    fi
    if $pkg_config --atleast-version=5 glusterfs-api; then
      glusterfs_discard="yes"
    fi
    if $pkg_config --atleast-version=6 glusterfs-api; then
      glusterfs_fallocate="yes"
      glusterfs_zerofill="yes"
    fi
    cat > $TMPC << EOF
#include <glusterfs/api/glfs.h>

int
main(void)
{
	/* new glfs_ftruncate() passes two additional args */
	return glfs_ftruncate(NULL, 0, NULL, NULL);
}
EOF
    if compile_prog "$glusterfs_cflags" "$glusterfs_libs" ; then
      glusterfs_ftruncate_has_stat="yes"
    fi
    cat > $TMPC << EOF
#include <glusterfs/api/glfs.h>

/* new glfs_io_cbk() passes two additional glfs_stat structs */
static void
glusterfs_iocb(glfs_fd_t *fd, ssize_t ret, struct glfs_stat *prestat, struct glfs_stat *poststat, void *data)
{}

int
main(void)
{
	glfs_io_cbk iocb = &glusterfs_iocb;
	iocb(NULL, 0 , NULL, NULL, NULL);
	return 0;
}
EOF
    if compile_prog "$glusterfs_cflags" "$glusterfs_libs" ; then
      glusterfs_iocb_has_stat="yes"
    fi
  else
    if test "$glusterfs" = "yes" ; then
      feature_not_found "GlusterFS backend support" \
          "Install glusterfs-api devel >= 3"
    fi
    glusterfs="no"
  fi
fi

# Check for inotify functions when we are building linux-user
# emulator.  This is done because older glibc versions don't
# have syscall stubs for these implemented.  In that case we
# don't provide them even if kernel supports them.
#
inotify=no
cat > $TMPC << EOF
#include <sys/inotify.h>

int
main(void)
{
	/* try to start inotify */
	return inotify_init();
}
EOF
if compile_prog "" "" ; then
  inotify=yes
fi

inotify1=no
cat > $TMPC << EOF
#include <sys/inotify.h>

int
main(void)
{
    /* try to start inotify */
    return inotify_init1(0);
}
EOF
if compile_prog "" "" ; then
  inotify1=yes
fi

# check if pipe2 is there
pipe2=no
cat > $TMPC << EOF
#include <unistd.h>
#include <fcntl.h>

int main(void)
{
    int pipefd[2];
    return pipe2(pipefd, O_CLOEXEC);
}
EOF
if compile_prog "" "" ; then
  pipe2=yes
fi

# check if accept4 is there
accept4=no
cat > $TMPC << EOF
#include <sys/socket.h>
#include <stddef.h>

int main(void)
{
    accept4(0, NULL, NULL, SOCK_CLOEXEC);
    return 0;
}
EOF
if compile_prog "" "" ; then
  accept4=yes
fi

# check if tee/splice is there. vmsplice was added same time.
splice=no
cat > $TMPC << EOF
#include <unistd.h>
#include <fcntl.h>
#include <limits.h>

int main(void)
{
    int len, fd = 0;
    len = tee(STDIN_FILENO, STDOUT_FILENO, INT_MAX, SPLICE_F_NONBLOCK);
    splice(STDIN_FILENO, NULL, fd, NULL, len, SPLICE_F_MOVE);
    return 0;
}
EOF
if compile_prog "" "" ; then
  splice=yes
fi

##########################################
# libnuma probe

if test "$numa" != "no" ; then
  cat > $TMPC << EOF
#include <numa.h>
int main(void) { return numa_available(); }
EOF

  if compile_prog "" "-lnuma" ; then
    numa=yes
    libs_softmmu="-lnuma $libs_softmmu"
  else
    if test "$numa" = "yes" ; then
      feature_not_found "numa" "install numactl devel"
    fi
    numa=no
  fi
fi

if test "$tcmalloc" = "yes" && test "$jemalloc" = "yes" ; then
    echo "ERROR: tcmalloc && jemalloc can't be used at the same time"
    exit 1
fi

# Even if malloc_trim() is available, these non-libc memory allocators
# do not support it.
if test "$tcmalloc" = "yes" || test "$jemalloc" = "yes" ; then
    if test "$malloc_trim" = "yes" ; then
        echo "Disabling malloc_trim with non-libc memory allocator"
    fi
    malloc_trim="no"
fi

#######################################
# malloc_trim

if test "$malloc_trim" != "no" ; then
    cat > $TMPC << EOF
#include <malloc.h>
int main(void) { malloc_trim(0); return 0; }
EOF
    if compile_prog "" "" ; then
        malloc_trim="yes"
    else
        malloc_trim="no"
    fi
fi

##########################################
# tcmalloc probe

if test "$tcmalloc" = "yes" ; then
  cat > $TMPC << EOF
#include <stdlib.h>
int main(void) { malloc(1); return 0; }
EOF

  if compile_prog "" "-ltcmalloc" ; then
    LIBS="-ltcmalloc $LIBS"
  else
    feature_not_found "tcmalloc" "install gperftools devel"
  fi
fi

##########################################
# jemalloc probe

if test "$jemalloc" = "yes" ; then
  cat > $TMPC << EOF
#include <stdlib.h>
int main(void) { malloc(1); return 0; }
EOF

  if compile_prog "" "-ljemalloc" ; then
    LIBS="-ljemalloc $LIBS"
  else
    feature_not_found "jemalloc" "install jemalloc devel"
  fi
fi

##########################################
# signalfd probe
signalfd="no"
cat > $TMPC << EOF
#include <unistd.h>
#include <sys/syscall.h>
#include <signal.h>
int main(void) { return syscall(SYS_signalfd, -1, NULL, _NSIG / 8); }
EOF

if compile_prog "" "" ; then
  signalfd=yes
fi

# check if optreset global is declared by <getopt.h>
optreset="no"
cat > $TMPC << EOF
#include <getopt.h>
int main(void) { return optreset; }
EOF

if compile_prog "" "" ; then
  optreset=yes
fi

# check if eventfd is supported
eventfd=no
cat > $TMPC << EOF
#include <sys/eventfd.h>

int main(void)
{
    return eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
}
EOF
if compile_prog "" "" ; then
  eventfd=yes
fi

# check if memfd is supported
memfd=no
cat > $TMPC << EOF
#include <sys/mman.h>

int main(void)
{
    return memfd_create("foo", MFD_ALLOW_SEALING);
}
EOF
if compile_prog "" "" ; then
  memfd=yes
fi

# check for usbfs
have_usbfs=no
if test "$linux_user" = "yes"; then
  cat > $TMPC << EOF
#include <linux/usbdevice_fs.h>

#ifndef USBDEVFS_GET_CAPABILITIES
#error "USBDEVFS_GET_CAPABILITIES undefined"
#endif

#ifndef USBDEVFS_DISCONNECT_CLAIM
#error "USBDEVFS_DISCONNECT_CLAIM undefined"
#endif

int main(void)
{
    return 0;
}
EOF
  if compile_prog "" ""; then
    have_usbfs=yes
  fi
fi

# check for fallocate
fallocate=no
cat > $TMPC << EOF
#include <fcntl.h>

int main(void)
{
    fallocate(0, 0, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  fallocate=yes
fi

# check for fallocate hole punching
fallocate_punch_hole=no
cat > $TMPC << EOF
#include <fcntl.h>
#include <linux/falloc.h>

int main(void)
{
    fallocate(0, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  fallocate_punch_hole=yes
fi

# check that fallocate supports range zeroing inside the file
fallocate_zero_range=no
cat > $TMPC << EOF
#include <fcntl.h>
#include <linux/falloc.h>

int main(void)
{
    fallocate(0, FALLOC_FL_ZERO_RANGE, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  fallocate_zero_range=yes
fi

# check for posix_fallocate
posix_fallocate=no
cat > $TMPC << EOF
#include <fcntl.h>

int main(void)
{
    posix_fallocate(0, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
    posix_fallocate=yes
fi

# check for sync_file_range
sync_file_range=no
cat > $TMPC << EOF
#include <fcntl.h>

int main(void)
{
    sync_file_range(0, 0, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  sync_file_range=yes
fi

# check for linux/fiemap.h and FS_IOC_FIEMAP
fiemap=no
cat > $TMPC << EOF
#include <sys/ioctl.h>
#include <linux/fs.h>
#include <linux/fiemap.h>

int main(void)
{
    ioctl(0, FS_IOC_FIEMAP, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  fiemap=yes
fi

# check for dup3
dup3=no
cat > $TMPC << EOF
#include <unistd.h>

int main(void)
{
    dup3(0, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  dup3=yes
fi

# check for ppoll support
ppoll=no
cat > $TMPC << EOF
#include <poll.h>

int main(void)
{
    struct pollfd pfd = { .fd = 0, .events = 0, .revents = 0 };
    ppoll(&pfd, 1, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  ppoll=yes
fi

# check for prctl(PR_SET_TIMERSLACK , ... ) support
prctl_pr_set_timerslack=no
cat > $TMPC << EOF
#include <sys/prctl.h>

int main(void)
{
    prctl(PR_SET_TIMERSLACK, 1, 0, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  prctl_pr_set_timerslack=yes
fi

# check for epoll support
epoll=no
cat > $TMPC << EOF
#include <sys/epoll.h>

int main(void)
{
    epoll_create(0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  epoll=yes
fi

# epoll_create1 is a later addition
# so we must check separately for its presence
epoll_create1=no
cat > $TMPC << EOF
#include <sys/epoll.h>

int main(void)
{
    /* Note that we use epoll_create1 as a value, not as
     * a function being called. This is necessary so that on
     * old SPARC glibc versions where the function was present in
     * the library but not declared in the header file we will
     * fail the configure check. (Otherwise we will get a compiler
     * warning but not an error, and will proceed to fail the
     * qemu compile where we compile with -Werror.)
     */
    return (int)(uintptr_t)&epoll_create1;
}
EOF
if compile_prog "" "" ; then
  epoll_create1=yes
fi

# check for sendfile support
sendfile=no
cat > $TMPC << EOF
#include <sys/sendfile.h>

int main(void)
{
    return sendfile(0, 0, 0, 0);
}
EOF
if compile_prog "" "" ; then
  sendfile=yes
fi

# check for timerfd support (glibc 2.8 and newer)
timerfd=no
cat > $TMPC << EOF
#include <sys/timerfd.h>

int main(void)
{
    return(timerfd_create(CLOCK_REALTIME, 0));
}
EOF
if compile_prog "" "" ; then
  timerfd=yes
fi

# check for setns and unshare support
setns=no
cat > $TMPC << EOF
#include <sched.h>

int main(void)
{
    int ret;
    ret = setns(0, 0);
    ret = unshare(0);
    return ret;
}
EOF
if compile_prog "" "" ; then
  setns=yes
fi

# clock_adjtime probe
clock_adjtime=no
cat > $TMPC <<EOF
#include <time.h>

int main(void)
{
    return clock_adjtime(0, 0);
}
EOF
clock_adjtime=no
if compile_prog "" "" ; then
  clock_adjtime=yes
fi

# syncfs probe
syncfs=no
cat > $TMPC <<EOF
#include <unistd.h>

int main(void)
{
    return syncfs(0);
}
EOF
syncfs=no
if compile_prog "" "" ; then
  syncfs=yes
fi

# Check we have a new enough version of sphinx-build
has_sphinx_build() {
    # This is a bit awkward but works: create a trivial document and
    # try to run it with our configuration file (which enforces a
    # version requirement). This will fail if either
    # sphinx-build doesn't exist at all or if it is too old.
    mkdir -p "$TMPDIR1/sphinx"
    touch "$TMPDIR1/sphinx/index.rst"
    sphinx-build -c "$source_path/docs" -b html "$TMPDIR1/sphinx" "$TMPDIR1/sphinx/out" >/dev/null 2>&1
}

# Check if tools are available to build documentation.
if test "$docs" != "no" ; then
  if has makeinfo && has pod2man && has_sphinx_build; then
    docs=yes
  else
    if test "$docs" = "yes" ; then
      feature_not_found "docs" "Install texinfo, Perl/perl-podlators and python-sphinx"
    fi
    docs=no
  fi
fi

# Search for bswap_32 function
byteswap_h=no
cat > $TMPC << EOF
#include <byteswap.h>
int main(void) { return bswap_32(0); }
EOF
if compile_prog "" "" ; then
  byteswap_h=yes
fi

# Search for bswap32 function
bswap_h=no
cat > $TMPC << EOF
#include <sys/endian.h>
#include <sys/types.h>
#include <machine/bswap.h>
int main(void) { return bswap32(0); }
EOF
if compile_prog "" "" ; then
  bswap_h=yes
fi

##########################################
# Do we have libiscsi >= 1.9.0
if test "$libiscsi" != "no" ; then
  if $pkg_config --atleast-version=1.9.0 libiscsi; then
    libiscsi="yes"
    libiscsi_cflags=$($pkg_config --cflags libiscsi)
    libiscsi_libs=$($pkg_config --libs libiscsi)
  else
    if test "$libiscsi" = "yes" ; then
      feature_not_found "libiscsi" "Install libiscsi >= 1.9.0"
    fi
    libiscsi="no"
  fi
fi

##########################################
# Do we need libm
cat > $TMPC << EOF
#include <math.h>
int main(int argc, char **argv) { return isnan(sin((double)argc)); }
EOF
if compile_prog "" "" ; then
  :
elif compile_prog "" "-lm" ; then
  LIBS="-lm $LIBS"
  libs_qga="-lm $libs_qga"
else
  error_exit "libm check failed"
fi

##########################################
# Do we need librt
# uClibc provides 2 versions of clock_gettime(), one with realtime
# support and one without. This means that the clock_gettime() don't
# need -lrt. We still need it for timer_create() so we check for this
# function in addition.
cat > $TMPC <<EOF
#include <signal.h>
#include <time.h>
int main(void) {
  timer_create(CLOCK_REALTIME, NULL, NULL);
  return clock_gettime(CLOCK_REALTIME, NULL);
}
EOF

if compile_prog "" "" ; then
  :
# we need pthread for static linking. use previous pthread test result
elif compile_prog "" "$pthread_lib -lrt" ; then
  LIBS="$LIBS -lrt"
  libs_qga="$libs_qga -lrt"
fi

# Check whether we need to link libutil for openpty()
cat > $TMPC << EOF
extern int openpty(int *am, int *as, char *name, void *termp, void *winp);
int main(void) { return openpty(0, 0, 0, 0, 0); }
EOF

if ! compile_prog "" "" ; then
  if compile_prog "" "-lutil" ; then
    libs_softmmu="-lutil $libs_softmmu"
    libs_tools="-lutil $libs_tools"
  fi
fi

##########################################
# spice probe
if test "$spice" != "no" ; then
  cat > $TMPC << EOF
#include <spice.h>
int main(void) { spice_server_new(); return 0; }
EOF
  spice_cflags=$($pkg_config --cflags spice-protocol spice-server 2>/dev/null)
  spice_libs=$($pkg_config --libs spice-protocol spice-server 2>/dev/null)
  if $pkg_config --atleast-version=0.12.5 spice-server && \
     $pkg_config --atleast-version=0.12.3 spice-protocol && \
     compile_prog "$spice_cflags" "$spice_libs" ; then
    spice="yes"
    libs_softmmu="$libs_softmmu $spice_libs"
    QEMU_CFLAGS="$QEMU_CFLAGS $spice_cflags"
    spice_protocol_version=$($pkg_config --modversion spice-protocol)
    spice_server_version=$($pkg_config --modversion spice-server)
  else
    if test "$spice" = "yes" ; then
      feature_not_found "spice" \
          "Install spice-server(>=0.12.5) and spice-protocol(>=0.12.3) devel"
    fi
    spice="no"
  fi
fi

# check for smartcard support
if test "$smartcard" != "no"; then
    if $pkg_config --atleast-version=2.5.1 libcacard; then
        libcacard_cflags=$($pkg_config --cflags libcacard)
        libcacard_libs=$($pkg_config --libs libcacard)
        smartcard="yes"
    else
        if test "$smartcard" = "yes"; then
            feature_not_found "smartcard" "Install libcacard devel"
        fi
        smartcard="no"
    fi
fi

# check for libusb
if test "$libusb" != "no" ; then
    if $pkg_config --atleast-version=1.0.13 libusb-1.0; then
        libusb="yes"
        libusb_cflags=$($pkg_config --cflags libusb-1.0)
        libusb_libs=$($pkg_config --libs libusb-1.0)
    else
        if test "$libusb" = "yes"; then
            feature_not_found "libusb" "Install libusb devel >= 1.0.13"
        fi
        libusb="no"
    fi
fi

# check for usbredirparser for usb network redirection support
if test "$usb_redir" != "no" ; then
    if $pkg_config --atleast-version=0.6 libusbredirparser-0.5; then
        usb_redir="yes"
        usb_redir_cflags=$($pkg_config --cflags libusbredirparser-0.5)
        usb_redir_libs=$($pkg_config --libs libusbredirparser-0.5)
    else
        if test "$usb_redir" = "yes"; then
            feature_not_found "usb-redir" "Install usbredir devel"
        fi
        usb_redir="no"
    fi
fi

##########################################
# check if we have VSS SDK headers for win

if test "$mingw32" = "yes" && test "$guest_agent" != "no" && \
        test "$vss_win32_sdk" != "no" ; then
  case "$vss_win32_sdk" in
    "")   vss_win32_include="-isystem $source_path" ;;
    *\ *) # The SDK is installed in "Program Files" by default, but we cannot
          # handle path with spaces. So we symlink the headers into ".sdk/vss".
          vss_win32_include="-isystem $source_path/.sdk/vss"
	  symlink "$vss_win32_sdk/inc" "$source_path/.sdk/vss/inc"
	  ;;
    *)    vss_win32_include="-isystem $vss_win32_sdk"
  esac
  cat > $TMPC << EOF
#define __MIDL_user_allocate_free_DEFINED__
#include <inc/win2003/vss.h>
int main(void) { return VSS_CTX_BACKUP; }
EOF
  if compile_prog "$vss_win32_include" "" ; then
    guest_agent_with_vss="yes"
    QEMU_CFLAGS="$QEMU_CFLAGS $vss_win32_include"
    libs_qga="-lole32 -loleaut32 -lshlwapi -lstdc++ -Wl,--enable-stdcall-fixup $libs_qga"
    qga_vss_provider="qga/vss-win32/qga-vss.dll qga/vss-win32/qga-vss.tlb"
  else
    if test "$vss_win32_sdk" != "" ; then
      echo "ERROR: Please download and install Microsoft VSS SDK:"
      echo "ERROR:   http://www.microsoft.com/en-us/download/details.aspx?id=23490"
      echo "ERROR: On POSIX-systems, you can extract the SDK headers by:"
      echo "ERROR:   scripts/extract-vsssdk-headers setup.exe"
      echo "ERROR: The headers are extracted in the directory \`inc'."
      feature_not_found "VSS support"
    fi
    guest_agent_with_vss="no"
  fi
fi

##########################################
# lookup Windows platform SDK (if not specified)
# The SDK is needed only to build .tlb (type library) file of guest agent
# VSS provider from the source. It is usually unnecessary because the
# pre-compiled .tlb file is included.

if test "$mingw32" = "yes" && test "$guest_agent" != "no" && \
        test "$guest_agent_with_vss" = "yes" ; then
  if test -z "$win_sdk"; then
    programfiles="$PROGRAMFILES"
    test -n "$PROGRAMW6432" && programfiles="$PROGRAMW6432"
    if test -n "$programfiles"; then
      win_sdk=$(ls -d "$programfiles/Microsoft SDKs/Windows/v"* | tail -1) 2>/dev/null
    else
      feature_not_found "Windows SDK"
    fi
  elif test "$win_sdk" = "no"; then
    win_sdk=""
  fi
fi

##########################################
# check if mingw environment provides a recent ntddscsi.h
if test "$mingw32" = "yes" && test "$guest_agent" != "no"; then
  cat > $TMPC << EOF
#include <windows.h>
#include <ntddscsi.h>
int main(void) {
#if !defined(IOCTL_SCSI_GET_ADDRESS)
#error Missing required ioctl definitions
#endif
  SCSI_ADDRESS addr = { .Lun = 0, .TargetId = 0, .PathId = 0 };
  return addr.Lun;
}
EOF
  if compile_prog "" "" ; then
    guest_agent_ntddscsi=yes
    libs_qga="-lsetupapi -lcfgmgr32 $libs_qga"
  fi
fi

##########################################
# virgl renderer probe

if test "$virglrenderer" != "no" ; then
  cat > $TMPC << EOF
#include <virglrenderer.h>
int main(void) { virgl_renderer_poll(); return 0; }
EOF
  virgl_cflags=$($pkg_config --cflags virglrenderer 2>/dev/null)
  virgl_libs=$($pkg_config --libs virglrenderer 2>/dev/null)
  virgl_version=$($pkg_config --modversion virglrenderer 2>/dev/null)
  if $pkg_config virglrenderer >/dev/null 2>&1 && \
     compile_prog "$virgl_cflags" "$virgl_libs" ; then
    virglrenderer="yes"
  else
    if test "$virglrenderer" = "yes" ; then
      feature_not_found "virglrenderer"
    fi
    virglrenderer="no"
  fi
fi

##########################################
# capstone

case "$capstone" in
  "" | yes)
    if $pkg_config capstone; then
      capstone=system
    elif test -e "${source_path}/.git" && test $git_update = 'yes' ; then
      capstone=git
    elif test -e "${source_path}/capstone/Makefile" ; then
      capstone=internal
    elif test -z "$capstone" ; then
      capstone=no
    else
      feature_not_found "capstone" "Install capstone devel or git submodule"
    fi
    ;;

  system)
    if ! $pkg_config capstone; then
      feature_not_found "capstone" "Install capstone devel"
    fi
    ;;
esac

case "$capstone" in
  git | internal)
    if test "$capstone" = git; then
      git_submodules="${git_submodules} capstone"
    fi
    mkdir -p capstone
    QEMU_CFLAGS="$QEMU_CFLAGS -I\$(SRC_PATH)/capstone/include"
    if test "$mingw32" = "yes"; then
      LIBCAPSTONE=capstone.lib
    else
      LIBCAPSTONE=libcapstone.a
    fi
    libs_cpu="-L\$(BUILD_DIR)/capstone -lcapstone $libs_cpu"
    ;;

  system)
    QEMU_CFLAGS="$QEMU_CFLAGS $($pkg_config --cflags capstone)"
    libs_cpu="$($pkg_config --libs capstone) $libs_cpu"
    ;;

  no)
    ;;
  *)
    error_exit "Unknown state for capstone: $capstone"
    ;;
esac

##########################################
# check if we have fdatasync

fdatasync=no
cat > $TMPC << EOF
#include <unistd.h>
int main(void) {
#if defined(_POSIX_SYNCHRONIZED_IO) && _POSIX_SYNCHRONIZED_IO > 0
return fdatasync(0);
#else
#error Not supported
#endif
}
EOF
if compile_prog "" "" ; then
    fdatasync=yes
fi

##########################################
# check if we have madvise

madvise=no
cat > $TMPC << EOF
#include <sys/types.h>
#include <sys/mman.h>
#include <stddef.h>
int main(void) { return madvise(NULL, 0, MADV_DONTNEED); }
EOF
if compile_prog "" "" ; then
    madvise=yes
fi

##########################################
# check if we have posix_madvise

posix_madvise=no
cat > $TMPC << EOF
#include <sys/mman.h>
#include <stddef.h>
int main(void) { return posix_madvise(NULL, 0, POSIX_MADV_DONTNEED); }
EOF
if compile_prog "" "" ; then
    posix_madvise=yes
fi

##########################################
# check if we have posix_memalign()

posix_memalign=no
cat > $TMPC << EOF
#include <stdlib.h>
int main(void) {
    void *p;
    return posix_memalign(&p, 8, 8);
}
EOF
if compile_prog "" "" ; then
    posix_memalign=yes
fi

##########################################
# check if we have posix_syslog

posix_syslog=no
cat > $TMPC << EOF
#include <syslog.h>
int main(void) { openlog("qemu", LOG_PID, LOG_DAEMON); syslog(LOG_INFO, "configure"); return 0; }
EOF
if compile_prog "" "" ; then
    posix_syslog=yes
fi

##########################################
# check if we have sem_timedwait

sem_timedwait=no
cat > $TMPC << EOF
#include <semaphore.h>
int main(void) { sem_t s; struct timespec t = {0}; return sem_timedwait(&s, &t); }
EOF
if compile_prog "" "" ; then
    sem_timedwait=yes
fi

##########################################
# check if we have strchrnul

strchrnul=no
cat > $TMPC << EOF
#include <string.h>
int main(void);
// Use a haystack that the compiler shouldn't be able to constant fold
char *haystack = (char*)&main;
int main(void) { return strchrnul(haystack, 'x') != &haystack[6]; }
EOF
if compile_prog "" "" ; then
    strchrnul=yes
fi

##########################################
# check if trace backend exists

$python "$source_path/scripts/tracetool.py" "--backends=$trace_backends" --check-backends  > /dev/null 2> /dev/null
if test "$?" -ne 0 ; then
  error_exit "invalid trace backends" \
      "Please choose supported trace backends."
fi

##########################################
# For 'ust' backend, test if ust headers are present
if have_backend "ust"; then
  cat > $TMPC << EOF
#include <lttng/tracepoint.h>
int main(void) { return 0; }
EOF
  if compile_prog "" "-Wl,--no-as-needed -ldl" ; then
    if $pkg_config lttng-ust --exists; then
      lttng_ust_libs=$($pkg_config --libs lttng-ust)
    else
      lttng_ust_libs="-llttng-ust -ldl"
    fi
    if $pkg_config liburcu-bp --exists; then
      urcu_bp_libs=$($pkg_config --libs liburcu-bp)
    else
      urcu_bp_libs="-lurcu-bp"
    fi

    LIBS="$lttng_ust_libs $urcu_bp_libs $LIBS"
    libs_qga="$lttng_ust_libs $urcu_bp_libs $libs_qga"
  else
    error_exit "Trace backend 'ust' missing lttng-ust header files"
  fi
fi

##########################################
# For 'dtrace' backend, test if 'dtrace' command is present
if have_backend "dtrace"; then
  if ! has 'dtrace' ; then
    error_exit "dtrace command is not found in PATH $PATH"
  fi
  trace_backend_stap="no"
  if has 'stap' ; then
    trace_backend_stap="yes"
  fi
fi

##########################################
# check and set a backend for coroutine

# We prefer ucontext, but it's not always possible. The fallback
# is sigcontext. On Windows the only valid backend is the Windows
# specific one.

ucontext_works=no
if test "$darwin" != "yes"; then
  cat > $TMPC << EOF
#include <ucontext.h>
#ifdef __stub_makecontext
#error Ignoring glibc stub makecontext which will always fail
#endif
int main(void) { makecontext(0, 0, 0); return 0; }
EOF
  if compile_prog "" "" ; then
    ucontext_works=yes
  fi
fi

if test "$coroutine" = ""; then
  if test "$mingw32" = "yes"; then
    coroutine=win32
  elif test "$ucontext_works" = "yes"; then
    coroutine=ucontext
  else
    coroutine=sigaltstack
  fi
else
  case $coroutine in
  windows)
    if test "$mingw32" != "yes"; then
      error_exit "'windows' coroutine backend only valid for Windows"
    fi
    # Unfortunately the user visible backend name doesn't match the
    # coroutine-*.c filename for this case, so we have to adjust it here.
    coroutine=win32
    ;;
  ucontext)
    if test "$ucontext_works" != "yes"; then
      feature_not_found "ucontext"
    fi
    ;;
  sigaltstack)
    if test "$mingw32" = "yes"; then
      error_exit "only the 'windows' coroutine backend is valid for Windows"
    fi
    ;;
  *)
    error_exit "unknown coroutine backend $coroutine"
    ;;
  esac
fi

if test "$coroutine_pool" = ""; then
  coroutine_pool=yes
fi

if test "$debug_stack_usage" = "yes"; then
  if test "$coroutine_pool" = "yes"; then
    echo "WARN: disabling coroutine pool for stack usage debugging"
    coroutine_pool=no
  fi
fi


##########################################
# check if we have open_by_handle_at

open_by_handle_at=no
cat > $TMPC << EOF
#include <fcntl.h>
#if !defined(AT_EMPTY_PATH)
# error missing definition
#else
int main(void) { struct file_handle fh; return open_by_handle_at(0, &fh, 0); }
#endif
EOF
if compile_prog "" "" ; then
    open_by_handle_at=yes
fi

########################################
# check if we have linux/magic.h

linux_magic_h=no
cat > $TMPC << EOF
#include <linux/magic.h>
int main(void) {
  return 0;
}
EOF
if compile_prog "" "" ; then
    linux_magic_h=yes
fi

########################################
# check whether we can disable warning option with a pragma (this is needed
# to silence warnings in the headers of some versions of external libraries).
# This test has to be compiled with -Werror as otherwise an unknown pragma is
# only a warning.
#
# If we can't selectively disable warning in the code, disable -Werror so that
# the build doesn't fail anyway.

pragma_disable_unused_but_set=no
cat > $TMPC << EOF
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wstrict-prototypes"
#pragma GCC diagnostic pop

int main(void) {
    return 0;
}
EOF
if compile_prog "-Werror" "" ; then
    pragma_diagnostic_available=yes
else
    werror=no
fi

########################################
# check if we have valgrind/valgrind.h

valgrind_h=no
cat > $TMPC << EOF
#include <valgrind/valgrind.h>
int main(void) {
  return 0;
}
EOF
if compile_prog "" "" ; then
    valgrind_h=yes
fi

########################################
# check if environ is declared

has_environ=no
cat > $TMPC << EOF
#include <unistd.h>
int main(void) {
    environ = 0;
    return 0;
}
EOF
if compile_prog "" "" ; then
    has_environ=yes
fi

########################################
# check if cpuid.h is usable.

cat > $TMPC << EOF
#include <cpuid.h>
int main(void) {
    unsigned a, b, c, d;
    int max = __get_cpuid_max(0, 0);

    if (max >= 1) {
        __cpuid(1, a, b, c, d);
    }

    if (max >= 7) {
        __cpuid_count(7, 0, a, b, c, d);
    }

    return 0;
}
EOF
if compile_prog "" "" ; then
    cpuid_h=yes
fi

##########################################
# avx2 optimization requirement check
#
# There is no point enabling this if cpuid.h is not usable,
# since we won't be able to select the new routines.

if test "$cpuid_h" = "yes" && test "$avx2_opt" != "no"; then
  cat > $TMPC << EOF
#pragma GCC push_options
#pragma GCC target("avx2")
#include <cpuid.h>
#include <immintrin.h>
static int bar(void *a) {
    __m256i x = *(__m256i *)a;
    return _mm256_testz_si256(x, x);
}
int main(int argc, char *argv[]) { return bar(argv[0]); }
EOF
  if compile_object "" ; then
    avx2_opt="yes"
  else
    avx2_opt="no"
  fi
fi

########################################
# check if __[u]int128_t is usable.

int128=no
cat > $TMPC << EOF
__int128_t a;
__uint128_t b;
int main (void) {
  a = a + b;
  b = a * b;
  a = a * a;
  return 0;
}
EOF
if compile_prog "" "" ; then
    int128=yes
fi

#########################################
# See if 128-bit atomic operations are supported.

atomic128=no
if test "$int128" = "yes"; then
  cat > $TMPC << EOF
int main(void)
{
  unsigned __int128 x = 0, y = 0;
  y = __atomic_load_16(&x, 0);
  __atomic_store_16(&x, y, 0);
  __atomic_compare_exchange_16(&x, &y, x, 0, 0, 0);
  return 0;
}
EOF
  if compile_prog "" "" ; then
    atomic128=yes
  fi
fi

cmpxchg128=no
if test "$int128" = yes && test "$atomic128" = no; then
  cat > $TMPC << EOF
int main(void)
{
  unsigned __int128 x = 0, y = 0;
  __sync_val_compare_and_swap_16(&x, y, x);
  return 0;
}
EOF
  if compile_prog "" "" ; then
    cmpxchg128=yes
  fi
fi

#########################################
# See if 64-bit atomic operations are supported.
# Note that without __atomic builtins, we can only
# assume atomic loads/stores max at pointer size.

cat > $TMPC << EOF
#include <stdint.h>
int main(void)
{
  uint64_t x = 0, y = 0;
#ifdef __ATOMIC_RELAXED
  y = __atomic_load_8(&x, 0);
  __atomic_store_8(&x, y, 0);
  __atomic_compare_exchange_8(&x, &y, x, 0, 0, 0);
  __atomic_exchange_8(&x, y, 0);
  __atomic_fetch_add_8(&x, y, 0);
#else
  typedef char is_host64[sizeof(void *) >= sizeof(uint64_t) ? 1 : -1];
  __sync_lock_test_and_set(&x, y);
  __sync_val_compare_and_swap(&x, y, 0);
  __sync_fetch_and_add(&x, y);
#endif
  return 0;
}
EOF
if compile_prog "" "" ; then
  atomic64=yes
fi

#########################################
# See if --dynamic-list is supported by the linker
ld_dynamic_list="no"
if test "$static" = "no" ; then
    cat > $TMPTXT <<EOF
{
  foo;
};
EOF

    cat > $TMPC <<EOF
#include <stdio.h>
void foo(void);

void foo(void)
{
  printf("foo\n");
}

int main(void)
{
  foo();
  return 0;
}
EOF

    if compile_prog "" "-Wl,--dynamic-list=$TMPTXT" ; then
        ld_dynamic_list="yes"
    fi
fi

#########################################
# See if -exported_symbols_list is supported by the linker

ld_exported_symbols_list="no"
if test "$static" = "no" ; then
    cat > $TMPTXT <<EOF
  _foo
EOF

    if compile_prog "" "-Wl,-exported_symbols_list,$TMPTXT" ; then
        ld_exported_symbols_list="yes"
    fi
fi

if  test "$plugins" = "yes" &&
    test "$ld_dynamic_list" = "no" &&
    test "$ld_exported_symbols_list" = "no" ; then
  error_exit \
      "Plugin support requires dynamic linking and specifying a set of symbols " \
      "that are exported to plugins. Unfortunately your linker doesn't " \
      "support the flag (--dynamic-list or -exported_symbols_list) used " \
      "for this purpose. You can't build with --static."
fi

########################################
# See if 16-byte vector operations are supported.
# Even without a vector unit the compiler may expand these.
# There is a bug in old GCC for PPC that crashes here.
# Unfortunately it's the system compiler for Centos 7.

cat > $TMPC << EOF
typedef unsigned char U1 __attribute__((vector_size(16)));
typedef unsigned short U2 __attribute__((vector_size(16)));
typedef unsigned int U4 __attribute__((vector_size(16)));
typedef unsigned long long U8 __attribute__((vector_size(16)));
typedef signed char S1 __attribute__((vector_size(16)));
typedef signed short S2 __attribute__((vector_size(16)));
typedef signed int S4 __attribute__((vector_size(16)));
typedef signed long long S8 __attribute__((vector_size(16)));
static U1 a1, b1;
static U2 a2, b2;
static U4 a4, b4;
static U8 a8, b8;
static S1 c1;
static S2 c2;
static S4 c4;
static S8 c8;
static int i;
void helper(void *d, void *a, int shift, int i);
void helper(void *d, void *a, int shift, int i)
{
  *(U1 *)(d + i) = *(U1 *)(a + i) << shift;
  *(U2 *)(d + i) = *(U2 *)(a + i) << shift;
  *(U4 *)(d + i) = *(U4 *)(a + i) << shift;
  *(U8 *)(d + i) = *(U8 *)(a + i) << shift;
}
int main(void)
{
  a1 += b1; a2 += b2; a4 += b4; a8 += b8;
  a1 -= b1; a2 -= b2; a4 -= b4; a8 -= b8;
  a1 *= b1; a2 *= b2; a4 *= b4; a8 *= b8;
  a1 &= b1; a2 &= b2; a4 &= b4; a8 &= b8;
  a1 |= b1; a2 |= b2; a4 |= b4; a8 |= b8;
  a1 ^= b1; a2 ^= b2; a4 ^= b4; a8 ^= b8;
  a1 <<= i; a2 <<= i; a4 <<= i; a8 <<= i;
  a1 >>= i; a2 >>= i; a4 >>= i; a8 >>= i;
  c1 >>= i; c2 >>= i; c4 >>= i; c8 >>= i;
  return 0;
}
EOF

vector16=no
if compile_prog "" "" ; then
  vector16=yes
fi

########################################
# See if __attribute__((alias)) is supported.
# This false for Xcode 9, but has been remedied for Xcode 10.
# Unfortunately, travis uses Xcode 9 by default.

attralias=no
cat > $TMPC << EOF
int x = 1;
extern const int y __attribute__((alias("x")));
int main(void) { return 0; }
EOF
if compile_prog "" "" ; then
    attralias=yes
fi

########################################
# check if getauxval is available.

getauxval=no
cat > $TMPC << EOF
#include <sys/auxv.h>
int main(void) {
  return getauxval(AT_HWCAP) == 0;
}
EOF
if compile_prog "" "" ; then
    getauxval=yes
fi

########################################
# check if ccache is interfering with
# semantic analysis of macros

unset CCACHE_CPP2
ccache_cpp2=no
cat > $TMPC << EOF
static const int Z = 1;
#define fn() ({ Z; })
#define TAUT(X) ((X) == Z)
#define PAREN(X, Y) (X == Y)
#define ID(X) (X)
int main(int argc, char *argv[])
{
    int x = 0, y = 0;
    x = ID(x);
    x = fn();
    fn();
    if (PAREN(x, y)) return 0;
    if (TAUT(Z)) return 0;
    return 0;
}
EOF

if ! compile_object "-Werror"; then
    ccache_cpp2=yes
fi

#################################################
# clang does not support glibc + FORTIFY_SOURCE.

if test "$fortify_source" != "no"; then
  if echo | $cc -dM -E - | grep __clang__ > /dev/null 2>&1 ; then
    fortify_source="no";
  elif test -n "$cxx" && has $cxx &&
       echo | $cxx -dM -E - | grep __clang__ >/dev/null 2>&1 ; then
    fortify_source="no";
  else
    fortify_source="yes"
  fi
fi

###############################################
# Check if copy_file_range is provided by glibc
have_copy_file_range=no
cat > $TMPC << EOF
#include <unistd.h>
int main(void) {
  copy_file_range(0, NULL, 0, NULL, 0, 0);
  return 0;
}
EOF
if compile_prog "" "" ; then
    have_copy_file_range=yes
fi

##########################################
# check if struct fsxattr is available via linux/fs.h

have_fsxattr=no
cat > $TMPC << EOF
#include <linux/fs.h>
struct fsxattr foo;
int main(void) {
  return 0;
}
EOF
if compile_prog "" "" ; then
    have_fsxattr=yes
fi

##########################################
# check for usable membarrier system call
if test "$membarrier" = "yes"; then
    have_membarrier=no
    if test "$mingw32" = "yes" ; then
        have_membarrier=yes
    elif test "$linux" = "yes" ; then
        cat > $TMPC << EOF
    #include <linux/membarrier.h>
    #include <sys/syscall.h>
    #include <unistd.h>
    #include <stdlib.h>
    int main(void) {
        syscall(__NR_membarrier, MEMBARRIER_CMD_QUERY, 0);
        syscall(__NR_membarrier, MEMBARRIER_CMD_SHARED, 0);
	exit(0);
    }
EOF
        if compile_prog "" "" ; then
            have_membarrier=yes
        fi
    fi
    if test "$have_membarrier" = "no"; then
      feature_not_found "membarrier" "membarrier system call not available"
    fi
else
    # Do not enable it by default even for Mingw32, because it doesn't
    # work on Wine.
    membarrier=no
fi

##########################################
# check if rtnetlink.h exists and is useful
have_rtnetlink=no
cat > $TMPC << EOF
#include <linux/rtnetlink.h>
int main(void) {
  return IFLA_PROTO_DOWN;
}
EOF
if compile_prog "" "" ; then
    have_rtnetlink=yes
fi

##########################################
# check for usable AF_VSOCK environment
have_af_vsock=no
cat > $TMPC << EOF
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#if !defined(AF_VSOCK)
# error missing AF_VSOCK flag
#endif
#include <linux/vm_sockets.h>
int main(void) {
    int sock, ret;
    struct sockaddr_vm svm;
    socklen_t len = sizeof(svm);
    sock = socket(AF_VSOCK, SOCK_STREAM, 0);
    ret = getpeername(sock, (struct sockaddr *)&svm, &len);
    if ((ret == -1) && (errno == ENOTCONN)) {
        return 0;
    }
    return -1;
}
EOF
if compile_prog "" "" ; then
    have_af_vsock=yes
fi

##########################################
# check for usable AF_ALG environment
hava_afalg=no
cat > $TMPC << EOF
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <linux/if_alg.h>
int main(void) {
    int sock;
    sock = socket(AF_ALG, SOCK_SEQPACKET, 0);
    return sock;
}
EOF
if compile_prog "" "" ; then
    have_afalg=yes
fi
if test "$crypto_afalg" = "yes"
then
    if test "$have_afalg" != "yes"
    then
	error_exit "AF_ALG requested but could not be detected"
    fi
fi


#################################################
# Check to see if we have the Hypervisor framework
if [ "$darwin" = "yes" ] ; then
  cat > $TMPC << EOF
#include <Hypervisor/hv.h>
int main() { return 0;}
EOF
  if ! compile_object ""; then
    hvf='no'
  else
    hvf='yes'
    LDFLAGS="-framework Hypervisor $LDFLAGS"
  fi
fi

#################################################
# Sparc implicitly links with --relax, which is
# incompatible with -r, so --no-relax should be
# given. It does no harm to give it on other
# platforms too.

# Note: the prototype is needed since QEMU_CFLAGS
#       contains -Wmissing-prototypes
cat > $TMPC << EOF
extern int foo(void);
int foo(void) { return 0; }
EOF
if ! compile_object ""; then
  error_exit "Failed to compile object file for LD_REL_FLAGS test"
fi
for i in '-Wl,-r -Wl,--no-relax' -Wl,-r -r; do
  if do_cc -nostdlib $i -o $TMPMO $TMPO; then
    LD_REL_FLAGS=$i
    break
  fi
done
if test "$modules" = "yes" && test "$LD_REL_FLAGS" = ""; then
  feature_not_found "modules" "Cannot find how to build relocatable objects"
fi

##########################################
# check for sysmacros.h

have_sysmacros=no
cat > $TMPC << EOF
#include <sys/sysmacros.h>
int main(void) {
    return makedev(0, 0);
}
EOF
if compile_prog "" "" ; then
    have_sysmacros=yes
fi

##########################################
# Veritas HyperScale block driver VxHS
# Check if libvxhs is installed

if test "$vxhs" != "no" ; then
  cat > $TMPC <<EOF
#include <stdint.h>
#include <qnio/qnio_api.h>

void *vxhs_callback;

int main(void) {
    iio_init(QNIO_VERSION, vxhs_callback);
    return 0;
}
EOF
  vxhs_libs="-lvxhs -lssl"
  if compile_prog "" "$vxhs_libs" ; then
    vxhs=yes
  else
    if test "$vxhs" = "yes" ; then
      feature_not_found "vxhs block device" "Install libvxhs See github"
    fi
    vxhs=no
  fi
fi

##########################################
# check for _Static_assert()

have_static_assert<


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