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# Helper to determine various system information
__init () {
# determine architecture triplet from the path of libc needed by the executing shell.
# please try not to use this to find/fetch libs in /lib or /usr/lib.
# Use ARCH_LIB_DIR, like "$ARCH_LIB_DIR/somefile.so" or "/usr$ARCH_LIB_DIR/somefile.so"
ARCH_TRIPLET=$(ldd $SHELL|grep "libc.so" | awk -F "/" '{print $3}')
[[ $ARCH_TRIPLET == *\(*\) ]] && ARCH_TRIPLET=""
ARCH_LIB_DIR=$(ldd $SHELL | grep "libc.so" | sed -r 's#^.*(/lib.*)/libc.so.*$#\1#g')
[ -z "$ARCH_LIB_DIR" -o ! -d "$ARCH_LIB_DIR" ] && perror "Could not determine arch dependent lib dir (where libc.so resides)"
# determine number of available CPU cores
declare -rg CPU_CORES="$( nproc || cat /proc/cpuinfo | grep processor | wc -l )"
# Determine if we have lib64
if [ "$(uname -m)" = "x86_64" ]; then
# Setting LIB64, as openSuse differentiates but Ubuntu does not:
case "$SYS_DISTRIBUTION" in
ubuntu | debian) LIB64="lib" ;;
opensuse | fedora | centos) LIB64="lib64" ;;
*) perror "Cannot set LIB64, SYS_DISTRIBUTION: $SYS_DISTRIBUTION unknown!" ;;
esac
X86_64_I386=x86_64
PLATFORM_DPKG=amd64
ARCHREGEX="(amd64|x86[_-]64)"
else
perror "Unsupported architecture/platform."
fi
# Set up make args
export MAKEFLAGS="-j$CPU_CORES"
ver=$(gcc -dumpversion)
ver=${ver%%.*}
if [ -n "$ver" ]; then
# Enable ccache?
if [ -n "$MLTK_CCACHE" ] && which ccache &> /dev/null; then
for cdir in "/usr/lib/ccache" "/lib/ccache" "/usr/local/ccache" ""; do
[ -d "$cdir" ] && break
done
if [ -n "$cdir" ] && mountpoint "/mnt/ccache"; then
export CCACHE_DIR="/mnt/ccache/gcc-${ver}"
export CCACHE_TEMPDIR="/tmp/ccache"
export CC="$cdir/gcc-${ver}"
export CXX="$cdir/g++-${ver}"
mkdir -p "$CCACHE_DIR" "$CCACHE_TEMPDIR"
pinfo "ccache detected"
export MAKEFLAGS="-j$(( CPU_CORES * 2 ))"
fi
fi
# Enable distcc?
if [ -n "$MLTK_DISTCC" ]; then
testfile="/tmp/test.$$.${RANDOM}.c"
echo "int main() { return 0; }" > "$testfile"
DISTCC_FALLBACK=0 distcc "gcc-${ver}" -o "${testfile}.bin" -c "$testfile" &>/dev/null
ret=$?
if [ "$ret" = 0 ] && [ -f "${testfile}.bin" ]; then
if [[ "$CC$CXX" == */ccache* ]]; then
# Both
export CCACHE_PREFIX="distcc"
pinfo "Using distcc + ccache"
else
for cdir in "/usr/lib/distcc" "/lib/distcc" "/usr/local/distcc" ""; do
[ -d "$cdir" ] && break
done
if [ -n "$cdir" ]; then
export CC="$cdir/gcc-${ver}"
export CXX="$cdir/g++-${ver}"
fi
pinfo "distcc detected"
fi
export MAKEFLAGS="-j40"
fi
rm -f -- "$testfile" "${testfile}.bin"
fi
fi
}
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