#!/bin/sh
# Configure script for util-linux - aeb, 990205
#
# We need to find out the following things:
#
#  1. For mount/nfsmount.c: is inet_aton() available?
#  2. For fdisk/fdisksunlabel.c: is there a <scsi/scsi.h>?
#     For fdisk/fdisk.c: is there a <linux/blkpg.h>?
#  4. For sys-utils/cytune.c: do we need <linux/tqueue.h>?
#  5. For sys-utils/kbd_rate.c: does <linux/kd.h> exist?
#  6. For cfdisk, setterm, more, ul: do we have ncurses? How installed?
#     For more: do we have libtermcap?
#  7. For chfn, chsh, login, newgrp, passwd: do we need -lcrypt?
#  8. For sln: does static compilation work?
#  9. For lib/nls.h: do we have <locale.h>?
# 10. For lib/nls.h: do we have <libintl.h> and gettext()?
# 11. For xgettext: does it take the option --foreign-user?
# 12. For cal.c: do we have <langinfo.h>?
# 13. For err.c: do we have __progname?
# 14. For script.c: do we have <pty.h> and openpty()?
# 15. For lib/widechar.h: do we have wide character support?
# 16. For clock/kd.c: do we have nanosleep()?

rm -f make_include defines.h

VERSION=`cat VERSION`
echo
echo configuring util-linux-$VERSION
echo
echo "VERSION=$VERSION" > make_include
echo '#define UTIL_LINUX_VERSION "'$VERSION'"' > defines.h
echo '#define util_linux_version "util-linux-'$VERSION'"' >> defines.h
echo >> defines.h

if test -z "$CC"
then
  if test "$RANDOM" = "$RANDOM"; then
    # Plain old Bourne shell.
    echo checking for gcc
    test -z "$CC" -a -n "`gcc 2>&1`" && CC="gcc -O"
  else
    # ksh, bash or zsh.  ksh and zsh write "command not found" to stderr.
    echo checking for gcc
    test -z "$CC" && type gcc && CC="gcc -O"
  fi
else
  echo "Using CC=\"$CC\""
  echo
fi

CC=${CC-cc}
CFLAGS=${CFLAGS-"-O"}
DEFS=
LIBS=
compile='$CC $CFLAGS $DEFS conftest.c -o conftest $LIBS >/dev/null 2>&1'
static_compile='$CC -static $DEFS conftest.c -o conftest $LIBS >/dev/null 2>&1'
eval COMPILE='"'$compile'"'
export COMPILE

rm -f conftest.c conftest

#
# 1. For mount/nfsmount.c: is inet_aton() available?
#
echo "
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
main(int a, char **v){
  if (a == -1)	/* false */
	inet_aton((const char *) 0, (struct in_addr *) 0);
  exit(0);
}
" > conftest.c
eval $compile
if test -s conftest && ./conftest 2>/dev/null; then
	echo "#define HAVE_inet_aton" >> defines.h
	echo "You have inet_aton()"
else
	echo "You don't have inet_aton()"
fi
rm -f conftest conftest.c

#
# 2. For fdisk/fdisksunlabel.c: is <scsi/scsi.h> available?
#    Some kernels have <scsi/scsi.h> that uses u_char
#    But maybe there is already a typedef. Let us use a #define
#
echo "
#define u_char	unsigned char
#include <scsi/scsi.h>
#undef u_char
main(){ exit(0); }
" > conftest.c
eval $compile
if test -s conftest && ./conftest 2>/dev/null; then
        echo "#define HAVE_scsi_h" >> defines.h
        echo "You have <scsi/scsi.h>"
else
        echo "You don't have <scsi/scsi.h>"
fi
rm -f conftest conftest.c

#
# 2A. For fdisk/fdisk.c: is <linux/blkpg.h> available?
#
if ./testincl "linux/blkpg.h"; then
        echo "#define HAVE_blkpg_h" >> defines.h
fi

#
# 4. cytune.c may need struct tq_struct
#
echo "
#include <sys/types.h>
#include <linux/cyclades.h>
main(){ exit(0); }
" > conftest.c
eval $compile
if test -s conftest && ./conftest 2>/dev/null; then
	echo "You don't need <linux/tqueue.h>"
else
	echo "#define NEED_tqueue_h" >> defines.h
	echo "You need <linux/tqueue.h>"
fi
rm -f conftest conftest.c

#
# 5. Does <linux/kd.h> exist?
#
if ./testincl "linux/kd.h"; then
	echo "#define HAVE_kd_h" >> defines.h
fi

#
# 6. How is [n]curses installed?
#
test_curses_h=0
have_ncurses=1
if ! ./testincl "term.h"; then
	have_ncurses=0
elif ./testincl -q "ncurses/curses.h"; then
	echo "HAVE_NCURSES=yes" >> make_include
	echo "CURSESFLAGS=-I/usr/include/ncurses -DNCH=0" >> make_include
	echo "You have ncurses. Using <ncurses/curses.h>."
elif ./testincl -q "ncurses.h"; then
	echo "HAVE_NCURSES=yes" >> make_include
	echo "CURSESFLAGS=-DNCH=1" >> make_include
	echo "You have ncurses. Using <ncurses.h>."
elif [ -f /usr/local/include/ncurses.h ]; then
	echo "HAVE_NCURSES=yes" >> make_include
	echo "CURSESFLAGS=-I/usr/local/include -DNCH=1" >> make_include
	echo "You have ncurses. Using /usr/local/include/ncurses.h."
elif ./testincl -q "curses.h"; then
	test_curses_h=1
else
	have_ncurses=0
fi
#
# If we found a curses.h, test whether it is ncurses
# (It should define __NCURSES_H and NCURSES_VERSION and NCURSES_CONST ...)
#
if [ $test_curses_h = 1 ]; then
  echo "
  #include <curses.h>
  main(){ char *c = NCURSES_VERSION; exit(0); }
  " > conftest.c
  eval $compile
  if test -s conftest && ./conftest 2>/dev/null; then
	echo "HAVE_NCURSES=yes" >> make_include
	echo "CURSESFLAGS=-DNCH=0" >> make_include
	echo "You have ncurses. Using <curses.h>."
  else
	have_ncurses=0
  fi
  rm -f conftest conftest.c
fi

if [ $have_ncurses = 0 ]; then
	echo "HAVE_NCURSES=no" >> make_include
	echo "You don't have ncurses - I will not make ul and setterm."
else
	echo "LIBCURSES=-lncurses" >> make_include
fi

#
# Some systems have /usr/lib/termcap.so -> /usr/lib/termcap.so.2
# where however the latter file does not exist. When termcap does
# not exist, we can try to compile more with curses instead.
#
echo '
#include <termcap.h>
main(){ exit(0); tgetnum("li"); }
' > conftest.c
LIBS=-ltermcap
eval $compile
LIBS=
if test -s conftest && ./conftest 2>/dev/null; then
	echo "#define HAVE_termcap" >> defines.h
	echo "LIBTERMCAP=-ltermcap" >> make_include
	echo "You have termcap"
else
	echo "HAVE_TERMCAP=no" >> make_include
	if [ $have_ncurses = 0 ]; then
		echo "You don't have termcap - I will not make more."
	else
		echo "You don't have termcap"
	fi
fi
rm -f conftest conftest.c

#
# 7. Do we need -lcrypt?
#
echo '
#define _XOPEN_SOURCE
#include <unistd.h>
main(){ char *c = crypt("abc","pw"); exit(0); }
' > conftest.c
eval $compile
if test -s conftest && ./conftest 2>/dev/null; then
	echo "NEED_LIBCRYPT=no" >> make_include
	echo "You don't need -lcrypt"
else
	echo "NEED_LIBCRYPT=yes" >> make_include
	echo "You need -lcrypt"
fi
rm -f conftest conftest.c

#
# 8. Does static compilation work?
#
echo "
main(){ return 0; }
" > conftest.c
eval $static_compile
if test -s conftest && ./conftest 2>/dev/null; then
	: OK, nothing special
else
	echo "CAN_DO_STATIC=no" >> make_include
	echo "Strange... Static compilation fails here."
fi

#
# 9. For lib/nls.h: do we have <locale.h>?
#
if ./testincl "locale.h"; then
        echo "#define HAVE_locale_h" >> defines.h
fi


#
# 10. For lib/nls.h: do we have <libintl.h> and gettext() ?
#
echo '
#include <libintl.h>
main(int a, char **v){
  if (a == -1)  /* false */
        gettext("There is no gettext man page\n");
  exit(0);
}
' > conftest.c
eval $compile
if test -s conftest && ./conftest 2>/dev/null; then
        echo '#define HAVE_libintl_h' >> defines.h
        echo "You have <libintl.h> and gettext()"
        echo '#define ENABLE_NLS' >> defines.h
        echo "Assuming that you want to enable NLS support."
        echo "(Otherwise, edit defines.h and remove the line with ENABLE_NLS)"
        ENABLE_NLS=yes
else
        echo "You don't have <libintl.h>"
        ENABLE_NLS=no
fi
rm -f conftest conftest.c


#
# 11. Does xgettext exist and take the option --foreign-user?
#
if (test $ENABLE_NLS = yes && type xgettext > /dev/null 2>&1); then
	msg=`xgettext --foreign-user 2>&1 | grep unrecognized`
	if test -n "$msg"; then
		echo "FOREIGN = " >> make_include
	else
		echo "FOREIGN = --foreign-user" >> make_include
	fi
	echo "HAVE_XGETTEXT=yes" >> make_include
else
	echo "HAVE_XGETTEXT=no" >> make_include
fi

#
# 12. For cal.c: do we have <langinfo.h>?
#
if ./testincl "langinfo.h"; then
        echo "#define HAVE_langinfo_h" >> defines.h
fi


#
# 13. For err.c: do we have __progname?
# [make sure gcc -O does not optimize the access away]
#
echo "
#include <stdio.h>
extern char *__progname;
main(){ printf(__progname); exit(0); }
" > conftest.c
eval $compile
if test -s conftest && ./conftest > /dev/null 2>/dev/null; then
        echo "#define HAVE_progname" >> defines.h
        echo "You have __progname"
else
        echo "You don't have __progname"
fi
rm -f conftest conftest.c

#
# 14. For script.c: do we have <pty.h> and openpty()?
#
echo "
#include <pty.h>
main(){ exit(0); openpty(0, 0, 0, 0, 0); }
" > conftest.c
eval $compile
if test -s conftest && ./conftest 2>/dev/null; then
	echo "HAVE_OPENPTY=yes" >> make_include
	echo "#define HAVE_openpty" >> defines.h
	echo "You have <pty.h> and openpty()"
else
	echo "You don't have <pty.h> and openpty()"
fi
rm -f conftest conftest.c

#
# 15. For lib/widechar.h: do we have wide character support?
# [Do we have the headers <wchar.h>, <wctype.h>, the types wchar_t, wint_t
# and the fgetwc, fputwc, WEOF functions/macros?]
#
echo "
#include <wchar.h>
#include <wctype.h>
#include <stdio.h>
int main () {
  wchar_t wc;
  wint_t w;
  w = fgetwc(stdin);
  if (w == WEOF) exit(1);
  wc = w;
  fputwc(wc,stdout);
  exit(0);
}
" > conftest.c
eval $compile
if test -s conftest && ./conftest < conftest.c > /dev/null 2>/dev/null; then
        echo "#define ENABLE_WIDECHAR" >> defines.h
        echo "You have wide character support"
else
        echo "You don't have wide character support"
fi
rm -f conftest conftest.c

#
# 16. For clock/kd.c: do we have nanosleep?
#
echo "
#include <time.h>
int main () {
  struct timespec sleep = { 0, 1 };
  nanosleep( &sleep, NULL );
  exit(0);
}
" > conftest.c
eval $compile
if test -s conftest && ./conftest 2>/dev/null; then
	echo "#define HAVE_nanosleep" >> defines.h
	echo "You have nanosleep()"
else
	echo "You don't have nanosleep()"
fi
rm -f conftest conftest.c