configure - pub/scm/linux/kernel/git/luto/util-linux-playground - Git at Google

 #!/bin/sh
 # Configure script for util-linux - aeb, 990205
 #
 # We need to find out the following things:
 #
 # Version of gcc
 #
 # Existence of header files:
 # H1. For fdisksunlabel.c: is there a <scsi/scsi.h>?
 # H2. For fdisk.c: is there a <linux/blkpg.h>?
 # H3. For kbd_rate.c: does <linux/kd.h> exist?
 # H4. For nls.h: do we have <locale.h>?
 # H5. For cal.c: do we have <langinfo.h>?
 # H6. For mkswap.c: do we have <sys/user.h> or <asm/page.h>?
 # H7. For nfsmount.c: do we have <rpcsvc/nfs_prot.h>?
 # H8. For nfsmount.h (nfsmount_xdr.c: int32_t): do we have <asm/types.h>?
 # H9. For raw.c: do we have <linux/raw.h>?
 #
 # Existence of functions:
 # F1. For nfsmount.c: is inet_aton() available?
 # F2. For mkswap.c: is fsync() available?
 # F3. For agetty.c: is getdomainname() available?
 # F4. For hwclock/kd.c: do we have nanosleep()?
 # F5. For mkswap.c: do we have personality()?
 # F6. For agetty.c: is updwtmp() available?
 # F7. For pg.c: are fseeko() and ftello() available?
 # F8. For fsck.cramfs.c: is lchown() available?
 #
 #  1. For sys-utils/cytune.c: do we need <linux/tqueue.h>?
 #  2. For cfdisk, setterm, more, ul: do we have ncurses? How installed?
 #  3. For more: do we have libtermcap?
 #  4. For chfn, chsh, login, newgrp, passwd: do we need -lcrypt?
 #  5. For sln: does static compilation work?
 #  6. For lib/nls.h: do we have <libintl.h> and gettext()?
 #  7. For xgettext: does it take the option --foreign-user?
 #  8. For err.c: do we have __progname?
 #  9. For script.c: do we have <pty.h> and openpty()?
 # 10. For lib/widechar.h: do we have wide character support?
 # 11. For pivot_root.c: does <linux/unistd.h> define __NR_pivot_root?
 # 12. For hwclock.c: does struct tm have a field tm_gmtoff?
 # 13. For nfsmount: does the output of rpcgen compile?
 # 14. For fsck.cramfs, mkfs.cramfs: do we have libz?

 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

 CC=${CC-cc}
 CFLAGS=${CFLAGS-"-O"}
 LDFLAGS=${LDFLAGS-"-s"}
 echo CC=$CC >> make_include
 echo CFLAGS=$CFLAGS >> make_include
 echo LDFLAGS=$LDFLAGS >> make_include

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

 rm -f conftest.c conftest

 #
 # Old gcc wants options like -m486, but gcc 3.0 says
 # `-m486' is deprecated. Use `-march=i486' or `-mcpu=i486' instead.
 #
 echo "
 int main(){ exit(0); }
 " > conftest.c
 gccout=`$CC $CFLAGS -m386 conftest.c -o conftest 2>&1 | grep "march="`
 if test -z "$gccout"; then
     echo "HAVE_OLD_GCC=yes" >> make_include
 fi
 rm -f conftest conftest.c

 #
 # Find out about the existence of header files
 #

 #
 # H1. 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
 int main(){ exit(0); }
 " > conftest.c
 eval $compile
 if test -s conftest; 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

 #
 # H2. For fdisk/fdisk.c: is <linux/blkpg.h> available?
 #
 if ./testincl "linux/blkpg.h"; then
         echo "#define HAVE_blkpg_h" >> defines.h
 fi

 #
 # H3. Does <linux/kd.h> exist?
 #
 if ./testincl "linux/kd.h"; then
 	echo "#define HAVE_kd_h" >> defines.h
 fi

 #
 # H4. For lib/nls.h: do we have <locale.h>?
 #
 if ./testincl "locale.h"; then
         echo "#define HAVE_locale_h" >> defines.h
 fi

 #
 # H5. For cal.c: do we have <langinfo.h>?
 #
 if ./testincl "langinfo.h"; then
         echo "#define HAVE_langinfo_h" >> defines.h
 fi

 #
 # H6. For mkswap.c: do we have <sys/user.h> or <asm/page.h>?
 #
 if ./testincl "sys/user.h"; then
         echo "#define HAVE_sys_user_h" >> defines.h
 else if ./testincl "asm/page.h"; then
         echo "#define HAVE_asm_page_h" >> defines.h
 fi fi

 #
 # H7. For nfsmount.c: do we have <rpcsvc/nfs_prot.h>?
 #
 if ./testincl "rpcsvc/nfs_prot.h"; then
 	echo "#define HAVE_rpcsvc_nfs_prot_h" >> defines.h
 fi

 #
 # H8. For nfsmount.h: do we have <asm/types.h>?
 #
 if ./testincl "asm/types.h"; then
         echo "#define HAVE_asm_types_h" >> defines.h
 fi

 #
 # H9. For raw.c: do we have <linux/raw.h>?
 #
 if ./testincl "linux/raw.h"; then
         echo "HAVE_RAW_H=yes" >> make_include
 fi


 #
 # Find out about the existence of functions
 #

 #
 # F1. For mount/nfsmount.c: is inet_aton() available?
 #
 echo "
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 int 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; 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

 #
 # F2. For mkswap.c: is fsync() available?
 #
 echo "
 #include <unistd.h>
 int main(int a, char **v){
   if (a == -1)  /* false */
     fsync(0);
   exit(0);
 }
 " > conftest.c
 eval $compile
 if test -s conftest; then
 	echo "#define HAVE_fsync" >> defines.h
 	echo "You have fsync()"
 else
 	echo "You don't have fsync()"
 fi
 rm -f conftest conftest.c

 #
 # F3. For agetty.c: is getdomainname() available?
 #
 echo "
 #include <unistd.h>
 int main(int a, char **v){
   char buf[1];
   if (a == -1)  /* false */
     getdomainname(buf, sizeof buf);
   exit(0);
 }
 " > conftest.c
 eval $compile
 if test -s conftest; then
         echo "#define HAVE_getdomainname" >> defines.h
         echo "You have getdomainname()"
 else
         echo "You don't have getdomainname()"
 fi
 rm -f conftest conftest.c

 #
 # F4. For hwclock/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; then
 	echo "#define HAVE_nanosleep" >> defines.h
 	echo "You have nanosleep()"
 else
 	echo "You don't have nanosleep()"
 fi
 rm -f conftest conftest.c

 #
 # F5. For mkswap.c: do we have personality()?
 #
 echo "
 int main () {
   extern int personality(unsigned long);
   personality(0);
   exit(0);
 }
 " > conftest.c
 eval $compile
 if test -s conftest; then
 	echo "#define HAVE_personality" >> defines.h
 	echo "You have personality()"
 else
 	echo "You don't have personality()"
 fi
 rm -f conftest conftest.c

 #
 # F6. For agetty.c: is updwtmp() available?
 #
 echo '
 #include <string.h>
 #include <utmp.h>
 int main(int a, char **v){
   struct  utmp ut;
   memset (&ut, 0, sizeof(ut));
   if (a == -1)  /* false */
     updwtmp("/nowhere/wtmp", &ut);
   exit(0);
 }
 ' > conftest.c
 eval $compile
 if test -s conftest; then
         echo "#define HAVE_updwtmp" >> defines.h
         echo "You have updwtmp()"
 else
         echo "You don't have updwtmp()"
 fi
 rm -f conftest conftest.c

 #
 # F7. For pg.c: are fseeko() and ftello() available?
 #
 echo '
 #include <stdio.h>
 int main(int a, char **v){
   fseeko(stdout, 0, 0);
   ftello(stdout);
   exit(0);
 }
 ' > conftest.c
 eval $compile
 if test -s conftest; then
         echo "#define HAVE_fseeko" >> defines.h
         echo "You have fseeko()"
 else
         echo "You don't have fseeko()"
 fi
 rm -f conftest conftest.c

 #
 # F8. For fsck.cramfs.c: is lchown() available?
 #
 echo '
 #include <sys/types.h>
 #include <unistd.h>
 int main(int a, char **v){
   lchown("nowhere",0,0);
   exit(0);
 }
 ' > conftest.c
 gccout=`eval $compile_with_warnings | grep "lchown is not implemented"`
 if test -s conftest -a -z "$gccout"; then
         echo "#define HAVE_lchown" >> defines.h
         echo "You have lchown()"
 else
         echo "You don't have lchown()"
 fi
 rm -f conftest conftest.c

 #
 # 1. cytune.c may need struct tq_struct
 #
 echo "
 #include <sys/types.h>
 #include <linux/cyclades.h>
 int main(){ exit(0); }
 " > conftest.c
 eval $compile
 if test -s conftest; 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

 #
 # 2. 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>
   int main(){ char *c = NCURSES_VERSION; exit(0); }
   " > conftest.c
   eval $compile
   if test -s conftest; 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

 #
 # 3. 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>
 int main(){ exit(0); tgetnum("li"); }
 ' > conftest.c
 LIBS=-ltermcap
 eval $compile
 LIBS=
 if test -s conftest; then
 	echo "#define HAVE_termcap" >> defines.h
 	echo "HAVE_TERMCAP=yes" >> make_include
 	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

 #
 # 4. Do we need -lcrypt?
 #
 echo '
 #define _XOPEN_SOURCE
 #include <unistd.h>
 int main(){ char *c = crypt("abc","pw"); exit(0); }
 ' > conftest.c
 eval $compile
 if test -s conftest; 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

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

 #
 # 6. For lib/nls.h: do we have <libintl.h> and gettext() ?
 #
 echo '
 #include <libintl.h>
 int 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; then
         echo '#define HAVE_libintl_h' >> defines.h
         echo "You have <libintl.h> and gettext()"
         echo '#define MAY_ENABLE_NLS' >> defines.h
         MAY_ENABLE_NLS=yes
 else
         echo "You don't have native language support"
         MAY_ENABLE_NLS=no
 fi
 rm -f conftest conftest.c


 #
 # 7. Does xgettext exist and take the option --foreign-user?
 #
 # We use the bash builtin "type" here.
 # I don't see an easy way to avoid it.
 # Many Linux systems do not have "which". Maybe "env" can be used.
 # Writing /usr/bin/xgettext is no good: one may have xgettext elsewhere.
 #
 if (test $MAY_ENABLE_NLS = yes && type xgettext > /dev/null 2>&1); then
 	msg=`xgettext --foreign-user 2>&1 | grep unrecognized`
 	if test -n "$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


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

 #
 # 9. For script.c: do we have <pty.h> and openpty()?
 #
 echo "
 #include <pty.h>
 int main(){ exit(0); openpty(0, 0, 0, 0, 0); }
 " > conftest.c
 LIBS=-lutil
 eval $compile
 LIBS=
 if test -s conftest; 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

 #
 # 10. 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

 #
 # 11. For pivot_root.c: does <linux/unistd.h> define __NR_pivot_root?
 #
 echo "
 #include <linux/unistd.h>
 int main(void)
 {
     return __NR_pivot_root;
 }
 " >conftest.c
 eval $compile
 if test -s conftest; then
 	echo "HAVE_PIVOT_ROOT=yes" >> make_include
 	echo "You have __NR_pivot_root"
 else
 	echo "You don't have __NR_pivot_root"
 fi
 rm -f conftest conftest.c

 #
 # 12. For hwclock.c: does struct tm have a field tm_gmtoff?
 #
 echo "
 #include <time.h>
 #include <unistd.h>
 int main(int a, char **v)
 {
     struct tm *tm = localtime(0);
     if (a == -1)  /* false */
         sleep(tm->tm_gmtoff);
     exit(0);
 }
 " >conftest.c
 eval $compile
 if test -s conftest; then
         echo "#define HAVE_tm_gmtoff" >> defines.h
         echo "You have a tm_gmtoff field in struct tm"
 else
         echo "You don't have a tm_gmtoff field in struct tm"
 fi
 rm -f conftest conftest.c

 #
 # 13. For nfsmount: does the output of rpcgen compile?
 #
 # On some systems the output of rpcgen compiles with warnings
 # Here we conclude "Your rpcgen output does not compile"
 # and use pregenerated files. If one wishes to use rpcgen anyway,
 # just add the line "HAVE_GOOD_RPC=yes" to make_include.
 #
 rm -f conftest conftestx.c conftestl.c conftest.h conftest.x
 rm -f conftestx.o conftestl.o
 echo "
 #ifdef RPC_CLNT
 %#include <string.h>            /* for memset() */
 #endif
 %#include <asm/types.h>
 typedef opaque fhandle[1];
 union fhstatus switch (unsigned fhs_status) {
 case 0:
         fhandle fhs_fhandle;
 default:
         void;
 };
 typedef string dirpath<1024>;
 struct ppathcnf {
     short   pc_mask[2];
 };

 program MOUNTPROG {
     version MOUNTVERS {
 	fhstatus
 	MOUNTPROC_MNT(dirpath) = 1;
     } = 2;
 } = 100005;
 " > conftest.x
 if rpcgen -h -o conftest.h conftest.x 2> conferrs && \
    rpcgen -c -o conftestx.c conftest.x 2>> conferrs && \
    rpcgen -l -o conftestl.c conftest.x 2>> conferrs && \
    cc -c conftestx.c 2>> conferrs && cc -c conftestl.c 2>> conferrs && \
    test ! -s conferrs
 then
         echo "HAVE_GOOD_RPC=yes" >> make_include
         echo "Your rpcgen seems to work"
 else
         echo "Your rpcgen output does not compile - using pregenerated code"
 fi
 rm -f conftest conftestx.c conftestl.c conftest.h conftest.x conferrs
 rm -f conftestx.o conftestl.o

 #
 # 14. For fsck.cramfs, mkfs.cramfs: do we have libz?
 #
 echo '
 #include <zlib.h>
 int main(){ exit(0); crc32(0, 0, 0); }
 ' > conftest.c
 LIBS=-lz
 eval $compile
 LIBS=
 if test -s conftest; then
         echo "HAVE_ZLIB=yes" >> make_include
         echo "You have zlib"
 else
         echo "HAVE_ZLIB=no" >> make_include
         echo "You don't have zlib"
 fi
 rm -f conftest conftest.c
	#!/bin/sh
	# Configure script for util-linux - aeb, 990205
	#
	# We need to find out the following things:
	#
	# Version of gcc
	#
	# Existence of header files:
	# H1. For fdisksunlabel.c: is there a <scsi/scsi.h>?
	# H2. For fdisk.c: is there a <linux/blkpg.h>?
	# H3. For kbd_rate.c: does <linux/kd.h> exist?
	# H4. For nls.h: do we have <locale.h>?
	# H5. For cal.c: do we have <langinfo.h>?
	# H6. For mkswap.c: do we have <sys/user.h> or <asm/page.h>?
	# H7. For nfsmount.c: do we have <rpcsvc/nfs_prot.h>?
	# H8. For nfsmount.h (nfsmount_xdr.c: int32_t): do we have <asm/types.h>?
	# H9. For raw.c: do we have <linux/raw.h>?
	#
	# Existence of functions:
	# F1. For nfsmount.c: is inet_aton() available?
	# F2. For mkswap.c: is fsync() available?
	# F3. For agetty.c: is getdomainname() available?
	# F4. For hwclock/kd.c: do we have nanosleep()?
	# F5. For mkswap.c: do we have personality()?
	# F6. For agetty.c: is updwtmp() available?
	# F7. For pg.c: are fseeko() and ftello() available?
	# F8. For fsck.cramfs.c: is lchown() available?
	#
	# 1. For sys-utils/cytune.c: do we need <linux/tqueue.h>?
	# 2. For cfdisk, setterm, more, ul: do we have ncurses? How installed?
	# 3. For more: do we have libtermcap?
	# 4. For chfn, chsh, login, newgrp, passwd: do we need -lcrypt?
	# 5. For sln: does static compilation work?
	# 6. For lib/nls.h: do we have <libintl.h> and gettext()?
	# 7. For xgettext: does it take the option --foreign-user?
	# 8. For err.c: do we have __progname?
	# 9. For script.c: do we have <pty.h> and openpty()?
	# 10. For lib/widechar.h: do we have wide character support?
	# 11. For pivot_root.c: does <linux/unistd.h> define __NR_pivot_root?
	# 12. For hwclock.c: does struct tm have a field tm_gmtoff?
	# 13. For nfsmount: does the output of rpcgen compile?
	# 14. For fsck.cramfs, mkfs.cramfs: do we have libz?

	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

	CC=${CC-cc}
	CFLAGS=${CFLAGS-"-O"}
	LDFLAGS=${LDFLAGS-"-s"}
	echo CC=$CC >> make_include
	echo CFLAGS=$CFLAGS >> make_include
	echo LDFLAGS=$LDFLAGS >> make_include

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

	rm -f conftest.c conftest

	#
	# Old gcc wants options like -m486, but gcc 3.0 says
	# `-m486' is deprecated. Use `-march=i486' or `-mcpu=i486' instead.
	#
	echo "
	int main(){ exit(0); }
	" > conftest.c
	gccout=`$CC $CFLAGS -m386 conftest.c -o conftest 2>&1 \| grep "march="`
	if test -z "$gccout"; then
	echo "HAVE_OLD_GCC=yes" >> make_include
	fi
	rm -f conftest conftest.c

	#
	# Find out about the existence of header files
	#

	#
	# H1. 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
	int main(){ exit(0); }
	" > conftest.c
	eval $compile
	if test -s conftest; 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

	#
	# H2. For fdisk/fdisk.c: is <linux/blkpg.h> available?
	#
	if ./testincl "linux/blkpg.h"; then
	echo "#define HAVE_blkpg_h" >> defines.h
	fi

	#
	# H3. Does <linux/kd.h> exist?
	#
	if ./testincl "linux/kd.h"; then
	echo "#define HAVE_kd_h" >> defines.h
	fi

	#
	# H4. For lib/nls.h: do we have <locale.h>?
	#
	if ./testincl "locale.h"; then
	echo "#define HAVE_locale_h" >> defines.h
	fi

	#
	# H5. For cal.c: do we have <langinfo.h>?
	#
	if ./testincl "langinfo.h"; then
	echo "#define HAVE_langinfo_h" >> defines.h
	fi

	#
	# H6. For mkswap.c: do we have <sys/user.h> or <asm/page.h>?
	#
	if ./testincl "sys/user.h"; then
	echo "#define HAVE_sys_user_h" >> defines.h
	else if ./testincl "asm/page.h"; then
	echo "#define HAVE_asm_page_h" >> defines.h
	fi fi

	#
	# H7. For nfsmount.c: do we have <rpcsvc/nfs_prot.h>?
	#
	if ./testincl "rpcsvc/nfs_prot.h"; then
	echo "#define HAVE_rpcsvc_nfs_prot_h" >> defines.h
	fi

	#
	# H8. For nfsmount.h: do we have <asm/types.h>?
	#
	if ./testincl "asm/types.h"; then
	echo "#define HAVE_asm_types_h" >> defines.h
	fi

	#
	# H9. For raw.c: do we have <linux/raw.h>?
	#
	if ./testincl "linux/raw.h"; then
	echo "HAVE_RAW_H=yes" >> make_include
	fi


	#
	# Find out about the existence of functions
	#

	#
	# F1. For mount/nfsmount.c: is inet_aton() available?
	#
	echo "
	#include <sys/socket.h>
	#include <netinet/in.h>
	#include <arpa/inet.h>
	int 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; 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

	#
	# F2. For mkswap.c: is fsync() available?
	#
	echo "
	#include <unistd.h>
	int main(int a, char **v){
	if (a == -1) /* false */
	fsync(0);
	exit(0);
	}
	" > conftest.c
	eval $compile
	if test -s conftest; then
	echo "#define HAVE_fsync" >> defines.h
	echo "You have fsync()"
	else
	echo "You don't have fsync()"
	fi
	rm -f conftest conftest.c

	#
	# F3. For agetty.c: is getdomainname() available?
	#
	echo "
	#include <unistd.h>
	int main(int a, char **v){
	char buf[1];
	if (a == -1) /* false */
	getdomainname(buf, sizeof buf);
	exit(0);
	}
	" > conftest.c
	eval $compile
	if test -s conftest; then
	echo "#define HAVE_getdomainname" >> defines.h
	echo "You have getdomainname()"
	else
	echo "You don't have getdomainname()"
	fi
	rm -f conftest conftest.c

	#
	# F4. For hwclock/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; then
	echo "#define HAVE_nanosleep" >> defines.h
	echo "You have nanosleep()"
	else
	echo "You don't have nanosleep()"
	fi
	rm -f conftest conftest.c

	#
	# F5. For mkswap.c: do we have personality()?
	#
	echo "
	int main () {
	extern int personality(unsigned long);
	personality(0);
	exit(0);
	}
	" > conftest.c
	eval $compile
	if test -s conftest; then
	echo "#define HAVE_personality" >> defines.h
	echo "You have personality()"
	else
	echo "You don't have personality()"
	fi
	rm -f conftest conftest.c

	#
	# F6. For agetty.c: is updwtmp() available?
	#
	echo '
	#include <string.h>
	#include <utmp.h>
	int main(int a, char **v){
	struct utmp ut;
	memset (&ut, 0, sizeof(ut));
	if (a == -1) /* false */
	updwtmp("/nowhere/wtmp", &ut);
	exit(0);
	}
	' > conftest.c
	eval $compile
	if test -s conftest; then
	echo "#define HAVE_updwtmp" >> defines.h
	echo "You have updwtmp()"
	else
	echo "You don't have updwtmp()"
	fi
	rm -f conftest conftest.c

	#
	# F7. For pg.c: are fseeko() and ftello() available?
	#
	echo '
	#include <stdio.h>
	int main(int a, char **v){
	fseeko(stdout, 0, 0);
	ftello(stdout);
	exit(0);
	}
	' > conftest.c
	eval $compile
	if test -s conftest; then
	echo "#define HAVE_fseeko" >> defines.h
	echo "You have fseeko()"
	else
	echo "You don't have fseeko()"
	fi
	rm -f conftest conftest.c

	#
	# F8. For fsck.cramfs.c: is lchown() available?
	#
	echo '
	#include <sys/types.h>
	#include <unistd.h>
	int main(int a, char **v){
	lchown("nowhere",0,0);
	exit(0);
	}
	' > conftest.c
	gccout=`eval $compile_with_warnings \| grep "lchown is not implemented"`
	if test -s conftest -a -z "$gccout"; then
	echo "#define HAVE_lchown" >> defines.h
	echo "You have lchown()"
	else
	echo "You don't have lchown()"
	fi
	rm -f conftest conftest.c

	#
	# 1. cytune.c may need struct tq_struct
	#
	echo "
	#include <sys/types.h>
	#include <linux/cyclades.h>
	int main(){ exit(0); }
	" > conftest.c
	eval $compile
	if test -s conftest; 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

	#
	# 2. 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>
	int main(){ char *c = NCURSES_VERSION; exit(0); }
	" > conftest.c
	eval $compile
	if test -s conftest; 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

	#
	# 3. 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>
	int main(){ exit(0); tgetnum("li"); }
	' > conftest.c
	LIBS=-ltermcap
	eval $compile
	LIBS=
	if test -s conftest; then
	echo "#define HAVE_termcap" >> defines.h
	echo "HAVE_TERMCAP=yes" >> make_include
	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

	#
	# 4. Do we need -lcrypt?
	#
	echo '
	#define _XOPEN_SOURCE
	#include <unistd.h>
	int main(){ char *c = crypt("abc","pw"); exit(0); }
	' > conftest.c
	eval $compile
	if test -s conftest; 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

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

	#
	# 6. For lib/nls.h: do we have <libintl.h> and gettext() ?
	#
	echo '
	#include <libintl.h>
	int 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; then
	echo '#define HAVE_libintl_h' >> defines.h
	echo "You have <libintl.h> and gettext()"
	echo '#define MAY_ENABLE_NLS' >> defines.h
	MAY_ENABLE_NLS=yes
	else
	echo "You don't have native language support"
	MAY_ENABLE_NLS=no
	fi
	rm -f conftest conftest.c


	#
	# 7. Does xgettext exist and take the option --foreign-user?
	#
	# We use the bash builtin "type" here.
	# I don't see an easy way to avoid it.
	# Many Linux systems do not have "which". Maybe "env" can be used.
	# Writing /usr/bin/xgettext is no good: one may have xgettext elsewhere.
	#
	if (test $MAY_ENABLE_NLS = yes && type xgettext > /dev/null 2>&1); then
	msg=`xgettext --foreign-user 2>&1 \| grep unrecognized`
	if test -n "$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


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

	#
	# 9. For script.c: do we have <pty.h> and openpty()?
	#
	echo "
	#include <pty.h>
	int main(){ exit(0); openpty(0, 0, 0, 0, 0); }
	" > conftest.c
	LIBS=-lutil
	eval $compile
	LIBS=
	if test -s conftest; 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

	#
	# 10. 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

	#
	# 11. For pivot_root.c: does <linux/unistd.h> define __NR_pivot_root?
	#
	echo "
	#include <linux/unistd.h>
	int main(void)
	{
	return __NR_pivot_root;
	}
	" >conftest.c
	eval $compile
	if test -s conftest; then
	echo "HAVE_PIVOT_ROOT=yes" >> make_include
	echo "You have __NR_pivot_root"
	else
	echo "You don't have __NR_pivot_root"
	fi
	rm -f conftest conftest.c

	#
	# 12. For hwclock.c: does struct tm have a field tm_gmtoff?
	#
	echo "
	#include <time.h>
	#include <unistd.h>
	int main(int a, char **v)
	{
	struct tm *tm = localtime(0);
	if (a == -1) /* false */
	sleep(tm->tm_gmtoff);
	exit(0);
	}
	" >conftest.c
	eval $compile
	if test -s conftest; then
	echo "#define HAVE_tm_gmtoff" >> defines.h
	echo "You have a tm_gmtoff field in struct tm"
	else
	echo "You don't have a tm_gmtoff field in struct tm"
	fi
	rm -f conftest conftest.c

	#
	# 13. For nfsmount: does the output of rpcgen compile?
	#
	# On some systems the output of rpcgen compiles with warnings
	# Here we conclude "Your rpcgen output does not compile"
	# and use pregenerated files. If one wishes to use rpcgen anyway,
	# just add the line "HAVE_GOOD_RPC=yes" to make_include.
	#
	rm -f conftest conftestx.c conftestl.c conftest.h conftest.x
	rm -f conftestx.o conftestl.o
	echo "
	#ifdef RPC_CLNT
	%#include <string.h> /* for memset() */
	#endif
	%#include <asm/types.h>
	typedef opaque fhandle[1];
	union fhstatus switch (unsigned fhs_status) {
	case 0:
	fhandle fhs_fhandle;
	default:
	void;
	};
	typedef string dirpath<1024>;
	struct ppathcnf {
	short pc_mask[2];
	};

	program MOUNTPROG {
	version MOUNTVERS {
	fhstatus
	MOUNTPROC_MNT(dirpath) = 1;
	} = 2;
	} = 100005;
	" > conftest.x
	if rpcgen -h -o conftest.h conftest.x 2> conferrs && \
	rpcgen -c -o conftestx.c conftest.x 2>> conferrs && \
	rpcgen -l -o conftestl.c conftest.x 2>> conferrs && \
	cc -c conftestx.c 2>> conferrs && cc -c conftestl.c 2>> conferrs && \
	test ! -s conferrs
	then
	echo "HAVE_GOOD_RPC=yes" >> make_include
	echo "Your rpcgen seems to work"
	else
	echo "Your rpcgen output does not compile - using pregenerated code"
	fi
	rm -f conftest conftestx.c conftestl.c conftest.h conftest.x conferrs
	rm -f conftestx.o conftestl.o

	#
	# 14. For fsck.cramfs, mkfs.cramfs: do we have libz?
	#
	echo '
	#include <zlib.h>
	int main(){ exit(0); crc32(0, 0, 0); }
	' > conftest.c
	LIBS=-lz
	eval $compile
	LIBS=
	if test -s conftest; then
	echo "HAVE_ZLIB=yes" >> make_include
	echo "You have zlib"
	else
	echo "HAVE_ZLIB=no" >> make_include
	echo "You don't have zlib"
	fi
	rm -f conftest conftest.c