sysdeps/unix/sysv/linux/configure.in - nest-cam/v366/glibc - Git at Google

 GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
 # Local configure fragment for sysdeps/unix/sysv/linux.

 # Don't bother trying to generate any glue code to be compatible with the
 # existing system library, because we are the only system library.
 inhibit_glue=yes

 define([LIBC_LINUX_VERSION],[2.0.10])dnl
 if test -n "$sysheaders"; then
   OLD_CPPFLAGS=$CPPFLAGS
   CPPFLAGS="$CPPFLAGS $SYSINCLUDES"
 fi
 define([libc_cv_linuxVER], [libc_cv_linux]patsubst(LIBC_LINUX_VERSION,[\.]))dnl
 AC_CACHE_CHECK(installed Linux kernel header files, libc_cv_linuxVER, [dnl
 AC_EGREP_CPP([eat flaming death], [#include <linux/version.h>
 #if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE < ]dnl
 patsubst(LIBC_LINUX_VERSION,[^\([^.]*\)\.\([^.]*\)\.\([^.]*\)$],dnl
 [ (\1 *65536+ \2 *256+ \3) /* \1.\2.\3 */])[
 eat flaming death
 #endif],
 	     libc_cv_linuxVER='TOO OLD!',
 	     libc_cv_linuxVER='LIBC_LINUX_VERSION or later')])
 if test "$libc_cv_linuxVER" != 'LIBC_LINUX_VERSION or later'; then
   AC_MSG_ERROR([GNU libc requires kernel header files from
 Linux LIBC_LINUX_VERSION or later to be installed before configuring.
 The kernel header files are found usually in /usr/include/asm and
 /usr/include/linux; make sure these directories use files from
 Linux LIBC_LINUX_VERSION or later.  This check uses <linux/version.h>, so
 make sure that file was built correctly when installing the kernel header
 files.  To use kernel headers not from /usr/include/linux, use the
 configure option --with-headers.])
 fi

 # If the user gave a minimal version number test whether the available
 # kernel headers are young enough.  Additionally we have minimal
 # kernel versions for some architectures.  If a previous configure fragment
 # set arch_minimum_kernel already, let that override our defaults here.
 # Note that we presume such a fragment has set libc_cv_gcc_unwind_find_fde
 # if appropriate too.
 test -n "$arch_minimum_kernel" ||
 case "$machine" in
   alpha*)
     arch_minimum_kernel=2.1.100
     libc_cv_gcc_unwind_find_fde=yes
     ;;
   arm*)
     arch_minimum_kernel=2.0.10
     libc_cv_gcc_unwind_find_fde=yes
     ;;
   i386*)
     libc_cv_gcc_unwind_find_fde=yes
     arch_minimum_kernel=2.0.10
     ;;
   ia64*)
     arch_minimum_kernel=2.4.0
     ;;
   hppa*)
     libc_cv_gcc_unwind_find_fde=yes
     arch_minimum_kernel=2.4.19
     ;;
   m68k*)
     arch_minimum_kernel=2.0.10
     libc_cv_gcc_unwind_find_fde=yes
     ;;
   powerpc/powerpc32)
     libc_cv_gcc_unwind_find_fde=yes
     arch_minimum_kernel=2.0.10
     ;;
   powerpc/powerpc64)
     arch_minimum_kernel=2.4.21
     ;;
   s390/s390-32)
     libc_cv_gcc_unwind_find_fde=yes
     arch_minimum_kernel=2.2.10
     ;;
   s390/s390-64)
     libc_cv_gcc_unwind_find_fde=yes
     arch_minimum_kernel=2.4.0
     ;;
   sh*)
     arch_minimum_kernel=2.3.99
     libc_cv_gcc_unwind_find_fde=yes
     ;;
   sparc/sparc64*)
     libc_cv_gcc_unwind_find_fde=yes
     arch_minimum_kernel=2.4.21
     ;;
   sparc*)
     libc_cv_gcc_unwind_find_fde=yes
     arch_minimum_kernel=2.0.10
     ;;
   x86_64*)
     arch_minimum_kernel=2.4.0
     ;;
   *)
     arch_minimum_kernel=2.0.10
     ;;
 esac
 if test -n "$minimum_kernel"; then
   changequote(,)
   user_version=$((`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
   arch_version=$((`echo "$arch_minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
   changequote([,])
   if test $user_version -lt $arch_version; then
     AC_MSG_WARN([minimum kernel version reset to $arch_minimum_kernel])
     minimum_kernel=$arch_minimum_kernel
   fi
 else
   if test $arch_minimum_kernel != '2.0.10'; then
     minimum_kernel=$arch_minimum_kernel
   fi
 fi

 if test -n "$minimum_kernel"; then
   AC_MSG_CHECKING(for kernel header at least $minimum_kernel)
 changequote(,)dnl
   decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
   abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
 changequote([,])dnl
   AC_EGREP_CPP([eat flaming death], [#include <linux/version.h>
 #if LINUX_VERSION_CODE < $decnum
 eat flaming death
 #endif], libc_minimum_kernel='too old!', libc_minimum_kernel=ok)
   AC_MSG_RESULT($libc_minimum_kernel)
   if test "$libc_minimum_kernel" = ok; then
     AC_DEFINE_UNQUOTED(__LINUX_KERNEL_VERSION, $decnum)
     AC_DEFINE_UNQUOTED(__ABI_TAG_VERSION, $abinum)
   else
     AC_MSG_ERROR([*** The available kernel headers are older than the requested
 *** compatible kernel version])
   fi
 fi

 # The result of the above test for the use of the FDE code is invalid if
 # the user overrides the decision about the minimum ABI.
 if test "$oldest_abi" != default && test "2.2.4" \< "$oldest_abi"; then
   libc_cv_gcc_unwind_find_fde=no
 fi

 if test -n "$sysheaders"; then
   CPPFLAGS=$OLD_CPPFLAGS
 fi
 # The Linux filesystem standard prescribes where to place "essential"
 # files.  I.e., when the installation prefix is "/usr" we have to place
 # shared library objects and the configuration files on the root partition
 # in /lib and /etc.
 case "$prefix" in
 /usr | /usr/)
   # 64-bit libraries on bi-arch platforms go in /lib64 instead of /lib.
   # Allow earlier configure scripts to handle libc_cv_slibdir, libdir,
   # and libc_cv_localedir.
   test -n "$libc_cv_slibdir" || \
   case $machine in
   sparc/sparc64 | x86_64 | powerpc/powerpc64 | s390/s390-64)
     libc_cv_slibdir="/lib64"
     if test "$libdir" = '${exec_prefix}/lib'; then
       libdir='${exec_prefix}/lib64';
       # Locale data can be shared between 32bit and 64bit libraries
       libc_cv_localedir='${exec_prefix}/lib/locale'
     fi
     ;;
   *)
     libc_cv_slibdir="/lib"
     ;;
   esac
   # Allow the user to override the path with --sysconfdir
   if test $sysconfdir = '${prefix}/etc'; then
     libc_cv_sysconfdir=/etc
   else
     libc_cv_sysconfdir=$sysconfdir
    fi
   libc_cv_rootsbindir="/sbin"
   ;;
 esac

 # Under Linux the NPTL add-on should be available.
 case $add_ons in
   # It is available.  Good.
   *nptl*)
     nptl_missing=
     ;;
   *)
     nptl_missing=yes
     ;;
 esac

 if test "$nptl_missing"; then
   if test $enable_sanity = yes; then
     echo "\
 *** On GNU/Linux systems it is normal to compile GNU libc with the
 *** \`nptl' add-on.  Without that, the library will be
 *** incompatible with normal GNU/Linux systems.
 *** If you really mean to not use this add-on, run configure again
 *** using the extra parameter \`--disable-sanity-checks'."
     exit 1
   else
     echo "\
 *** WARNING: Are you sure you do not want to use the \`nptl'
 *** add-on?"
   fi
 fi

 if test "$prefix" = "/usr/local" -o "$prefix" = "/usr/local/" -o "$prefix" = "NONE"; then
   if test $enable_sanity = yes; then
     echo "\
 *** On GNU/Linux systems the GNU C Library should not be installed into
 *** /usr/local since this might make your system totally unusable.
 *** We strongly advise to use a different prefix.  For details read the FAQ.
 *** If you really mean to do this, run configure again using the extra
 *** parameter \`--disable-sanity-checks'."
     exit 1
   else
     echo "\
 *** WARNING: Do you really want to install the GNU C Library into /usr/local?
 *** This might make your system totally unusable, for details read the FAQ."
   fi
 fi


 # One Linux we use ldconfig.
 use_ldconfig=yes

 # We need some extensions to the `ldd' script.
 changequote(,)
 case "$machine" in
   i[3456]86* | m68*)
     ldd_rewrite_script=../sysdeps/unix/sysv/linux/ldd-rewrite.sed
     ;;
   ia64*)
     ldd_rewrite_script=../sysdeps/unix/sysv/linux/ia64/ldd-rewrite.sed
     ;;
   s390*)
     ldd_rewrite_script=../sysdeps/unix/sysv/linux/s390/ldd-rewrite.sed
     ;;
   sparc*)
     ldd_rewrite_script=../sysdeps/unix/sysv/linux/sparc/ldd-rewrite.sed
     ;;
   x86_64*)
     ldd_rewrite_script=../sysdeps/unix/sysv/linux/x86_64/ldd-rewrite.sed
     ;;
   powerpc*)
     ldd_rewrite_script=../sysdeps/unix/sysv/linux/powerpc/ldd-rewrite.sed
     ;;
   *)
     ;;
 esac
 changequote([,])

 if test $host = $build; then
   # If $prefix/include/{net,scsi} are symlinks, make install will
   # clobber what they're linked to (probably a kernel tree).
   # test -L ought to work on all Linux boxes.
   if test "x$prefix" != xNONE; then
     ac_prefix=$prefix
   else
     ac_prefix=$ac_default_prefix
   fi
   AC_MSG_CHECKING([for symlinks in ${ac_prefix}/include])
   ac_message=
   if test -L ${ac_prefix}/include/net; then
     ac_message="$ac_message
    ${ac_prefix}/include/net is a symlink"
   fi
   if test -L ${ac_prefix}/include/scsi; then
     ac_message="$ac_message
    ${ac_prefix}/include/scsi is a symlink"
   fi
   if test -n "$ac_message"; then
     AC_MSG_ERROR([$ac_message
 \`make install' will destroy the target of the link(s).
 Delete the links and re-run configure, or better still, move the entire
 ${ac_prefix}/include directory out of the way.])
   else
     AC_MSG_RESULT(ok)
   fi
 fi

 # We have inlined syscalls.
 AC_DEFINE(HAVE_INLINED_SYSCALLS)
	GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
	# Local configure fragment for sysdeps/unix/sysv/linux.

	# Don't bother trying to generate any glue code to be compatible with the
	# existing system library, because we are the only system library.
	inhibit_glue=yes

	define([LIBC_LINUX_VERSION],[2.0.10])dnl
	if test -n "$sysheaders"; then
	OLD_CPPFLAGS=$CPPFLAGS
	CPPFLAGS="$CPPFLAGS $SYSINCLUDES"
	fi
	define([libc_cv_linuxVER], [libc_cv_linux]patsubst(LIBC_LINUX_VERSION,[\.]))dnl
	AC_CACHE_CHECK(installed Linux kernel header files, libc_cv_linuxVER, [dnl
	AC_EGREP_CPP([eat flaming death], [#include <linux/version.h>
	#if !defined LINUX_VERSION_CODE \|\| LINUX_VERSION_CODE < ]dnl
	patsubst(LIBC_LINUX_VERSION,[^\([^.]\)\.\([^.]\)\.\([^.]*\)$],dnl
	[ (\1 65536+ \2 256+ \3) /* \1.\2.\3 */])[
	eat flaming death
	#endif],
	libc_cv_linuxVER='TOO OLD!',
	libc_cv_linuxVER='LIBC_LINUX_VERSION or later')])
	if test "$libc_cv_linuxVER" != 'LIBC_LINUX_VERSION or later'; then
	AC_MSG_ERROR([GNU libc requires kernel header files from
	Linux LIBC_LINUX_VERSION or later to be installed before configuring.
	The kernel header files are found usually in /usr/include/asm and
	/usr/include/linux; make sure these directories use files from
	Linux LIBC_LINUX_VERSION or later. This check uses <linux/version.h>, so
	make sure that file was built correctly when installing the kernel header
	files. To use kernel headers not from /usr/include/linux, use the
	configure option --with-headers.])
	fi

	# If the user gave a minimal version number test whether the available
	# kernel headers are young enough. Additionally we have minimal
	# kernel versions for some architectures. If a previous configure fragment
	# set arch_minimum_kernel already, let that override our defaults here.
	# Note that we presume such a fragment has set libc_cv_gcc_unwind_find_fde
	# if appropriate too.
	test -n "$arch_minimum_kernel" \|\|
	case "$machine" in
	alpha*)
	arch_minimum_kernel=2.1.100
	libc_cv_gcc_unwind_find_fde=yes
	;;
	arm*)
	arch_minimum_kernel=2.0.10
	libc_cv_gcc_unwind_find_fde=yes
	;;
	i386*)
	libc_cv_gcc_unwind_find_fde=yes
	arch_minimum_kernel=2.0.10
	;;
	ia64*)
	arch_minimum_kernel=2.4.0
	;;
	hppa*)
	libc_cv_gcc_unwind_find_fde=yes
	arch_minimum_kernel=2.4.19
	;;
	m68k*)
	arch_minimum_kernel=2.0.10
	libc_cv_gcc_unwind_find_fde=yes
	;;
	powerpc/powerpc32)
	libc_cv_gcc_unwind_find_fde=yes
	arch_minimum_kernel=2.0.10
	;;
	powerpc/powerpc64)
	arch_minimum_kernel=2.4.21
	;;
	s390/s390-32)
	libc_cv_gcc_unwind_find_fde=yes
	arch_minimum_kernel=2.2.10
	;;
	s390/s390-64)
	libc_cv_gcc_unwind_find_fde=yes
	arch_minimum_kernel=2.4.0
	;;
	sh*)
	arch_minimum_kernel=2.3.99
	libc_cv_gcc_unwind_find_fde=yes
	;;
	sparc/sparc64*)
	libc_cv_gcc_unwind_find_fde=yes
	arch_minimum_kernel=2.4.21
	;;
	sparc*)
	libc_cv_gcc_unwind_find_fde=yes
	arch_minimum_kernel=2.0.10
	;;
	x86_64*)
	arch_minimum_kernel=2.4.0
	;;
	*)
	arch_minimum_kernel=2.0.10
	;;
	esac
	if test -n "$minimum_kernel"; then
	changequote(,)
	user_version=$((`echo "$minimum_kernel.0.0.0" \| sed 's/\([0-9]\)\.\([0-9]\)\.\([0-9]\)./\1 \* 65536 + \2 \* 256 + \3/'`))
	arch_version=$((`echo "$arch_minimum_kernel.0.0.0" \| sed 's/\([0-9]\)\.\([0-9]\)\.\([0-9]\)./\1 \* 65536 + \2 \* 256 + \3/'`))
	changequote([,])
	if test $user_version -lt $arch_version; then
	AC_MSG_WARN([minimum kernel version reset to $arch_minimum_kernel])
	minimum_kernel=$arch_minimum_kernel
	fi
	else
	if test $arch_minimum_kernel != '2.0.10'; then
	minimum_kernel=$arch_minimum_kernel
	fi
	fi

	if test -n "$minimum_kernel"; then
	AC_MSG_CHECKING(for kernel header at least $minimum_kernel)
	changequote(,)dnl
	decnum=`echo "$minimum_kernel.0.0.0" \| sed 's/\([0-9]\)\.\([0-9]\)\.\([0-9]\)./(\1 * 65536 + \2 * 256 + \3)/'`;
	abinum=`echo "$minimum_kernel.0.0.0" \| sed 's/\([0-9]\)\.\([0-9]\)\.\([0-9]\)./\1,\2,\3/'`;
	changequote([,])dnl
	AC_EGREP_CPP([eat flaming death], [#include <linux/version.h>
	#if LINUX_VERSION_CODE < $decnum
	eat flaming death
	#endif], libc_minimum_kernel='too old!', libc_minimum_kernel=ok)
	AC_MSG_RESULT($libc_minimum_kernel)
	if test "$libc_minimum_kernel" = ok; then
	AC_DEFINE_UNQUOTED(__LINUX_KERNEL_VERSION, $decnum)
	AC_DEFINE_UNQUOTED(__ABI_TAG_VERSION, $abinum)
	else
	AC_MSG_ERROR([*** The available kernel headers are older than the requested
	*** compatible kernel version])
	fi
	fi

	# The result of the above test for the use of the FDE code is invalid if
	# the user overrides the decision about the minimum ABI.
	if test "$oldest_abi" != default && test "2.2.4" \< "$oldest_abi"; then
	libc_cv_gcc_unwind_find_fde=no
	fi

	if test -n "$sysheaders"; then
	CPPFLAGS=$OLD_CPPFLAGS
	fi
	# The Linux filesystem standard prescribes where to place "essential"
	# files. I.e., when the installation prefix is "/usr" we have to place
	# shared library objects and the configuration files on the root partition
	# in /lib and /etc.
	case "$prefix" in
	/usr \| /usr/)
	# 64-bit libraries on bi-arch platforms go in /lib64 instead of /lib.
	# Allow earlier configure scripts to handle libc_cv_slibdir, libdir,
	# and libc_cv_localedir.
	test -n "$libc_cv_slibdir" \|\| \
	case $machine in
	sparc/sparc64 \| x86_64 \| powerpc/powerpc64 \| s390/s390-64)
	libc_cv_slibdir="/lib64"
	if test "$libdir" = '${exec_prefix}/lib'; then
	libdir='${exec_prefix}/lib64';
	# Locale data can be shared between 32bit and 64bit libraries
	libc_cv_localedir='${exec_prefix}/lib/locale'
	fi
	;;
	*)
	libc_cv_slibdir="/lib"
	;;
	esac
	# Allow the user to override the path with --sysconfdir
	if test $sysconfdir = '${prefix}/etc'; then
	libc_cv_sysconfdir=/etc
	else
	libc_cv_sysconfdir=$sysconfdir
	fi
	libc_cv_rootsbindir="/sbin"
	;;
	esac

	# Under Linux the NPTL add-on should be available.
	case $add_ons in
	# It is available. Good.
	nptl)
	nptl_missing=
	;;
	*)
	nptl_missing=yes
	;;
	esac

	if test "$nptl_missing"; then
	if test $enable_sanity = yes; then
	echo "\
	*** On GNU/Linux systems it is normal to compile GNU libc with the
	*** \`nptl' add-on. Without that, the library will be
	*** incompatible with normal GNU/Linux systems.
	*** If you really mean to not use this add-on, run configure again
	*** using the extra parameter \`--disable-sanity-checks'."
	exit 1
	else
	echo "\
	*** WARNING: Are you sure you do not want to use the \`nptl'
	*** add-on?"
	fi
	fi

	if test "$prefix" = "/usr/local" -o "$prefix" = "/usr/local/" -o "$prefix" = "NONE"; then
	if test $enable_sanity = yes; then
	echo "\
	*** On GNU/Linux systems the GNU C Library should not be installed into
	*** /usr/local since this might make your system totally unusable.
	*** We strongly advise to use a different prefix. For details read the FAQ.
	*** If you really mean to do this, run configure again using the extra
	*** parameter \`--disable-sanity-checks'."
	exit 1
	else
	echo "\
	*** WARNING: Do you really want to install the GNU C Library into /usr/local?
	*** This might make your system totally unusable, for details read the FAQ."
	fi
	fi


	# One Linux we use ldconfig.
	use_ldconfig=yes

	# We need some extensions to the `ldd' script.
	changequote(,)
	case "$machine" in
	i[3456]86* \| m68*)
	ldd_rewrite_script=../sysdeps/unix/sysv/linux/ldd-rewrite.sed
	;;
	ia64*)
	ldd_rewrite_script=../sysdeps/unix/sysv/linux/ia64/ldd-rewrite.sed
	;;
	s390*)
	ldd_rewrite_script=../sysdeps/unix/sysv/linux/s390/ldd-rewrite.sed
	;;
	sparc*)
	ldd_rewrite_script=../sysdeps/unix/sysv/linux/sparc/ldd-rewrite.sed
	;;
	x86_64*)
	ldd_rewrite_script=../sysdeps/unix/sysv/linux/x86_64/ldd-rewrite.sed
	;;
	powerpc*)
	ldd_rewrite_script=../sysdeps/unix/sysv/linux/powerpc/ldd-rewrite.sed
	;;
	*)
	;;
	esac
	changequote([,])

	if test $host = $build; then
	# If $prefix/include/{net,scsi} are symlinks, make install will
	# clobber what they're linked to (probably a kernel tree).
	# test -L ought to work on all Linux boxes.
	if test "x$prefix" != xNONE; then
	ac_prefix=$prefix
	else
	ac_prefix=$ac_default_prefix
	fi
	AC_MSG_CHECKING([for symlinks in ${ac_prefix}/include])
	ac_message=
	if test -L ${ac_prefix}/include/net; then
	ac_message="$ac_message
	${ac_prefix}/include/net is a symlink"
	fi
	if test -L ${ac_prefix}/include/scsi; then
	ac_message="$ac_message
	${ac_prefix}/include/scsi is a symlink"
	fi
	if test -n "$ac_message"; then
	AC_MSG_ERROR([$ac_message
	\`make install' will destroy the target of the link(s).
	Delete the links and re-run configure, or better still, move the entire
	${ac_prefix}/include directory out of the way.])
	else
	AC_MSG_RESULT(ok)
	fi
	fi

	# We have inlined syscalls.
	AC_DEFINE(HAVE_INLINED_SYSCALLS)