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|
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/unix/sysv/linux.
define([LIBC_LINUX_VERSION],[2.6.32])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_TRY_COMPILE([#include <linux/version.h>
#if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE < ]dnl
patsubst(LIBC_LINUX_VERSION,[^\([^.]*\)\.\([^.]*\)\.\([^.]*\)$],dnl
[ (\1 *65536+ \2 *256+ \3) /* \1.\2.\3 */])[
# error kernel headers missing or too old
#endif], [],
[libc_cv_linuxVER='LIBC_LINUX_VERSION or later'],
[libc_cv_linuxVER='missing or too old!'])])
if test "$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 "$arch_minimum_kernel" || arch_minimum_kernel=2.6.32
if test -n "$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
minimum_kernel=$arch_minimum_kernel
fi
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_TRY_COMPILE([#include <linux/version.h>
#if LINUX_VERSION_CODE < $decnum
# error kernel headers too old
#endif], [], [libc_minimum_kernel=ok], [libc_minimum_kernel='too old!'])
AC_MSG_RESULT($libc_minimum_kernel)
if test "$libc_minimum_kernel" = ok; then
AC_DEFINE_UNQUOTED(__LINUX_KERNEL_VERSION, $decnum)
AC_DEFINE_UNQUOTED(__ABI_TAG_VERSION, $abinum)
else
AC_MSG_ERROR([*** The available kernel headers are older than the requested
*** compatible kernel version])
fi
# Until we start requiring 2.6.37+ headers, we need to check for the
# availability of linux/fanotify.h for testing purposes.
AC_CHECK_HEADER(linux/fanotify.h,
[AC_DEFINE(HAVE_LINUX_FANOTIFY_H)], ,
[/* No default includes. */])
# The result of the above test for the use of the FDE code is invalid if
# the user overrides the decision about the minimum ABI.
if test "$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
# 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
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)
|
