79c38d7f7a
* sysdeps/unix/sysv/linux/configure.in: Check /lib/modules/`uname -r`/build/include for kernel headers.
302 lines
8.9 KiB
Plaintext
302 lines
8.9 KiB
Plaintext
# Local configure fragment for sysdeps/unix/sysv/linux.
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# The Linux kernel headers can be found in
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# /lib/modules/$(uname -r)/build/include
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# Check whether this directory is available.
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if test -z "$sysheaders" &&
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test -d /lib/modules/`uname -r`/build/include; then
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sysheaders="/lib/modules/`uname -r`/build/include"
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ccheaders=`$CC -print-file-name=include`
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SYSINCLUDES="-I $sysheaders"
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fi
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# Don't bother trying to generate any glue code to be compatible with the
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# existing system library, because we are the only system library.
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inhibit_glue=yes
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if test -n "$sysheaders"; then
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OLD_CPPFLAGS=$CPPFLAGS
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CPPFLAGS="$CPPFLAGS $SYSINCLUDES"
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fi
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echo $ac_n "checking installed Linux kernel header files""... $ac_c" 1>&6
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echo "configure:23: checking installed Linux kernel header files" >&5
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if eval "test \"`echo '$''{'libc_cv_linux2010'+set}'`\" = set"; then
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echo $ac_n "(cached) $ac_c" 1>&6
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else
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cat > conftest.$ac_ext <<EOF
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#line 28 "configure"
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#include "confdefs.h"
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#include <linux/version.h>
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#if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE < (2 *65536+ 0 *256+ 10) /* 2.0.10 */
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eat flaming death
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#endif
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EOF
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if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
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egrep "eat flaming death" >/dev/null 2>&1; then
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rm -rf conftest*
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libc_cv_linux2010='TOO OLD!'
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else
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rm -rf conftest*
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libc_cv_linux2010='2.0.10 or later'
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fi
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rm -f conftest*
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fi
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echo "$ac_t""$libc_cv_linux2010" 1>&6
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if test "$libc_cv_linux2010" != '2.0.10 or later'; then
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{ echo "configure: error: GNU libc requires kernel header files from
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Linux 2.0.10 or later to be installed before configuring.
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The kernel header files are found usually in /usr/include/asm and
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/usr/include/linux; make sure these directories use files from
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Linux 2.0.10 or later. This check uses <linux/version.h>, so
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make sure that file was built correctly when installing the kernel header
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files. To use kernel headers not from /usr/include/linux, use the
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configure option --with-headers." 1>&2; exit 1; }
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fi
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# If the user gave a minimal version number test whether the available
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# kernel headers are young enough. Additionally we have minimal
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# kernel versions for some architectures.
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case "$machine" in
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alpha*)
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arch_minimum_kernel=2.1.100
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libc_cv_gcc_unwind_find_fde=yes
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;;
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arm*)
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arch_minimum_kernel=2.0.10
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libc_cv_gcc_unwind_find_fde=yes
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;;
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i386*)
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libc_cv_gcc_unwind_find_fde=yes
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arch_minimum_kernel=2.0.10
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;;
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ia64*)
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arch_minimum_kernel=2.4.0
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;;
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hppa*)
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arch_minimum_kernel=2.3.99
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;;
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m68k*)
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arch_minimum_kernel=2.0.10
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libc_cv_gcc_unwind_find_fde=yes
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;;
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mips*)
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arch_minimum_kernel=2.4.0
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libc_cv_gcc_unwind_find_fde=yes
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;;
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powerpc*)
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libc_cv_gcc_unwind_find_fde=yes
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arch_minimum_kernel=2.0.10
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;;
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s390/s390-32)
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libc_cv_gcc_unwind_find_fde=yes
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arch_minimum_kernel=2.2.10
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;;
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s390/s390-64)
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libc_cv_gcc_unwind_find_fde=yes
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arch_minimum_kernel=2.4.0
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;;
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sh*)
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arch_minimum_kernel=2.3.99
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libc_cv_gcc_unwind_find_fde=yes
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;;
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sparc*)
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libc_cv_gcc_unwind_find_fde=yes
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arch_minimum_kernel=2.0.10
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;;
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x86_64*)
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arch_minimum_kernel=2.4.0
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;;
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*)
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arch_minimum_kernel=2.0.10
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;;
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esac
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if test -n "$minimum_kernel"; then
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user_version=$((`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
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arch_version=$((`echo "$arch_minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
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if test $user_version -lt $arch_version; then
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echo "configure: warning: minimum kernel version reset to $arch_minimum_kernel" 1>&2
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minimum_kernel=$arch_minimum_kernel
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fi
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else
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if test $arch_minimum_kernel != '2.0.10'; then
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minimum_kernel=$arch_minimum_kernel
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fi
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fi
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if test -n "$minimum_kernel"; then
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echo $ac_n "checking for kernel header at least $minimum_kernel""... $ac_c" 1>&6
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echo "configure:133: checking for kernel header at least $minimum_kernel" >&5
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decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
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abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
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cat > conftest.$ac_ext <<EOF
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#line 137 "configure"
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#include "confdefs.h"
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#include <linux/version.h>
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#if LINUX_VERSION_CODE < $decnum
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eat flaming death
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#endif
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EOF
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if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
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egrep "eat flaming death" >/dev/null 2>&1; then
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rm -rf conftest*
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libc_minimum_kernel='too old!'
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else
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rm -rf conftest*
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libc_minimum_kernel=ok
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fi
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rm -f conftest*
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echo "$ac_t""$libc_minimum_kernel" 1>&6
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if test "$libc_minimum_kernel" = ok; then
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cat >> confdefs.h <<EOF
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#define __LINUX_KERNEL_VERSION $decnum
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EOF
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cat >> confdefs.h <<EOF
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#define __ABI_TAG_VERSION $abinum
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EOF
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else
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{ echo "configure: error: *** The available kernel headers are older than the requested
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*** compatible kernel version" 1>&2; exit 1; }
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fi
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fi
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# The result of the above test for the use of the FDE code is invalid if
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# the user overrides the decision about the minimum ABI.
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if test "$oldest_abi" != default && test "2.2.4" \< "$oldest_abi"; then
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libc_cv_gcc_unwind_find_fde=no
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fi
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if test -n "$sysheaders"; then
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CPPFLAGS=$OLD_CPPFLAGS
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fi
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# The Linux filesystem standard prescribes where to place "essential"
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# files. I.e., when the installation prefix is "/usr" we have to place
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# shared library objects and the configuration files on the root partition
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# in /lib and /etc.
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if test "$prefix" = "/usr" -o "$prefix" = "/usr/"; then
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# 64bit libraries on sparc go to /lib64 and not /lib
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if test "$machine" = "sparc/sparc64" -o "$machine" = "x86_64"; then
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libc_cv_slibdir="/lib64"
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if test "$libdir" = '${exec_prefix}/lib'; then
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libdir='${exec_prefix}/lib64';
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# Locale data can be shared between 32bit and 64bit libraries
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libc_cv_localedir='${exec_prefix}/lib/locale'
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fi
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else
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libc_cv_slibdir="/lib"
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fi
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# Allow the user to override the path with --sysconfdir
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if test $sysconfdir = '${prefix}/etc'; then
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libc_cv_sysconfdir=/etc
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else
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libc_cv_sysconfdir=$sysconfdir
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fi
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libc_cv_rootsbindir="/sbin"
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fi
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# Under Linux the LinuxThreads add-on should be available.
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case $add_ons in
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# It is available. Good.
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*linuxthreads*)
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linuxthreads_missing=
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;;
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*)
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linuxthreads_missing=yes
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;;
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esac
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if test "$linuxthreads_missing"; then
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if test $enable_sanity = yes; then
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echo "\
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*** On GNU/Linux systems it is normal to compile GNU libc with the
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*** \`linuxthreads' add-on. Without that, the library will be
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*** incompatible with normal GNU/Linux systems.
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*** If you really mean to not use this add-on, run configure again
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*** using the extra parameter \`--disable-sanity-checks'."
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exit 1
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else
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echo "\
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*** WARNING: Are you sure you do not want to use the \`linuxthreads'
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*** add-on?"
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fi
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fi
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if test "$prefix" = "/usr/local" -o "$prefix" = "/usr/local/" -o "$prefix" = "NONE"; then
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if test $enable_sanity = yes; then
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echo "\
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*** On GNU/Linux systems the GNU C Library should not be installed into
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*** /usr/local since this might make your system totally unusable.
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*** We strongly advise to use a different prefix. For details read the FAQ.
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*** If you really mean to do this, run configure again using the extra
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*** parameter \`--disable-sanity-checks'."
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exit 1
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else
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echo "\
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*** WARNING: Do you really want to install the GNU C Library into /usr/local?
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*** This might make your system totally unusable, for details read the FAQ."
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fi
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fi
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# One Linux we use ldconfig.
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use_ldconfig=yes
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# We need some extensions to the `ldd' script.
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case "$machine" in
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i[3456]86* | m68*)
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ldd_rewrite_script=../sysdeps/unix/sysv/linux/ldd-rewrite.sed
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;;
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ia64*)
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ldd_rewrite_script=../sysdeps/unix/sysv/linux/ia64/ldd-rewrite.sed
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;;
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s390*)
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ldd_rewrite_script=../sysdeps/unix/sysv/linux/s390/ldd-rewrite.sed
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;;
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sparc*)
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ldd_rewrite_script=../sysdeps/unix/sysv/linux/sparc/ldd-rewrite.sed
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;;
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x86_64*)
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ldd_rewrite_script=../sysdeps/unix/sysv/linux/x86_64/ldd-rewrite.sed
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;;
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*)
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;;
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esac
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if test $host = $build; then
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# If $prefix/include/{net,scsi} are symlinks, make install will
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# clobber what they're linked to (probably a kernel tree).
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# test -L ought to work on all Linux boxes.
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if test "x$prefix" != xNONE; then
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ac_prefix=$prefix
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else
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ac_prefix=$ac_default_prefix
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fi
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echo $ac_n "checking for symlinks in ${ac_prefix}/include""... $ac_c" 1>&6
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echo "configure:284: checking for symlinks in ${ac_prefix}/include" >&5
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ac_message=
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if test -L ${ac_prefix}/include/net; then
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ac_message="$ac_message
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${ac_prefix}/include/net is a symlink"
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fi
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if test -L ${ac_prefix}/include/scsi; then
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ac_message="$ac_message
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${ac_prefix}/include/scsi is a symlink"
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fi
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if test -n "$ac_message"; then
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{ echo "configure: error: $ac_message
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\`make install' will destroy the target of the link(s).
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Delete the links and re-run configure, or better still, move the entire
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${ac_prefix}/include directory out of the way." 1>&2; exit 1; }
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else
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echo "$ac_t""ok" 1>&6
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fi
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fi
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