diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/configure.ac')
| -rw-r--r-- | sysdeps/unix/sysv/linux/configure.ac | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/configure.ac b/sysdeps/unix/sysv/linux/configure.ac new file mode 100644 index 0000000000..5e5902d8ef --- /dev/null +++ b/sysdeps/unix/sysv/linux/configure.ac @@ -0,0 +1,215 @@ +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],[2.6.19])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 + i386*) + libc_cv_gcc_unwind_find_fde=yes + arch_minimum_kernel=2.6.16 + ;; + powerpc/powerpc32*) + libc_cv_gcc_unwind_find_fde=yes + arch_minimum_kernel=2.6.16 + ;; + s390/s390-32) + libc_cv_gcc_unwind_find_fde=yes + arch_minimum_kernel=2.6.16 + ;; + s390/s390-64) + libc_cv_gcc_unwind_find_fde=yes + arch_minimum_kernel=2.6.16 + ;; + sh*) + arch_minimum_kernel=2.6.16 + libc_cv_gcc_unwind_find_fde=yes + ;; + sparc/sparc64*) + libc_cv_gcc_unwind_find_fde=yes + arch_minimum_kernel=2.6.16 + ;; + sparc*) + libc_cv_gcc_unwind_find_fde=yes + arch_minimum_kernel=2.6.16 + ;; + *) + arch_minimum_kernel=2.6.16 + ;; +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 + 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_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, $abinum) +else + AC_MSG_ERROR([*** The available kernel headers are older than the requested +*** compatible kernel version]) +fi + +# The result of the above test for the use of the FDE code is invalid if +# the user overrides the decision about the minimum ABI. +if test "$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 $enable_sanity = yes; then + echo "\ +*** On GNU/Linux systems the GNU C Library should not be installed into +*** /usr/local since this might make your system totally unusable. +*** We strongly advise to use a different prefix. For details read the FAQ. +*** If you really mean to do this, run configure again using the extra +*** parameter \`--disable-sanity-checks'." + exit 1 + else + echo "\ +*** WARNING: Do you really want to install the GNU C Library into /usr/local? +*** This might make your system totally unusable, for details read the FAQ." + fi +fi + + +# One Linux we use ldconfig. +use_ldconfig=yes + +# We need some extensions to the `ldd' script. +changequote(,) +case "$machine" in + i[3456]86*) + ldd_rewrite_script=sysdeps/unix/sysv/linux/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) |