| 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 |
| ;; |
| x86_64/x32) |
| arch_minimum_kernel=3.4.0 |
| ;; |
| 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, $abinum) |
| else |
| AC_MSG_ERROR([*** The available kernel headers are older than the requested |
| *** compatible kernel version]) |
| fi |
| |
| # Until we start requiring 2.6.37+ headers, we need to check for the |
| # availability of linux/fanotify.h for testing purposes. |
| AC_CHECK_HEADER(linux/fanotify.h, |
| [AC_DEFINE(HAVE_LINUX_FANOTIFY_H)], , |
| [/* No default includes. */]) |
| |
| # The result of the above test for the use of the FDE code is invalid if |
| # the user overrides the decision about the minimum ABI. |
| if test "$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 $enable_sanity = yes; then |
| echo "\ |
| *** On GNU/Linux systems the GNU C Library should not be installed into |
| *** /usr/local since this might make your system totally unusable. |
| *** We strongly advise to use a different prefix. For details read the FAQ. |
| *** If you really mean to do this, run configure again using the extra |
| *** parameter \`--disable-sanity-checks'." |
| exit 1 |
| else |
| echo "\ |
| *** WARNING: Do you really want to install the GNU C Library into /usr/local? |
| *** This might make your system totally unusable, for details read the FAQ." |
| fi |
| fi |
| |
| |
| # One Linux we use ldconfig. |
| use_ldconfig=yes |
| |
| # We need some extensions to the `ldd' script. |
| changequote(,) |
| case "$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) |
