mirror of
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219 lines
7.0 KiB
Plaintext
219 lines
7.0 KiB
Plaintext
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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# Local configure fragment for sysdeps/unix/sysv/linux.
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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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define([LIBC_LINUX_VERSION],[2.6.19])dnl
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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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define([libc_cv_linuxVER], [libc_cv_linux]patsubst(LIBC_LINUX_VERSION,[\.]))dnl
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AC_CACHE_CHECK(installed Linux kernel header files, libc_cv_linuxVER, [dnl
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AC_EGREP_CPP([eat flaming death], [#include <linux/version.h>
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#if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE < ]dnl
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patsubst(LIBC_LINUX_VERSION,[^\([^.]*\)\.\([^.]*\)\.\([^.]*\)$],dnl
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[ (\1 *65536+ \2 *256+ \3) /* \1.\2.\3 */])[
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eat flaming death
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#endif],
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libc_cv_linuxVER='TOO OLD!',
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libc_cv_linuxVER='LIBC_LINUX_VERSION or later')])
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if test "$libc_cv_linuxVER" != 'LIBC_LINUX_VERSION or later'; then
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AC_MSG_ERROR([GNU libc requires kernel header files from
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Linux LIBC_LINUX_VERSION 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 LIBC_LINUX_VERSION 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.])
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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. If a previous configure fragment
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# set arch_minimum_kernel already, let that override our defaults here.
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# Note that we presume such a fragment has set libc_cv_gcc_unwind_find_fde
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# if appropriate too.
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test -n "$arch_minimum_kernel" ||
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case "$machine" in
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i386*)
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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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powerpc/powerpc32)
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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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powerpc/powerpc64)
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arch_minimum_kernel=2.4.21
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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=2.4.0
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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=2.4.0
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libc_cv_gcc_unwind_find_fde=yes
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;;
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sparc/sparc64*)
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libc_cv_gcc_unwind_find_fde=yes
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arch_minimum_kernel=2.4.21
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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=2.4.0
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;;
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*)
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arch_minimum_kernel=2.4.0
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;;
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esac
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if test -n "$minimum_kernel"; then
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changequote(,)
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user_version=$((`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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changequote([,])
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if test $user_version -lt $arch_version; then
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AC_MSG_WARN([minimum kernel version reset to $arch_minimum_kernel])
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minimum_kernel=$arch_minimum_kernel
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fi
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else
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minimum_kernel=$arch_minimum_kernel
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fi
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AC_MSG_CHECKING(for kernel header at least $minimum_kernel)
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changequote(,)dnl
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decnum=`echo "$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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changequote([,])dnl
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AC_EGREP_CPP([eat flaming death], [#include <linux/version.h>
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#if LINUX_VERSION_CODE < $decnum
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eat flaming death
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#endif], libc_minimum_kernel='too old!', libc_minimum_kernel=ok)
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AC_MSG_RESULT($libc_minimum_kernel)
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if test "$libc_minimum_kernel" = ok; then
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AC_DEFINE_UNQUOTED(__LINUX_KERNEL_VERSION, $decnum)
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AC_DEFINE_UNQUOTED(__ABI_TAG_VERSION, $abinum)
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else
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AC_MSG_ERROR([*** The available kernel headers are older than the requested
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*** compatible kernel version])
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fi
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# The result of the above test for the use of the FDE code is invalid if
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# the user overrides the decision about the minimum ABI.
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if test "$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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# Under Linux the NPTL add-on should be available.
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case $add_ons in
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# It is available. Good.
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*nptl*)
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nptl_missing=
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;;
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*)
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nptl_missing=yes
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;;
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esac
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if test "$nptl_missing"; then
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if test $enable_sanity = yes; then
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echo "\
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*** On GNU/Linux systems it is normal to compile GNU libc with the
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*** \`nptl' add-on. Without that, the library will be
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*** incompatible with normal GNU/Linux systems.
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*** If you really mean to not use this add-on, run configure again
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*** using the extra parameter \`--disable-sanity-checks'."
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exit 1
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else
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echo "\
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*** WARNING: Are you sure you do not want to use the \`nptl'
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*** add-on?"
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fi
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fi
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if test "$prefix" = "/usr/local" -o "$prefix" = "/usr/local/" -o "$prefix" = "NONE"; then
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if test $enable_sanity = yes; then
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echo "\
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*** On GNU/Linux systems the GNU C Library should not be installed into
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*** /usr/local since this might make your system totally unusable.
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*** We strongly advise to use a different prefix. For details read the FAQ.
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*** If you really mean to do this, run configure again using the extra
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*** parameter \`--disable-sanity-checks'."
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exit 1
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else
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echo "\
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*** WARNING: Do you really want to install the GNU C Library into /usr/local?
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*** This might make your system totally unusable, for details read the FAQ."
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fi
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fi
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# One Linux we use ldconfig.
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use_ldconfig=yes
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# We need some extensions to the `ldd' script.
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changequote(,)
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case "$machine" in
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i[3456]86*)
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ldd_rewrite_script=sysdeps/unix/sysv/linux/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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powerpc*)
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ldd_rewrite_script=sysdeps/unix/sysv/linux/powerpc/ldd-rewrite.sed
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;;
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*)
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;;
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esac
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changequote([,])
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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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AC_MSG_CHECKING([for symlinks in ${ac_prefix}/include])
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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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AC_MSG_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.])
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else
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AC_MSG_RESULT(ok)
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fi
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fi
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# We have inlined syscalls.
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AC_DEFINE(HAVE_INLINED_SYSCALLS)
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