1 sinclude(./aclocal.m4)dnl Autoconf lossage
2 GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
3 # Local configure fragment for sysdeps/unix/sysv/linux.
5 # On Linux, the default is to use libio instead of stdio.
6 test $stdio = default && stdio=libio
8 # Don't bother trying to generate any glue code to be compatible with the
9 # existing system library, because we are the only system library.
12 define([LIBC_LINUX_VERSION],[2.0.10])dnl
13 if test -n "$sysheaders"; then
14 OLD_CPPFLAGS=$CPPFLAGS
15 CPPFLAGS="$CPPFLAGS $SYSINCLUDES"
17 define([libc_cv_linuxVER], [libc_cv_linux]patsubst(LIBC_LINUX_VERSION,[\.]))dnl
18 AC_CACHE_CHECK(installed Linux kernel header files, libc_cv_linuxVER, [dnl
19 AC_EGREP_CPP([eat flaming death], [#include <linux/version.h>
20 #if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE < ]dnl
21 patsubst(LIBC_LINUX_VERSION,[^\([^.]*\)\.\([^.]*\)\.\([^.]*\)$],dnl
22 [ (\1 *65536+ \2 *256+ \3) /* \1.\2.\3 */])[
25 libc_cv_linuxVER='TOO OLD!',
26 libc_cv_linuxVER='LIBC_LINUX_VERSION or later')])
27 if test "$libc_cv_linuxVER" != 'LIBC_LINUX_VERSION or later'; then
28 AC_MSG_ERROR([GNU libc requires kernel header files from
29 Linux LIBC_LINUX_VERSION or later to be installed before configuring.
30 The kernel header files are found usually in /usr/include/asm and
31 /usr/include/linux; make sure these directories use files from
32 Linux LIBC_LINUX_VERSION or later. This check uses <linux/version.h>, so
33 make sure that file was built correctly when installing the kernel header
34 files. To use kernel headers not from /usr/include/linux, use the
35 configure option --with-headers.])
38 # If the user gave a minimal version number test whether the available
39 # kernel headers are young enough. Additionally we have minimal
40 # kernel versions for some architectures.
43 arch_minimum_kernel=2.1.100
44 libc_cv_gcc_unwind_find_fde=yes
47 libc_cv_gcc_unwind_find_fde=yes
48 arch_minimum_kernel=2.0.10
51 arch_minimum_kernel=2.4.0
54 arch_minimum_kernel=2.3.99
57 arch_minimum_kernel=2.2.15
58 libc_cv_gcc_unwind_find_fde=yes
61 libc_cv_gcc_unwind_find_fde=yes
62 arch_minimum_kernel=2.0.10
65 arch_minimum_kernel=2.3.99
66 libc_cv_gcc_unwind_find_fde=yes
69 libc_cv_gcc_unwind_find_fde=yes
70 arch_minimum_kernel=2.0.10
73 arch_minimum_kernel=2.4.0
76 arch_minimum_kernel=2.0.10
79 if test -n "$minimum_kernel"; then
81 user_version=$((`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
82 arch_version=$((`echo "$arch_minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
84 if test $user_version -lt $arch_version; then
85 AC_MSG_WARN([minimum kernel version reset to $arch_minimum_kernel])
86 minimum_kernel=$arch_minimum_kernel
89 if test $arch_minimum_kernel != '2.0.10'; then
90 minimum_kernel=$arch_minimum_kernel
94 if test -n "$minimum_kernel"; then
95 AC_MSG_CHECKING(for kernel header at least $minimum_kernel)
97 decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
98 abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
100 AC_EGREP_CPP([eat flaming death], [#include <linux/version.h>
101 #if LINUX_VERSION_CODE < $decnum
103 #endif], libc_minimum_kernel='too old!', libc_minimum_kernel=ok)
104 AC_MSG_RESULT($libc_minimum_kernel)
105 if test "$libc_minimum_kernel" = ok; then
106 AC_DEFINE_UNQUOTED(__LINUX_KERNEL_VERSION, $decnum)
107 AC_DEFINE_UNQUOTED(__ABI_TAG_VERSION, $abinum)
109 AC_MSG_ERROR([*** The available kernel headers are older than the requested
110 *** compatible kernel version])
114 # The result of the above test for the use of the FDE code is invalid if
115 # the user overrides the decision about the minimum ABI.
116 if test "$oldest_abi" != default && test "2.2.4" \< "$oldest_abi"; then
117 libc_cv_gcc_unwind_find_fde=no
120 if test -n "$sysheaders"; then
121 CPPFLAGS=$OLD_CPPFLAGS
123 # The Linux filesystem standard prescribes where to place "essential"
124 # files. I.e., when the installation prefix is "/usr" we have to place
125 # shared library objects and the configuration files on the root partition
127 if test "$prefix" = "/usr" -o "$prefix" = "/usr/"; then
128 # 64bit libraries on sparc go to /lib64 and not /lib
129 if test "$machine" = "sparc/sparc64" -o "$machine" = "x86_64"; then
130 libc_cv_slibdir="/lib64"
131 if test "$libdir" = '${exec_prefix}/lib'; then
132 libdir='${exec_prefix}/lib64';
133 # Locale data can be shared between 32bit and 64bit libraries
134 libc_cv_localedir='${exec_prefix}/lib/locale'
137 libc_cv_slibdir="/lib"
139 # Allow the user to override the path with --sysconfdir
140 if test $sysconfdir = '${prefix}/etc'; then
141 libc_cv_sysconfdir=/etc
143 libc_cv_sysconfdir=$sysconfdir
145 libc_cv_rootsbindir="/sbin"
148 # Under Linux the LinuxThreads add-on should be available.
150 # It is available. Good.
152 linuxthreads_missing=
155 linuxthreads_missing=yes
159 if test "$linuxthreads_missing"; then
160 if test $enable_sanity = yes; then
162 *** On GNU/Linux systems it is normal to compile GNU libc with the
163 *** \`linuxthreads' add-on. Without that, the library will be
164 *** incompatible with normal GNU/Linux systems.
165 *** If you really mean to not use this add-on, run configure again
166 *** using the extra parameter \`--disable-sanity-checks'."
170 *** WARNING: Are you sure you do not want to use the \`linuxthreads'
175 # One Linux we use ldconfig.
178 # We need some extensions to the `ldd' script.
182 ldd_rewrite_script=../sysdeps/unix/sysv/linux/ldd-rewrite.sed
185 ldd_rewrite_script=../sysdeps/unix/sysv/linux/ia64/ldd-rewrite.sed
188 ldd_rewrite_script=../sysdeps/unix/sysv/linux/s390/ldd-rewrite.sed
191 ldd_rewrite_script=../sysdeps/unix/sysv/linux/sparc/ldd-rewrite.sed
194 ldd_rewrite_script=../sysdeps/unix/sysv/linux/x86_64/ldd-rewrite.sed
201 if test $host = $build; then
202 # If $prefix/include/{net,scsi} are symlinks, make install will
203 # clobber what they're linked to (probably a kernel tree).
204 # test -L ought to work on all Linux boxes.
205 if test "x$prefix" != xNONE; then
208 ac_prefix=$ac_default_prefix
210 AC_MSG_CHECKING([for symlinks in ${ac_prefix}/include])
212 if test -L ${ac_prefix}/include/net; then
213 ac_message="$ac_message
214 ${ac_prefix}/include/net is a symlink"
216 if test -L ${ac_prefix}/include/scsi; then
217 ac_message="$ac_message
218 ${ac_prefix}/include/scsi is a symlink"
220 if test -n "$ac_message"; then
221 AC_MSG_ERROR([$ac_message
222 \`make install' will destroy the target of the link(s).
223 Delete the links and re-run configure, or better still, move the entire
224 ${ac_prefix}/include directory out of the way.])