sysdeps/unix/sysv/linux/configure.in

   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.
   4
   5 # On Linux, the default is to use libio instead of stdio.
   6 test $stdio = default && stdio=libio
   7
   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.
  10 inhibit_glue=yes
  11
  12 define([LIBC_LINUX_VERSION],[2.0.10])dnl
  13 define([libc_cv_linuxVER], [libc_cv_linux]patsubst(LIBC_LINUX_VERSION,[\.]))dnl
  14 AC_CACHE_CHECK(installed Linux kernel header files, libc_cv_linuxVER, [dnl
  15 AC_TRY_COMPILE([#include <linux/version.h>],
  16 [#if LINUX_VERSION_CODE < ]dnl
  17 patsubst(LIBC_LINUX_VERSION,[^\([^.]*\)\.\([^.]*\)\.\([^.]*\)$],dnl
  18 [ (\1 *65536+ \2 *256+ \3) /* \1.\2.\3 */])[
  19 eat flaming death
  20 #endif],
  21                libc_cv_linuxVER='LIBC_LINUX_VERSION or later',
  22                libc_cv_linuxVER='TOO OLD!')])
  23 if test "$libc_cv_linuxVER" != 'LIBC_LINUX_VERSION or later'; then
  24   AC_MSG_ERROR([GNU libc requires kernel header files from
  25 Linux LIBC_LINUX_VERSION or later to be installed before configuring.
  26 The kernel header files are found usually in /usr/include/asm and
  27 /usr/include/linux; make sure these directories use files from
  28 Linux LIBC_LINUX_VERSION or later.  This check uses <linux/version.h>, so
  29 make sure that file was built correctly when installing the kernel header
  30 files.])
  31 fi
  32
  33 # The Linux filesystem standard prescribes where to place "essential"
  34 # files.  I.e., when the installation prefix is "/usr" we have to place
  35 # shared library objects and the configuration files on the root partition
  36 # in /lib and /etc.
  37 if test "$prefix" = "/usr"; then
  38   libc_cv_slibdir="/lib"
  39   libc_cv_sysconfdir="/etc"
  40   libc_cv_rootsbindir="/sbin"
  41 fi
  42
  43 # Under Linux the LinuxThreads and crypt add-on should be available.
  44 case $add_ons in
  45   # Both are available.  Good.
  46   *linuxthreads*crypt* | *crypt*linuxthreads*)
  47     message=
  48     ;;
  49   *linuxthreads*)
  50     message="\
  51 *** WARNING:
  52 *** Are you sure you do not want to use the \`crypt' add-on?"
  53     ;;
  54   *crypt*)
  55     message="\
  56 *** WARNING:
  57 *** Are you sure you do not want to use the \`linuxthread' add-on?"
  58     ;;
  59   *)
  60     message="\
  61 *** WARNING: Are you sure you do not want to use the \`linuxthreads'
  62 *** and \`crypt' add-ons?"
  63     ;;
  64 esac
  65
  66 if test "$message"; then
  67   if test $enable_sanity = yes; then
  68     echo "\
  69 *** You should not compile the GNU libc without the \`linuxthreads' and
  70 *** \`crypt' add-on.  Not using them risks to be incompatible with the
  71 *** libraries of other systems.  Consider getting the add-ons and restart
  72 *** the configuration.
  73 *** If you really mean to avoid those add-ons run configure again, now
  74 *** using the extra parameter \`--disable-sanity-checks'."
  75     exit 1
  76   else
  77     echo "$message"
  78   fi
  79 fi
  80
  81 # Check whether `ldconfig' sources are available.  This will go away as soon
  82 # as ldconfig is available in GNU libc.
  83 if test -f $srcdir/elf/ldconfig.c; then
  84   has_ldconfig=yes
  85 fi
  86
  87 # We need some extensions to the `ldd' script.
  88 changequote(,)
  89 case "$machine" in
  90   i[3456]86* | m68k | sparc/sparc32)
  91     ldd_rewrite_script=../sysdeps/unix/sysv/linux/ldd-rewrite.sed
  92     ;;
  93   *)
  94     ;;
  95 esac
  96 changequote([,])