sysdeps/unix/sysv/linux/configure

   1  # Local configure fragment for sysdeps/unix/sysv/linux.
   2
   3 # On Linux, the default is to use libio instead of stdio.
   4 test $stdio = default && stdio=libio
   5
   6 # Don't bother trying to generate any glue code to be compatible with the
   7 # existing system library, because we are the only system library.
   8 inhibit_glue=yes
   9
  10 echo $ac_n "checking installed Linux kernel header files""... $ac_c" 1>&6
  11 if eval "test \"`echo '$''{'libc_cv_linux2010'+set}'`\" = set"; then
  12   echo $ac_n "(cached) $ac_c" 1>&6
  13 else
  14   cat > conftest.$ac_ext <<EOF
  15 #line 16 "configure"
  16 #include "confdefs.h"
  17 #include <linux/version.h>
  18 int main() { return 0; }
  19 int t() {
  20 #if LINUX_VERSION_CODE <  (2 *65536+ 0 *256+ 10) /* 2.0.10 */
  21 eat flaming death
  22 #endif
  23 ; return 0; }
  24 EOF
  25 if { (eval echo configure:26: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
  26   rm -rf conftest*
  27   libc_cv_linux2010='2.0.10 or later'
  28 else
  29   rm -rf conftest*
  30   libc_cv_linux2010='TOO OLD!'
  31 fi
  32 rm -f conftest*
  33
  34 fi
  35
  36 echo "$ac_t""$libc_cv_linux2010" 1>&6
  37 if test "$libc_cv_linux2010" != '2.0.10 or later'; then
  38   { echo "configure: error: GNU libc requires kernel header files from
  39 Linux 2.0.10 or later to be installed before configuring.
  40 The kernel header files are found usually in /usr/include/asm and
  41 /usr/include/linux; make sure these directories use files from
  42 Linux 2.0.10 or later.  This check uses <linux/version.h>, so
  43 make sure that file was built correctly when installing the kernel header
  44 files." 1>&2; exit 1; }
  45 fi
  46
  47 # The Linux filesystem standard prescribes where to place "essential"
  48 # files.  I.e., when the installation prefix is "/usr" we have to place
  49 # shared library objects and the configuation files on the root partition
  50 # in /lib and /etc.
  51 if test "$prefix" = "/usr"; then
  52   libc_cv_slibdir="/lib"
  53   libc_cv_sysconfdir="/etc"
  54 fi
  55
  56 # Under Linux the LinuxThreads and crypt add-on should be available.
  57 case $add_ons in
  58   # Both are available.  Good.
  59   *linuxthreads*des-crypt* | *des-crypt*linuxthreads*)
  60     ;;
  61   *linuxthreads*)
  62     echo "\
  63 *** WARNING:
  64 *** Are you sure you do not want to use the \`crypt' add-on?"
  65     ;;
  66   *des-crypt*)
  67     echo "\
  68 *** WARNING:
  69 *** Are you sure you do not want to use the \`LinuxThread' add-on?"
  70     ;;
  71   *)
  72     echo "\
  73 *** WARNING: Are you sure you do not want to use the \`LinuxThreads'
  74 *** and \`crypt' add-ons?"
  75     ;;
  76 esac