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_linux2'+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+ 0) /* 2.0.0 */
  21 eat flaming death
  22 #endif
  23 ; return 0; }
  24 EOF
  25 if { (eval echo configure:26: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
  26   rm -rf conftest*
  27   libc_cv_linux2='2.0 or later'
  28 else
  29   rm -rf conftest*
  30   libc_cv_linux2='TOO OLD!'
  31 fi
  32 rm -f conftest*
  33
  34 fi
  35
  36 echo "$ac_t""$libc_cv_linux2" 1>&6
  37 if test "$libc_cv_linux2" != '2.0 or later'; then
  38   { echo "configure: error: GNU libc requires kernel header files from Linux 2.0
  39 or later to be installed before configuring.  The kernel header files
  40 are found usually in /usr/include/asm and /usr/include/linux; make sure
  41 these directories use files from Linux 2.0 or later.  This check uses
  42 <linux/version.h>, so make sure that file was built correctly when
  43 installing the kernel header files." 1>&2; exit 1; }
  44 fi