Update.

1998-08-12  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/unix/sysv/linux/configure.in: Obey --with-headers,
	document it.

	* sysdeps/unix/sysv/linux/alpha/configure.in: New file, contains
	test for recent Linux 2.1.100+ headers.

1 files changed, 51 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/alpha/configure b/sysdeps/unix/sysv/linux/alpha/configure
new file mode 100755
index 0000000000..5b36e71719
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/alpha/configure
@@ -0,0 +1,51 @@
+ # Local configure fragment for sysdeps/unix/sysv/linux/alpha.
+
+# Don't bother trying to generate any glue code to be compatible with the
+# existing system library, because we are the only system library.
+inhibit_glue=yes
+
+if test -n "$sysheaders"; then
+  OLD_CFLAGS=$CFLAGS
+  CFLAGS="$CFLAGS $SYSINCLUDES"
+fi
+echo $ac_n "checking installed Linux kernel header files""... $ac_c" 1>&6
+echo "configure:13: checking installed Linux kernel header files" >&5
+if eval "test \"`echo '$''{'libc_cv_linux21100'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 18 "configure"
+#include "confdefs.h"
+#include <linux/version.h>
+int main() {
+#if LINUX_VERSION_CODE <  (2 *65536+ 1 *256+ 100) /* 2.1.100 */
+eat flaming death
+#endif
+; return 0; }
+EOF
+if { (eval echo configure:27: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  libc_cv_linux21100='2.1.100 or later'
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  libc_cv_linux21100='TOO OLD!'
+fi
+rm -f conftest*
+fi
+
+echo "$ac_t""$libc_cv_linux21100" 1>&6
+if test "$libc_cv_linux21100" != '2.1.100 or later'; then
+  { echo "configure: error: GNU libc requires kernel header files from
+Linux 2.1.100 or later to be installed before configuring.
+The kernel header files are found usually in /usr/include/asm and
+/usr/include/linux; make sure these directories use files from
+Linux 2.1.100 or later.  This check uses <linux/version.h>, so
+make sure that file was built correctly when installing the kernel header
+files.  To use kernel headers not from /usr/include/linux, use the
+configure option --with-headers." 1>&2; exit 1; }
+fi
+if test -n "$sysheaders"; then
+  CFLAGS=$OLD_CFLAGS
+fi