backing out to version 208 of util-vserver

[util-vserver.git] / m4 / ensc_kerneldir.m4

diff --git a/m4/ensc_kerneldir.m4 b/m4/ensc_kerneldir.m4
new file mode 100644 (file)
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+++ b/m4/ensc_kerneldir.m4
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+dnl $Id: ensc_kerneldir.m4,v 1.3 2004/02/14 01:20:35 ensc Exp $
+
+dnl Copyright (C) 2002 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
+dnl  
+dnl This program is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; version 2 of the License.
+dnl  
+dnl This program is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl  
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program; if not, write to the Free Software
+dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+dnl Usage: ENSC_KERNEL_HEADERS(<var>)
+dnl        <var> ... basedir of kernel-headers (without the '/linux');
+dnl                  this value will be AC_SUBST'ed
+
+AC_DEFUN([_ENSC_KERNEL_DIR],
+[
+       AC_CACHE_CHECK([for linux kernel dir], [ensc_cv_path_kerneldir],
+        [
+AC_ARG_WITH([kerneldir],
+           [AC_HELP_STRING([--with-kerneldir=DIR],
+                           [assume kernelsources in DIR (default: /lib/modules/<current>/build)])],
+            [case "$withval" in
+               yes|no) AC_MSG_ERROR(['$withval' is not a valid value for kerneldir]);;
+               *)      ensc_cv_path_kerneldir=$withval;;
+            esac],
+           [ensc_cv_path_kerneldir=
+            for i in /lib/modules/$(uname -r)/build /usr/src/linux /usr; do
+               test -e $i/include/linux/version.h && { ensc_cv_path_kerneldir=$i; break; }
+            done])
+       ])
+
+       test "$ensc_cv_path_kerneldir" -a -e "$ensc_cv_path_kerneldir"/include/linux/version.h || {
+               AC_MSG_ERROR([Can not find kernelsources])
+       }
+])
+
+AC_DEFUN([ENSC_KERNEL_HEADERS],
+[
+       AC_REQUIRE([_ENSC_KERNEL_DIR])
+
+       AC_CACHE_CHECK([for linux kernel headers], [ensc_cv_path_kernelheaders],
+       [
+               ensc_cv_path_kernelheaders=$ensc_cv_path_kerneldir/include
+       ])
+
+       if test x"$1" != x; then
+               $1=$ensc_cv_path_kernelheaders
+               AC_SUBST($1)
+       fi
+])