util-vserver-0.30.208

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

diff --git a/m4/ensc_dietlibc_compat.m4 b/m4/ensc_dietlibc_compat.m4
new file mode 100644 (file)
index 0000000..30de1c2
--- /dev/null
+++ b/m4/ensc_dietlibc_compat.m4
@@ -0,0 +1,55 @@
+dnl $Id: ensc_dietlibc_compat.m4,v 1.4 2005/04/24 20:28:23 ensc Exp $
+
+dnl Copyright (C) 2004 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.
+
+AC_DEFUN([ENSC_DIETLIBC_NEED_COMPAT],
+[
+       AC_REQUIRE([ENSC_ENABLE_DIETLIBC])
+       AC_REQUIRE([ENSC_SYSCALL_ALTERNATIVE])
+       AC_CACHE_CHECK([whether dietlibc needs '-lcompat'], [ensc_cv_c_dietlibc_compat],
+       [
+               AC_LANG_PUSH(C)
+               ensc_dietlibc_need_compat_old_CC=$CC
+               CC="${DIET:-diet} $CC"
+               AC_LINK_IFELSE([
+                       AC_LANG_PROGRAM([
+#include "$srcdir/lib/syscall-wrap.h"
+#include <errno.h>
+
+#define __NR_foo0              42
+#define __NR_foo1              42
+#define __NR_foo2              42
+#define __NR_foo3              42
+#define __NR_foo4              42
+#define __NR_foo5              42
+inline static _syscall0(int, foo0)
+inline static _syscall1(int, foo1, int, a)
+inline static _syscall2(int, foo2, int, a, int, b)
+inline static _syscall3(int, foo3, int, a, int, b, int, c)
+inline static _syscall4(int, foo4, int, a, int, b, int, c, int, d)
+inline static _syscall5(int, foo5, int, a, int, b, int, c, int, d, int, e)
+],
+                       [foo0(); foo1(0); foo2(0,0); foo3(0,0,0); foo4(0,0,0,0); foo5(0,0,0,0,0);])],
+                       [ensc_cv_c_dietlibc_compat=no],
+                       [ensc_cv_c_dietlibc_compat=yes])
+               CC=$ensc_dietlibc_need_compat_old_CC
+               AC_LANG_POP
+       ])
+
+       if test x"$1" != x; then
+               AM_CONDITIONAL($1, test x"$ensc_cv_c_dietlibc_compat" = xyes)
+       fi
+])