+++ /dev/null
-dnl $Id: ensc_syscall.m4 2194 2005-10-28 17:51:48Z ensc $
-
-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.
-
-dnl Usage: ENSC_SYSCALL
-
-AC_DEFUN([ENSC_SYSCALL_ALTERNATIVE],
-[
- AC_MSG_CHECKING([whether to use alternative _syscallX macros])
- AC_ARG_ENABLE([alternative-syscalls],
- [AC_HELP_STRING([--disable-alternative-syscalls],
- [do not use the alternative _syscallX macros
- provided by Herbert Poetzl (default: use them)])],
- [case $enableval in
- (yes|no) ensc_use_alternative_syscall_macros=$enableval;;
- (*) AC_MSG_ERROR(['$enableval' is not a valid value for '--disable-alternative-syscalls']);;
- esac],
- [ensc_use_alternative_syscall_macros=yes])
-
- case $ensc_use_alternative_syscall_macros in
- (yes) AC_DEFINE(ENSC_USE_ALTERNATIVE_SYSCALL_MACROS, 1, [Use alternative _syscallX macros]);;
- esac
-
- AC_MSG_RESULT([$ensc_use_alternative_syscall_macros])
-])
-
-AC_DEFUN([ENSC_SYSCALL],
-[
- AC_REQUIRE([ENSC_SYSCALL_ALTERNATIVE])
-
- AC_MSG_CHECKING([for syscall(2) invocation method])
- AC_ARG_WITH([syscall],
- [AC_HELP_STRING([--with-syscall=METHOD],
- [call syscall(2) with the specified METHOD; valid values are 'fast', 'traditional' and 'auto' (default: auto)])],
- [],
- [with_syscall=auto])
- AC_MSG_RESULT([$with_syscall])
-
- case x"$with_syscall" in
- (xauto)
- AC_CACHE_CHECK([which syscall(2) invocation works], [ensc_cv_test_syscall],
- [
- AC_LANG_PUSH(C)
- AC_COMPILE_IFELSE(AC_LANG_SOURCE([
-#include "$srcdir/lib/syscall-wrap.h"
-#include <errno.h>
-
-#define __NR_foo0 300
-#define __NR_foo1 301
-#define __NR_foo2 302
-#define __NR_foo3 303
-#define __NR_foo4 304
-#define __NR_foo5 305
-inline static _syscall0(int, foo0)
-inline static _syscall1(int, foo1, int, a)
-inline static _syscall2(int, foo2, int, a, int, b)
-inline static _syscall3(int, foo3, int, a, int, b, int, c)
-inline static _syscall4(int, foo4, int, a, int, b, int, c, int, d)
-inline static _syscall5(int, foo5, int, a, int, b, int, c, int, d, int, e)
-
-int main() {
- return foo0() || \
- foo1(1) || \
- foo2(1,2) || \
- foo3(1,2,3) || \
- foo4(1,2,3,4) || \
- foo5(1,2,3,4,5);
-}
- ]),
- [ensc_cv_test_syscall=fast],
- [ensc_cv_test_syscall=traditional])
-
- AC_LANG_POP
- ])
- with_syscall=$ensc_cv_test_syscall
- ;;
- (xfast|xtraditional)
- ;;
- *)
- AC_MSG_ERROR(['$with_syscall' is not a valid value for '--with-syscall'])
- ;;
- esac
-
- if test x"$with_syscall $ensc_use_alternative_syscall_macros" = 'xfast yes'; then
- with_syscall='alternative'
- fi
-
- if test x"$with_syscall" = xtraditional; then
- AC_DEFINE(ENSC_SYSCALL_TRADITIONAL, 1, [Define to 1 when the fast syscall(2) invocation does not work])
- fi
-
- AH_BOTTOM([
-#if defined(__pic__) && defined(__i386) && !defined(ENSC_SYSCALL_TRADITIONAL) && !defined(ENSC_USE_ALTERNATIVE_SYSCALL_MACROS)
-# define ENSC_SYSCALL_TRADITIONAL 1
-#endif])
-])
git://git.onelab.eu / util-vserver.git / blobdiff