3 dnl Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
5 dnl This program is free software; you can redistribute it and/or modify
6 dnl it under the terms of the GNU General Public License as published by
7 dnl the Free Software Foundation; version 2 of the License.
9 dnl This program is distributed in the hope that it will be useful,
10 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
11 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 dnl GNU General Public License for more details.
14 dnl You should have received a copy of the GNU General Public License
15 dnl along with this program; if not, write to the Free Software
16 dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 dnl Usage: ENSC_SYSCALL
20 AC_DEFUN([ENSC_SYSCALL],
22 AC_REQUIRE([ENSC_KERNEL_HEADERS])
23 AC_MSG_CHECKING([for syscall(2) invocation method])
24 AC_ARG_WITH([syscall],
25 [AC_HELP_STRING([--with-syscall=METHOD],
26 [call syscall(2) with the specified METHOD; valid values are 'fast', 'traditional' and 'auto' (default: auto)])],
29 AC_MSG_RESULT([$with_syscall])
31 case x"$with_syscall" in
33 AC_CACHE_CHECK([which syscall(2) invocation works], [ensc_cv_test_syscall],
37 #include <asm/unistd.h>
46 inline static _syscall0(int, foo0)
47 inline static _syscall1(int, foo1, int, a)
48 inline static _syscall2(int, foo2, int, a, int, b)
49 inline static _syscall3(int, foo3, int, a, int, b, int, c)
50 inline static _syscall4(int, foo4, int, a, int, b, int, c, int, d)
51 inline static _syscall5(int, foo5, int, a, int, b, int, c, int, d, int, e)
62 [ensc_cv_test_syscall=fast],
63 [ensc_cv_test_syscall=traditional])
67 with_syscall=$ensc_cv_test_syscall
72 AC_MSG_ERROR(['$with_syscall' is not a valid value for '--with-syscall'])
76 if test x"$with_syscall" = xtraditional; then
77 AC_DEFINE(ENSC_SYSCALL_TRADITIONAL, 1, [Define to 1 when the fast syscall(2) invocation does not work])
81 #if defined(__pic__) && defined(__i386) && !defined(ENSC_SYSCALL_TRADITIONAL)
82 # define ENSC_SYSCALL_TRADITIONAL 1