1 # gnulib-common.m4 serial 3
2 dnl Copyright (C) 2007 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 # gl_MODULE_INDICATOR([modulename])
8 # defines a C macro indicating the presence of the given module.
9 AC_DEFUN([gl_MODULE_INDICATOR],
11 AC_DEFINE([GNULIB_]translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1],
12 [Define to 1 when using the gnulib module ]$1[.])
16 # is a backport of autoconf-2.60's AC_PROG_MKDIR_P.
17 # Remove this macro when we can assume autoconf >= 2.60.
18 m4_ifdef([AC_PROG_MKDIR_P], [], [
19 AC_DEFUN([AC_PROG_MKDIR_P],
20 [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake
22 AC_SUBST([MKDIR_P])])])
25 # This definition overrides the AC_C_RESTRICT macro from autoconf 2.60..2.61,
26 # so that mixed use of GNU C and GNU C++ and mixed use of Sun C and Sun C++
28 # This definition can be removed once autoconf >= 2.62 can be assumed.
29 AC_DEFUN([AC_C_RESTRICT],
30 [AC_CACHE_CHECK([for C/C++ restrict keyword], ac_cv_c_restrict,
32 # The order here caters to the fact that C++ does not require restrict.
33 for ac_kw in __restrict __restrict__ _Restrict restrict; do
34 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
35 [[typedef int * int_ptr;
36 int foo (int_ptr $ac_kw ip) {
43 [ac_cv_c_restrict=$ac_kw])
44 test "$ac_cv_c_restrict" != no && break
47 AH_VERBATIM([restrict],
48 [/* Define to the equivalent of the C99 'restrict' keyword, or to
49 nothing if this is not supported. Do not define if restrict is
50 supported directly. */
52 /* Work around a bug in Sun C++: it does not support _Restrict, even
53 though the corresponding Sun C compiler does, which causes
54 "#define restrict _Restrict" in the previous line. Perhaps some future
55 version of Sun C++ will work with _Restrict; if so, it'll probably
56 define __RESTRICT, just as Sun C does. */
57 #if defined __SUNPRO_CC && !defined __RESTRICT
60 case $ac_cv_c_restrict in
62 no) AC_DEFINE([restrict], []) ;;
63 *) AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;;