1 # gnulib-common.m4 serial 4
2 dnl Copyright (C) 2007-2008 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.
8 # is expanded unconditionally through gnulib-tool magic.
9 AC_DEFUN([gl_COMMON], [
10 dnl Use AC_REQUIRE here, so that the code is expanded once only.
11 AC_REQUIRE([gl_COMMON_BODY])
13 AC_DEFUN([gl_COMMON_BODY], [
14 AH_VERBATIM([isoc99_inline],
15 [/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports
16 the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of
17 earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.
18 __APPLE__ && __MACH__ test for MacOS X.
19 __APPLE_CC__ tests for the Apple compiler and its version.
20 __STDC_VERSION__ tests for the C99 mode. */
21 #if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
22 # define __GNUC_STDC_INLINE__ 1
26 # gl_MODULE_INDICATOR([modulename])
27 # defines a C macro indicating the presence of the given module.
28 AC_DEFUN([gl_MODULE_INDICATOR],
30 AC_DEFINE([GNULIB_]translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1],
31 [Define to 1 when using the gnulib module ]$1[.])
35 # is a backport of autoconf-2.60's AC_PROG_MKDIR_P.
36 # Remove this macro when we can assume autoconf >= 2.60.
37 m4_ifdef([AC_PROG_MKDIR_P], [], [
38 AC_DEFUN([AC_PROG_MKDIR_P],
39 [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake
41 AC_SUBST([MKDIR_P])])])
44 # This definition overrides the AC_C_RESTRICT macro from autoconf 2.60..2.61,
45 # so that mixed use of GNU C and GNU C++ and mixed use of Sun C and Sun C++
47 # This definition can be removed once autoconf >= 2.62 can be assumed.
48 AC_DEFUN([AC_C_RESTRICT],
49 [AC_CACHE_CHECK([for C/C++ restrict keyword], ac_cv_c_restrict,
51 # The order here caters to the fact that C++ does not require restrict.
52 for ac_kw in __restrict __restrict__ _Restrict restrict; do
53 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
54 [[typedef int * int_ptr;
55 int foo (int_ptr $ac_kw ip) {
62 [ac_cv_c_restrict=$ac_kw])
63 test "$ac_cv_c_restrict" != no && break
66 AH_VERBATIM([restrict],
67 [/* Define to the equivalent of the C99 'restrict' keyword, or to
68 nothing if this is not supported. Do not define if restrict is
69 supported directly. */
71 /* Work around a bug in Sun C++: it does not support _Restrict, even
72 though the corresponding Sun C compiler does, which causes
73 "#define restrict _Restrict" in the previous line. Perhaps some future
74 version of Sun C++ will work with _Restrict; if so, it'll probably
75 define __RESTRICT, just as Sun C does. */
76 #if defined __SUNPRO_CC && !defined __RESTRICT
79 case $ac_cv_c_restrict in
81 no) AC_DEFINE([restrict], []) ;;
82 *) AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;;