1 # gnulib-common.m4 serial 15
2 dnl Copyright (C) 2007-2010 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_00GNULIB])
12 AC_REQUIRE([gl_COMMON_BODY])
14 AC_DEFUN([gl_COMMON_BODY], [
15 AH_VERBATIM([isoc99_inline],
16 [/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports
17 the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of
18 earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.
19 __APPLE__ && __MACH__ test for MacOS X.
20 __APPLE_CC__ tests for the Apple compiler and its version.
21 __STDC_VERSION__ tests for the C99 mode. */
22 #if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
23 # define __GNUC_STDC_INLINE__ 1
25 AH_VERBATIM([unused_parameter],
26 [/* Define as a marker that can be attached to declarations that might not
27 be used. This helps to reduce warnings, such as from
28 GCC -Wunused-parameter. */
29 #if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
30 # define _GL_UNUSED __attribute__ ((__unused__))
34 /* The name _UNUSED_PARAMETER_ is an earlier spelling, although the name
35 is a misnomer outside of parameter lists. */
36 #define _UNUSED_PARAMETER_ _GL_UNUSED
40 # gl_MODULE_INDICATOR_CONDITION
41 # expands to a C preprocessor expression that evaluates to 1 or 0, depending
42 # whether a gnulib module that has been requested shall be considered present
44 AC_DEFUN([gl_MODULE_INDICATOR_CONDITION], [1])
46 # gl_MODULE_INDICATOR_SET_VARIABLE([modulename])
47 # sets the shell variable that indicates the presence of the given module to
48 # a C preprocessor expression that will evaluate to 1.
49 AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE],
51 GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=gl_MODULE_INDICATOR_CONDITION
54 # gl_MODULE_INDICATOR([modulename])
55 # defines a C macro indicating the presence of the given module.
56 AC_DEFUN([gl_MODULE_INDICATOR],
58 AC_DEFINE([GNULIB_]translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1],
59 [Define to 1 when using the gnulib module ]$1[.])
63 # is a backport of autoconf-2.59c's m4_foreach_w.
64 # Remove this macro when we can assume autoconf >= 2.60.
65 m4_ifndef([m4_foreach_w],
66 [m4_define([m4_foreach_w],
67 [m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])])])
69 # AS_VAR_IF(VAR, VALUE, [IF-MATCH], [IF-NOT-MATCH])
70 # ----------------------------------------------------
71 # Backport of autoconf-2.63b's macro.
72 # Remove this macro when we can assume autoconf >= 2.64.
73 m4_ifndef([AS_VAR_IF],
74 [m4_define([AS_VAR_IF],
75 [AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])])
78 # is a backport of autoconf-2.60's AC_PROG_MKDIR_P, with a fix
79 # for interoperability with automake-1.9.6 from autoconf-2.62.
80 # Remove this macro when we can assume autoconf >= 2.62 or
81 # autoconf >= 2.60 && automake >= 1.10.
82 m4_ifdef([AC_PROG_MKDIR_P], [
83 dnl For automake-1.9.6 && autoconf < 2.62: Ensure MKDIR_P is AC_SUBSTed.
84 m4_define([AC_PROG_MKDIR_P],
85 m4_defn([AC_PROG_MKDIR_P])[
86 AC_SUBST([MKDIR_P])])], [
87 dnl For autoconf < 2.60: Backport of AC_PROG_MKDIR_P.
88 AC_DEFUN_ONCE([AC_PROG_MKDIR_P],
89 [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake
91 AC_SUBST([MKDIR_P])])])
94 # This definition overrides the AC_C_RESTRICT macro from autoconf 2.60..2.61,
95 # so that mixed use of GNU C and GNU C++ and mixed use of Sun C and Sun C++
97 # This definition can be removed once autoconf >= 2.62 can be assumed.
98 AC_DEFUN([AC_C_RESTRICT],
99 [AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict],
101 # The order here caters to the fact that C++ does not require restrict.
102 for ac_kw in __restrict __restrict__ _Restrict restrict; do
103 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
104 [[typedef int * int_ptr;
105 int foo (int_ptr $ac_kw ip) {
112 [ac_cv_c_restrict=$ac_kw])
113 test "$ac_cv_c_restrict" != no && break
116 AH_VERBATIM([restrict],
117 [/* Define to the equivalent of the C99 'restrict' keyword, or to
118 nothing if this is not supported. Do not define if restrict is
119 supported directly. */
121 /* Work around a bug in Sun C++: it does not support _Restrict, even
122 though the corresponding Sun C compiler does, which causes
123 "#define restrict _Restrict" in the previous line. Perhaps some future
124 version of Sun C++ will work with _Restrict; if so, it'll probably
125 define __RESTRICT, just as Sun C does. */
126 #if defined __SUNPRO_CC && !defined __RESTRICT
129 case $ac_cv_c_restrict in
131 no) AC_DEFINE([restrict], []) ;;
132 *) AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;;
137 # is like AC_C_BIGENDIAN, except that it can be AC_REQUIREd.
138 # Note that AC_REQUIRE([AC_C_BIGENDIAN]) does not work reliably because some
139 # macros invoke AC_C_BIGENDIAN with arguments.
140 AC_DEFUN([gl_BIGENDIAN],
145 # gl_CACHE_VAL_SILENT(cache-id, command-to-set-it)
146 # is like AC_CACHE_VAL(cache-id, command-to-set-it), except that it does not
147 # output a spurious "(cached)" mark in the midst of other configure output.
148 # This macro should be used instead of AC_CACHE_VAL when it is not surrounded
149 # by an AC_MSG_CHECKING/AC_MSG_RESULT pair.
150 AC_DEFUN([gl_CACHE_VAL_SILENT],
152 saved_as_echo_n="$as_echo_n"
154 AC_CACHE_VAL([$1], [$2])
155 as_echo_n="$saved_as_echo_n"