1# gnulib-common.m4 serial 20 2dnl Copyright (C) 2007-2010 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7# gl_COMMON 8# is expanded unconditionally through gnulib-tool magic. 9AC_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]) 13]) 14AC_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 24#endif]) 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__)) 31#else 32# define _GL_UNUSED 33#endif 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 37]) 38 dnl Preparation for running test programs: 39 dnl Tell glibc to write diagnostics from -D_FORTIFY_SOURCE=2 to stderr, not 40 dnl to /dev/tty, so they can be redirected to log files. Such diagnostics 41 dnl arise e.g., in the macros gl_PRINTF_DIRECTIVE_N, gl_SNPRINTF_DIRECTIVE_N. 42 LIBC_FATAL_STDERR_=1 43 export LIBC_FATAL_STDERR_ 44]) 45 46# gl_MODULE_INDICATOR_CONDITION 47# expands to a C preprocessor expression that evaluates to 1 or 0, depending 48# whether a gnulib module that has been requested shall be considered present 49# or not. 50AC_DEFUN([gl_MODULE_INDICATOR_CONDITION], [1]) 51 52# gl_MODULE_INDICATOR_SET_VARIABLE([modulename]) 53# sets the shell variable that indicates the presence of the given module to 54# a C preprocessor expression that will evaluate to 1. 55AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE], 56[ 57 GNULIB_[]m4_translit([[$1]], 58 [abcdefghijklmnopqrstuvwxyz./-], 59 [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=gl_MODULE_INDICATOR_CONDITION 60]) 61 62# gl_MODULE_INDICATOR([modulename]) 63# defines a C macro indicating the presence of the given module 64# in a location where it can be used. 65# | Value | Value | 66# | in lib/ | in tests/ | 67# --------------------------------------------+---------+-----------+ 68# Module present among main modules: | 1 | 1 | 69# --------------------------------------------+---------+-----------+ 70# Module present among tests-related modules: | 0 | 1 | 71# --------------------------------------------+---------+-----------+ 72# Module not present at all: | 0 | 0 | 73# --------------------------------------------+---------+-----------+ 74AC_DEFUN([gl_MODULE_INDICATOR], 75[ 76 AC_DEFINE_UNQUOTED([GNULIB_]m4_translit([[$1]], 77 [abcdefghijklmnopqrstuvwxyz./-], 78 [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), 79 [gl_MODULE_INDICATOR_CONDITION], 80 [Define to a C preprocessor expression that evaluates to 1 or 0, 81 depending whether the gnulib module $1 shall be considered present.]) 82]) 83 84# gl_MODULE_INDICATOR_FOR_TESTS([modulename]) 85# defines a C macro indicating the presence of the given module 86# in lib or tests. This is useful to determine whether the module 87# should be tested. 88# | Value | Value | 89# | in lib/ | in tests/ | 90# --------------------------------------------+---------+-----------+ 91# Module present among main modules: | 1 | 1 | 92# --------------------------------------------+---------+-----------+ 93# Module present among tests-related modules: | 1 | 1 | 94# --------------------------------------------+---------+-----------+ 95# Module not present at all: | 0 | 0 | 96# --------------------------------------------+---------+-----------+ 97AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS], 98[ 99 AC_DEFINE([GNULIB_TEST_]m4_translit([[$1]], 100 [abcdefghijklmnopqrstuvwxyz./-], 101 [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1], 102 [Define to 1 when the gnulib module $1 should be tested.]) 103]) 104 105# m4_foreach_w 106# is a backport of autoconf-2.59c's m4_foreach_w. 107# Remove this macro when we can assume autoconf >= 2.60. 108m4_ifndef([m4_foreach_w], 109 [m4_define([m4_foreach_w], 110 [m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])])]) 111 112# AS_VAR_IF(VAR, VALUE, [IF-MATCH], [IF-NOT-MATCH]) 113# ---------------------------------------------------- 114# Backport of autoconf-2.63b's macro. 115# Remove this macro when we can assume autoconf >= 2.64. 116m4_ifndef([AS_VAR_IF], 117[m4_define([AS_VAR_IF], 118[AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])]) 119 120# AC_PROG_MKDIR_P 121# is a backport of autoconf-2.60's AC_PROG_MKDIR_P, with a fix 122# for interoperability with automake-1.9.6 from autoconf-2.62. 123# Remove this macro when we can assume autoconf >= 2.62 or 124# autoconf >= 2.60 && automake >= 1.10. 125m4_ifdef([AC_PROG_MKDIR_P], [ 126 dnl For automake-1.9.6 && autoconf < 2.62: Ensure MKDIR_P is AC_SUBSTed. 127 m4_define([AC_PROG_MKDIR_P], 128 m4_defn([AC_PROG_MKDIR_P])[ 129 AC_SUBST([MKDIR_P])])], [ 130 dnl For autoconf < 2.60: Backport of AC_PROG_MKDIR_P. 131 AC_DEFUN_ONCE([AC_PROG_MKDIR_P], 132 [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake 133 MKDIR_P='$(mkdir_p)' 134 AC_SUBST([MKDIR_P])])]) 135 136# AC_C_RESTRICT 137# This definition overrides the AC_C_RESTRICT macro from autoconf 2.60..2.61, 138# so that mixed use of GNU C and GNU C++ and mixed use of Sun C and Sun C++ 139# works. 140# This definition can be removed once autoconf >= 2.62 can be assumed. 141m4_if(m4_version_compare(m4_defn([m4_PACKAGE_VERSION]),[2.62]),[-1],[ 142AC_DEFUN([AC_C_RESTRICT], 143[AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict], 144 [ac_cv_c_restrict=no 145 # The order here caters to the fact that C++ does not require restrict. 146 for ac_kw in __restrict __restrict__ _Restrict restrict; do 147 AC_COMPILE_IFELSE([AC_LANG_PROGRAM( 148 [[typedef int * int_ptr; 149 int foo (int_ptr $ac_kw ip) { 150 return ip[0]; 151 }]], 152 [[int s[1]; 153 int * $ac_kw t = s; 154 t[0] = 0; 155 return foo(t)]])], 156 [ac_cv_c_restrict=$ac_kw]) 157 test "$ac_cv_c_restrict" != no && break 158 done 159 ]) 160 AH_VERBATIM([restrict], 161[/* Define to the equivalent of the C99 'restrict' keyword, or to 162 nothing if this is not supported. Do not define if restrict is 163 supported directly. */ 164#undef restrict 165/* Work around a bug in Sun C++: it does not support _Restrict, even 166 though the corresponding Sun C compiler does, which causes 167 "#define restrict _Restrict" in the previous line. Perhaps some future 168 version of Sun C++ will work with _Restrict; if so, it'll probably 169 define __RESTRICT, just as Sun C does. */ 170#if defined __SUNPRO_CC && !defined __RESTRICT 171# define _Restrict 172#endif]) 173 case $ac_cv_c_restrict in 174 restrict) ;; 175 no) AC_DEFINE([restrict], []) ;; 176 *) AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;; 177 esac 178]) 179]) 180 181# gl_BIGENDIAN 182# is like AC_C_BIGENDIAN, except that it can be AC_REQUIREd. 183# Note that AC_REQUIRE([AC_C_BIGENDIAN]) does not work reliably because some 184# macros invoke AC_C_BIGENDIAN with arguments. 185AC_DEFUN([gl_BIGENDIAN], 186[ 187 AC_C_BIGENDIAN 188]) 189 190# gl_CACHE_VAL_SILENT(cache-id, command-to-set-it) 191# is like AC_CACHE_VAL(cache-id, command-to-set-it), except that it does not 192# output a spurious "(cached)" mark in the midst of other configure output. 193# This macro should be used instead of AC_CACHE_VAL when it is not surrounded 194# by an AC_MSG_CHECKING/AC_MSG_RESULT pair. 195AC_DEFUN([gl_CACHE_VAL_SILENT], 196[ 197 saved_as_echo_n="$as_echo_n" 198 as_echo_n=':' 199 AC_CACHE_VAL([$1], [$2]) 200 as_echo_n="$saved_as_echo_n" 201]) 202