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Allow the user to avoid the GNULIB_TEST_* macros. * m4/gnulib-common.m4 (gl_ASSERT_NO_GNULIB_TESTS): New macro. Suggested by Paul Eggert.
author Bruno Haible <bruno@clisp.org>
date Thu, 20 Jan 2011 10:31:24 +0100
parents 97fc9a21a8fb
children b2abfb114786
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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14188
87bb0468d75c Allow the user to avoid the GNULIB_TEST_* macros.
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1 # gnulib-common.m4 serial 22
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2 dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
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3 dnl This file is free software; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
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7 # gl_COMMON
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8 # is expanded unconditionally through gnulib-tool magic.
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9 AC_DEFUN([gl_COMMON], [
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10 dnl Use AC_REQUIRE here, so that the code is expanded once only.
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11 AC_REQUIRE([gl_00GNULIB])
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12 AC_REQUIRE([gl_COMMON_BODY])
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13 ])
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14 AC_DEFUN([gl_COMMON_BODY], [
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15 AH_VERBATIM([isoc99_inline],
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16 [/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports
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17 the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of
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18 earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.
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19 __APPLE__ && __MACH__ test for MacOS X.
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20 __APPLE_CC__ tests for the Apple compiler and its version.
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21 __STDC_VERSION__ tests for the C99 mode. */
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22 #if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
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23 # define __GNUC_STDC_INLINE__ 1
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24 #endif])
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25 AH_VERBATIM([unused_parameter],
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26 [/* Define as a marker that can be attached to declarations that might not
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27 be used. This helps to reduce warnings, such as from
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28 GCC -Wunused-parameter. */
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29 #if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
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30 # define _GL_UNUSED __attribute__ ((__unused__))
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31 #else
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32 # define _GL_UNUSED
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33 #endif
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34 /* The name _UNUSED_PARAMETER_ is an earlier spelling, although the name
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35 is a misnomer outside of parameter lists. */
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36 #define _UNUSED_PARAMETER_ _GL_UNUSED
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37 ])
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38 dnl Preparation for running test programs:
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39 dnl Tell glibc to write diagnostics from -D_FORTIFY_SOURCE=2 to stderr, not
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40 dnl to /dev/tty, so they can be redirected to log files. Such diagnostics
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41 dnl arise e.g., in the macros gl_PRINTF_DIRECTIVE_N, gl_SNPRINTF_DIRECTIVE_N.
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42 LIBC_FATAL_STDERR_=1
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43 export LIBC_FATAL_STDERR_
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44 ])
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45
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46 # gl_MODULE_INDICATOR_CONDITION
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47 # expands to a C preprocessor expression that evaluates to 1 or 0, depending
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48 # whether a gnulib module that has been requested shall be considered present
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49 # or not.
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50 AC_DEFUN([gl_MODULE_INDICATOR_CONDITION], [1])
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51
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52 # gl_MODULE_INDICATOR_SET_VARIABLE([modulename])
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53 # sets the shell variable that indicates the presence of the given module to
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54 # a C preprocessor expression that will evaluate to 1.
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55 AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE],
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56 [
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57 GNULIB_[]m4_translit([[$1]],
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58 [abcdefghijklmnopqrstuvwxyz./-],
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59 [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=gl_MODULE_INDICATOR_CONDITION
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60 ])
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61
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62 # gl_MODULE_INDICATOR([modulename])
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63 # defines a C macro indicating the presence of the given module
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64 # in a location where it can be used.
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65 # | Value | Value |
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66 # | in lib/ | in tests/ |
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67 # --------------------------------------------+---------+-----------+
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68 # Module present among main modules: | 1 | 1 |
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69 # --------------------------------------------+---------+-----------+
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70 # Module present among tests-related modules: | 0 | 1 |
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71 # --------------------------------------------+---------+-----------+
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72 # Module not present at all: | 0 | 0 |
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73 # --------------------------------------------+---------+-----------+
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74 AC_DEFUN([gl_MODULE_INDICATOR],
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75 [
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76 AC_DEFINE_UNQUOTED([GNULIB_]m4_translit([[$1]],
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77 [abcdefghijklmnopqrstuvwxyz./-],
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78 [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]),
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79 [gl_MODULE_INDICATOR_CONDITION],
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80 [Define to a C preprocessor expression that evaluates to 1 or 0,
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81 depending whether the gnulib module $1 shall be considered present.])
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82 ])
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83
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84 # gl_MODULE_INDICATOR_FOR_TESTS([modulename])
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85 # defines a C macro indicating the presence of the given module
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86 # in lib or tests. This is useful to determine whether the module
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87 # should be tested.
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88 # | Value | Value |
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89 # | in lib/ | in tests/ |
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90 # --------------------------------------------+---------+-----------+
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91 # Module present among main modules: | 1 | 1 |
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92 # --------------------------------------------+---------+-----------+
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93 # Module present among tests-related modules: | 1 | 1 |
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94 # --------------------------------------------+---------+-----------+
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95 # Module not present at all: | 0 | 0 |
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96 # --------------------------------------------+---------+-----------+
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97 AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS],
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98 [
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99 AC_DEFINE([GNULIB_TEST_]m4_translit([[$1]],
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100 [abcdefghijklmnopqrstuvwxyz./-],
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101 [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1],
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102 [Define to 1 when the gnulib module $1 should be tested.])
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103 ])
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104
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105 # gl_ASSERT_NO_GNULIB_TESTS
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106 # asserts that there will be no gnulib tests in the scope of the configure.ac
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107 # and thereby enables an optimization of config.h.
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108 # Used by Emacs.
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109 AC_DEFUN([gl_ASSERT_NO_GNULIB_TESTS],
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110 [
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111 dnl Override gl_MODULE_INDICATOR_FOR_TESTS.
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112 AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS], [])
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113 ])
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114
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115 # Test whether <features.h> exists.
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116 # Set HAVE_FEATURES_H.
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117 AC_DEFUN([gl_FEATURES_H],
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118 [
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119 AC_CHECK_HEADERS_ONCE([features.h])
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120 if test $ac_cv_header_features_h = yes; then
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121 HAVE_FEATURES_H=1
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122 else
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123 HAVE_FEATURES_H=0
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124 fi
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125 AC_SUBST([HAVE_FEATURES_H])
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126 ])
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127
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128 # m4_foreach_w
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129 # is a backport of autoconf-2.59c's m4_foreach_w.
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130 # Remove this macro when we can assume autoconf >= 2.60.
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131 m4_ifndef([m4_foreach_w],
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132 [m4_define([m4_foreach_w],
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133 [m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])])])
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134
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135 # AS_VAR_IF(VAR, VALUE, [IF-MATCH], [IF-NOT-MATCH])
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136 # ----------------------------------------------------
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137 # Backport of autoconf-2.63b's macro.
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138 # Remove this macro when we can assume autoconf >= 2.64.
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139 m4_ifndef([AS_VAR_IF],
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140 [m4_define([AS_VAR_IF],
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141 [AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])])
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142
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143 # AC_PROG_MKDIR_P
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144 # is a backport of autoconf-2.60's AC_PROG_MKDIR_P, with a fix
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145 # for interoperability with automake-1.9.6 from autoconf-2.62.
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146 # Remove this macro when we can assume autoconf >= 2.62 or
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147 # autoconf >= 2.60 && automake >= 1.10.
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148 m4_ifdef([AC_PROG_MKDIR_P], [
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149 dnl For automake-1.9.6 && autoconf < 2.62: Ensure MKDIR_P is AC_SUBSTed.
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150 m4_define([AC_PROG_MKDIR_P],
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151 m4_defn([AC_PROG_MKDIR_P])[
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152 AC_SUBST([MKDIR_P])])], [
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153 dnl For autoconf < 2.60: Backport of AC_PROG_MKDIR_P.
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154 AC_DEFUN_ONCE([AC_PROG_MKDIR_P],
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155 [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake
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156 MKDIR_P='$(mkdir_p)'
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157 AC_SUBST([MKDIR_P])])])
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158
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159 # AC_C_RESTRICT
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160 # This definition overrides the AC_C_RESTRICT macro from autoconf 2.60..2.61,
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161 # so that mixed use of GNU C and GNU C++ and mixed use of Sun C and Sun C++
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162 # works.
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163 # This definition can be removed once autoconf >= 2.62 can be assumed.
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164 m4_if(m4_version_compare(m4_defn([m4_PACKAGE_VERSION]),[2.62]),[-1],[
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165 AC_DEFUN([AC_C_RESTRICT],
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166 [AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict],
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167 [ac_cv_c_restrict=no
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168 # The order here caters to the fact that C++ does not require restrict.
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169 for ac_kw in __restrict __restrict__ _Restrict restrict; do
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170 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
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171 [[typedef int * int_ptr;
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172 int foo (int_ptr $ac_kw ip) {
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173 return ip[0];
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174 }]],
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175 [[int s[1];
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176 int * $ac_kw t = s;
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177 t[0] = 0;
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178 return foo(t)]])],
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179 [ac_cv_c_restrict=$ac_kw])
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180 test "$ac_cv_c_restrict" != no && break
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181 done
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182 ])
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183 AH_VERBATIM([restrict],
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184 [/* Define to the equivalent of the C99 'restrict' keyword, or to
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185 nothing if this is not supported. Do not define if restrict is
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186 supported directly. */
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187 #undef restrict
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188 /* Work around a bug in Sun C++: it does not support _Restrict, even
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189 though the corresponding Sun C compiler does, which causes
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190 "#define restrict _Restrict" in the previous line. Perhaps some future
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191 version of Sun C++ will work with _Restrict; if so, it'll probably
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192 define __RESTRICT, just as Sun C does. */
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193 #if defined __SUNPRO_CC && !defined __RESTRICT
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194 # define _Restrict
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195 #endif])
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196 case $ac_cv_c_restrict in
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197 restrict) ;;
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198 no) AC_DEFINE([restrict], []) ;;
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199 *) AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;;
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200 esac
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201 ])
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202 ])
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203
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204 # gl_BIGENDIAN
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205 # is like AC_C_BIGENDIAN, except that it can be AC_REQUIREd.
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206 # Note that AC_REQUIRE([AC_C_BIGENDIAN]) does not work reliably because some
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207 # macros invoke AC_C_BIGENDIAN with arguments.
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208 AC_DEFUN([gl_BIGENDIAN],
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209 [
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210 AC_C_BIGENDIAN
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211 ])
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212
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213 # gl_CACHE_VAL_SILENT(cache-id, command-to-set-it)
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214 # is like AC_CACHE_VAL(cache-id, command-to-set-it), except that it does not
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215 # output a spurious "(cached)" mark in the midst of other configure output.
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216 # This macro should be used instead of AC_CACHE_VAL when it is not surrounded
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217 # by an AC_MSG_CHECKING/AC_MSG_RESULT pair.
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218 AC_DEFUN([gl_CACHE_VAL_SILENT],
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219 [
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220 saved_as_echo_n="$as_echo_n"
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221 as_echo_n=':'
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222 AC_CACHE_VAL([$1], [$2])
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223 as_echo_n="$saved_as_echo_n"
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224 ])