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-rw-r--r--gl/m4/gnulib-common.m4192
1 files changed, 184 insertions, 8 deletions
diff --git a/gl/m4/gnulib-common.m4 b/gl/m4/gnulib-common.m4
index 4c7ac30d..0ae5a9ec 100644
--- a/gl/m4/gnulib-common.m4
+++ b/gl/m4/gnulib-common.m4
@@ -1,5 +1,5 @@
1# gnulib-common.m4 serial 20 1# gnulib-common.m4 serial 33
2dnl Copyright (C) 2007-2010 Free Software Foundation, Inc. 2dnl Copyright (C) 2007-2013 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation 3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it, 4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved. 5dnl with or without modifications, as long as this notice is preserved.
@@ -12,11 +12,25 @@ AC_DEFUN([gl_COMMON], [
12 AC_REQUIRE([gl_COMMON_BODY]) 12 AC_REQUIRE([gl_COMMON_BODY])
13]) 13])
14AC_DEFUN([gl_COMMON_BODY], [ 14AC_DEFUN([gl_COMMON_BODY], [
15 AH_VERBATIM([_Noreturn],
16[/* The _Noreturn keyword of C11. */
17#if ! (defined _Noreturn \
18 || (defined __STDC_VERSION__ && 201112 <= __STDC_VERSION__))
19# if (3 <= __GNUC__ || (__GNUC__ == 2 && 8 <= __GNUC_MINOR__) \
20 || 0x5110 <= __SUNPRO_C)
21# define _Noreturn __attribute__ ((__noreturn__))
22# elif defined _MSC_VER && 1200 <= _MSC_VER
23# define _Noreturn __declspec (noreturn)
24# else
25# define _Noreturn
26# endif
27#endif
28])
15 AH_VERBATIM([isoc99_inline], 29 AH_VERBATIM([isoc99_inline],
16[/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports 30[/* 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 31 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__. 32 earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.
19 __APPLE__ && __MACH__ test for MacOS X. 33 __APPLE__ && __MACH__ test for Mac OS X.
20 __APPLE_CC__ tests for the Apple compiler and its version. 34 __APPLE_CC__ tests for the Apple compiler and its version.
21 __STDC_VERSION__ tests for the C99 mode. */ 35 __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__ 36#if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
@@ -34,6 +48,20 @@ AC_DEFUN([gl_COMMON_BODY], [
34/* The name _UNUSED_PARAMETER_ is an earlier spelling, although the name 48/* The name _UNUSED_PARAMETER_ is an earlier spelling, although the name
35 is a misnomer outside of parameter lists. */ 49 is a misnomer outside of parameter lists. */
36#define _UNUSED_PARAMETER_ _GL_UNUSED 50#define _UNUSED_PARAMETER_ _GL_UNUSED
51
52/* The __pure__ attribute was added in gcc 2.96. */
53#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
54# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
55#else
56# define _GL_ATTRIBUTE_PURE /* empty */
57#endif
58
59/* The __const__ attribute was added in gcc 2.95. */
60#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
61# define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
62#else
63# define _GL_ATTRIBUTE_CONST /* empty */
64#endif
37]) 65])
38 dnl Preparation for running test programs: 66 dnl Preparation for running test programs:
39 dnl Tell glibc to write diagnostics from -D_FORTIFY_SOURCE=2 to stderr, not 67 dnl Tell glibc to write diagnostics from -D_FORTIFY_SOURCE=2 to stderr, not
@@ -47,16 +75,49 @@ AC_DEFUN([gl_COMMON_BODY], [
47# expands to a C preprocessor expression that evaluates to 1 or 0, depending 75# 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 76# whether a gnulib module that has been requested shall be considered present
49# or not. 77# or not.
50AC_DEFUN([gl_MODULE_INDICATOR_CONDITION], [1]) 78m4_define([gl_MODULE_INDICATOR_CONDITION], [1])
51 79
52# gl_MODULE_INDICATOR_SET_VARIABLE([modulename]) 80# gl_MODULE_INDICATOR_SET_VARIABLE([modulename])
53# sets the shell variable that indicates the presence of the given module to 81# sets the shell variable that indicates the presence of the given module to
54# a C preprocessor expression that will evaluate to 1. 82# a C preprocessor expression that will evaluate to 1.
55AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE], 83AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE],
56[ 84[
57 GNULIB_[]m4_translit([[$1]], 85 gl_MODULE_INDICATOR_SET_VARIABLE_AUX(
58 [abcdefghijklmnopqrstuvwxyz./-], 86 [GNULIB_[]m4_translit([[$1]],
59 [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=gl_MODULE_INDICATOR_CONDITION 87 [abcdefghijklmnopqrstuvwxyz./-],
88 [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])],
89 [gl_MODULE_INDICATOR_CONDITION])
90])
91
92# gl_MODULE_INDICATOR_SET_VARIABLE_AUX([variable])
93# modifies the shell variable to include the gl_MODULE_INDICATOR_CONDITION.
94# The shell variable's value is a C preprocessor expression that evaluates
95# to 0 or 1.
96AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE_AUX],
97[
98 m4_if(m4_defn([gl_MODULE_INDICATOR_CONDITION]), [1],
99 [
100 dnl Simplify the expression VALUE || 1 to 1.
101 $1=1
102 ],
103 [gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR([$1],
104 [gl_MODULE_INDICATOR_CONDITION])])
105])
106
107# gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR([variable], [condition])
108# modifies the shell variable to include the given condition. The shell
109# variable's value is a C preprocessor expression that evaluates to 0 or 1.
110AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR],
111[
112 dnl Simplify the expression 1 || CONDITION to 1.
113 if test "$[]$1" != 1; then
114 dnl Simplify the expression 0 || CONDITION to CONDITION.
115 if test "$[]$1" = 0; then
116 $1=$2
117 else
118 $1="($[]$1 || $2)"
119 fi
120 fi
60]) 121])
61 122
62# gl_MODULE_INDICATOR([modulename]) 123# gl_MODULE_INDICATOR([modulename])
@@ -102,6 +163,40 @@ AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS],
102 [Define to 1 when the gnulib module $1 should be tested.]) 163 [Define to 1 when the gnulib module $1 should be tested.])
103]) 164])
104 165
166# gl_ASSERT_NO_GNULIB_POSIXCHECK
167# asserts that there will never be a need to #define GNULIB_POSIXCHECK.
168# and thereby enables an optimization of configure and config.h.
169# Used by Emacs.
170AC_DEFUN([gl_ASSERT_NO_GNULIB_POSIXCHECK],
171[
172 dnl Override gl_WARN_ON_USE_PREPARE.
173 dnl But hide this definition from 'aclocal'.
174 AC_DEFUN([gl_W][ARN_ON_USE_PREPARE], [])
175])
176
177# gl_ASSERT_NO_GNULIB_TESTS
178# asserts that there will be no gnulib tests in the scope of the configure.ac
179# and thereby enables an optimization of config.h.
180# Used by Emacs.
181AC_DEFUN([gl_ASSERT_NO_GNULIB_TESTS],
182[
183 dnl Override gl_MODULE_INDICATOR_FOR_TESTS.
184 AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS], [])
185])
186
187# Test whether <features.h> exists.
188# Set HAVE_FEATURES_H.
189AC_DEFUN([gl_FEATURES_H],
190[
191 AC_CHECK_HEADERS_ONCE([features.h])
192 if test $ac_cv_header_features_h = yes; then
193 HAVE_FEATURES_H=1
194 else
195 HAVE_FEATURES_H=0
196 fi
197 AC_SUBST([HAVE_FEATURES_H])
198])
199
105# m4_foreach_w 200# m4_foreach_w
106# is a backport of autoconf-2.59c's m4_foreach_w. 201# is a backport of autoconf-2.59c's m4_foreach_w.
107# Remove this macro when we can assume autoconf >= 2.60. 202# Remove this macro when we can assume autoconf >= 2.60.
@@ -117,11 +212,90 @@ m4_ifndef([AS_VAR_IF],
117[m4_define([AS_VAR_IF], 212[m4_define([AS_VAR_IF],
118[AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])]) 213[AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])])
119 214
215# gl_PROG_CC_C99
216# Modifies the value of the shell variable CC in an attempt to make $CC
217# understand ISO C99 source code.
218# This is like AC_PROG_CC_C99, except that
219# - AC_PROG_CC_C99 did not exist in Autoconf versions < 2.60,
220# - AC_PROG_CC_C99 does not mix well with AC_PROG_CC_STDC
221# <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00367.html>,
222# but many more packages use AC_PROG_CC_STDC than AC_PROG_CC_C99
223# <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00441.html>.
224# Remaining problems:
225# - When AC_PROG_CC_STDC is invoked twice, it adds the C99 enabling options
226# to CC twice
227# <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00431.html>.
228# - AC_PROG_CC_STDC is likely to change now that C11 is an ISO standard.
229AC_DEFUN([gl_PROG_CC_C99],
230[
231 dnl Change that version number to the minimum Autoconf version that supports
232 dnl mixing AC_PROG_CC_C99 calls with AC_PROG_CC_STDC calls.
233 m4_version_prereq([9.0],
234 [AC_REQUIRE([AC_PROG_CC_C99])],
235 [AC_REQUIRE([AC_PROG_CC_STDC])])
236])
237
238# gl_PROG_AR_RANLIB
239# Determines the values for AR, ARFLAGS, RANLIB that fit with the compiler.
240# The user can set the variables AR, ARFLAGS, RANLIB if he wants to override
241# the values.
242AC_DEFUN([gl_PROG_AR_RANLIB],
243[
244 dnl Minix 3 comes with two toolchains: The Amsterdam Compiler Kit compiler
245 dnl as "cc", and GCC as "gcc". They have different object file formats and
246 dnl library formats. In particular, the GNU binutils programs ar, ranlib
247 dnl produce libraries that work only with gcc, not with cc.
248 AC_REQUIRE([AC_PROG_CC])
249 AC_CACHE_CHECK([for Minix Amsterdam compiler], [gl_cv_c_amsterdam_compiler],
250 [
251 AC_EGREP_CPP([Amsterdam],
252 [
253#ifdef __ACK__
254Amsterdam
255#endif
256 ],
257 [gl_cv_c_amsterdam_compiler=yes],
258 [gl_cv_c_amsterdam_compiler=no])
259 ])
260 if test -z "$AR"; then
261 if test $gl_cv_c_amsterdam_compiler = yes; then
262 AR='cc -c.a'
263 if test -z "$ARFLAGS"; then
264 ARFLAGS='-o'
265 fi
266 else
267 dnl Use the Automake-documented default values for AR and ARFLAGS,
268 dnl but prefer ${host}-ar over ar (useful for cross-compiling).
269 AC_CHECK_TOOL([AR], [ar], [ar])
270 if test -z "$ARFLAGS"; then
271 ARFLAGS='cru'
272 fi
273 fi
274 else
275 if test -z "$ARFLAGS"; then
276 ARFLAGS='cru'
277 fi
278 fi
279 AC_SUBST([AR])
280 AC_SUBST([ARFLAGS])
281 if test -z "$RANLIB"; then
282 if test $gl_cv_c_amsterdam_compiler = yes; then
283 RANLIB=':'
284 else
285 dnl Use the ranlib program if it is available.
286 AC_PROG_RANLIB
287 fi
288 fi
289 AC_SUBST([RANLIB])
290])
291
120# AC_PROG_MKDIR_P 292# AC_PROG_MKDIR_P
121# is a backport of autoconf-2.60's AC_PROG_MKDIR_P, with a fix 293# is a backport of autoconf-2.60's AC_PROG_MKDIR_P, with a fix
122# for interoperability with automake-1.9.6 from autoconf-2.62. 294# for interoperability with automake-1.9.6 from autoconf-2.62.
123# Remove this macro when we can assume autoconf >= 2.62 or 295# Remove this macro when we can assume autoconf >= 2.62 or
124# autoconf >= 2.60 && automake >= 1.10. 296# autoconf >= 2.60 && automake >= 1.10.
297# AC_AUTOCONF_VERSION was introduced in 2.62, so use that as the witness.
298m4_ifndef([AC_AUTOCONF_VERSION],[
125m4_ifdef([AC_PROG_MKDIR_P], [ 299m4_ifdef([AC_PROG_MKDIR_P], [
126 dnl For automake-1.9.6 && autoconf < 2.62: Ensure MKDIR_P is AC_SUBSTed. 300 dnl For automake-1.9.6 && autoconf < 2.62: Ensure MKDIR_P is AC_SUBSTed.
127 m4_define([AC_PROG_MKDIR_P], 301 m4_define([AC_PROG_MKDIR_P],
@@ -132,13 +306,15 @@ m4_ifdef([AC_PROG_MKDIR_P], [
132 [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake 306 [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake
133 MKDIR_P='$(mkdir_p)' 307 MKDIR_P='$(mkdir_p)'
134 AC_SUBST([MKDIR_P])])]) 308 AC_SUBST([MKDIR_P])])])
309])
135 310
136# AC_C_RESTRICT 311# AC_C_RESTRICT
137# This definition overrides the AC_C_RESTRICT macro from autoconf 2.60..2.61, 312# 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++ 313# so that mixed use of GNU C and GNU C++ and mixed use of Sun C and Sun C++
139# works. 314# works.
140# This definition can be removed once autoconf >= 2.62 can be assumed. 315# 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],[ 316# AC_AUTOCONF_VERSION was introduced in 2.62, so use that as the witness.
317m4_ifndef([AC_AUTOCONF_VERSION],[
142AC_DEFUN([AC_C_RESTRICT], 318AC_DEFUN([AC_C_RESTRICT],
143[AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict], 319[AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict],
144 [ac_cv_c_restrict=no 320 [ac_cv_c_restrict=no