Commit | Line | Data |
---|---|---|
7a6dbc2f SDJ |
1 | # gnulib-common.m4 serial 39 |
2 | dnl Copyright (C) 2007-2018 Free Software Foundation, Inc. | |
f6ea5628 DJ |
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. | |
6 | ||
f434ba03 PA |
7 | # gl_COMMON |
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]) | |
13 | ]) | |
14 | AC_DEFUN([gl_COMMON_BODY], [ | |
770d76d7 PA |
15 | AH_VERBATIM([_Noreturn], |
16 | [/* The _Noreturn keyword of C11. */ | |
40a73391 JK |
17 | #if ! (defined _Noreturn \ |
18 | || (defined __STDC_VERSION__ && 201112 <= __STDC_VERSION__)) | |
770d76d7 PA |
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 | ]) | |
f434ba03 PA |
29 | AH_VERBATIM([isoc99_inline], |
30 | [/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports | |
31 | the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of | |
32 | earlier versions), but does not display it by setting __GNUC_STDC_INLINE__. | |
40a73391 | 33 | __APPLE__ && __MACH__ test for Mac OS X. |
f434ba03 PA |
34 | __APPLE_CC__ tests for the Apple compiler and its version. |
35 | __STDC_VERSION__ tests for the C99 mode. */ | |
36 | #if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__ | |
37 | # define __GNUC_STDC_INLINE__ 1 | |
38 | #endif]) | |
39 | AH_VERBATIM([unused_parameter], | |
40 | [/* Define as a marker that can be attached to declarations that might not | |
41 | be used. This helps to reduce warnings, such as from | |
42 | GCC -Wunused-parameter. */ | |
43 | #if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7) | |
44 | # define _GL_UNUSED __attribute__ ((__unused__)) | |
45 | #else | |
46 | # define _GL_UNUSED | |
47 | #endif | |
48 | /* The name _UNUSED_PARAMETER_ is an earlier spelling, although the name | |
49 | is a misnomer outside of parameter lists. */ | |
50 | #define _UNUSED_PARAMETER_ _GL_UNUSED | |
770d76d7 | 51 | |
4a626d0a PA |
52 | /* gcc supports the "unused" attribute on possibly unused labels, and |
53 | g++ has since version 4.5. Note to support C++ as well as C, | |
54 | _GL_UNUSED_LABEL should be used with a trailing ; */ | |
55 | #if !defined __cplusplus || __GNUC__ > 4 \ | |
56 | || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) | |
57 | # define _GL_UNUSED_LABEL _GL_UNUSED | |
58 | #else | |
59 | # define _GL_UNUSED_LABEL | |
60 | #endif | |
61 | ||
770d76d7 PA |
62 | /* The __pure__ attribute was added in gcc 2.96. */ |
63 | #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) | |
64 | # define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__)) | |
65 | #else | |
66 | # define _GL_ATTRIBUTE_PURE /* empty */ | |
67 | #endif | |
68 | ||
69 | /* The __const__ attribute was added in gcc 2.95. */ | |
70 | #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95) | |
71 | # define _GL_ATTRIBUTE_CONST __attribute__ ((__const__)) | |
72 | #else | |
73 | # define _GL_ATTRIBUTE_CONST /* empty */ | |
74 | #endif | |
7a6dbc2f SDJ |
75 | |
76 | /* The __malloc__ attribute was added in gcc 3. */ | |
77 | #if 3 <= __GNUC__ | |
78 | # define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__)) | |
79 | #else | |
80 | # define _GL_ATTRIBUTE_MALLOC /* empty */ | |
81 | #endif | |
f434ba03 PA |
82 | ]) |
83 | dnl Preparation for running test programs: | |
84 | dnl Tell glibc to write diagnostics from -D_FORTIFY_SOURCE=2 to stderr, not | |
85 | dnl to /dev/tty, so they can be redirected to log files. Such diagnostics | |
86 | dnl arise e.g., in the macros gl_PRINTF_DIRECTIVE_N, gl_SNPRINTF_DIRECTIVE_N. | |
87 | LIBC_FATAL_STDERR_=1 | |
88 | export LIBC_FATAL_STDERR_ | |
89 | ]) | |
90 | ||
91 | # gl_MODULE_INDICATOR_CONDITION | |
92 | # expands to a C preprocessor expression that evaluates to 1 or 0, depending | |
93 | # whether a gnulib module that has been requested shall be considered present | |
94 | # or not. | |
770d76d7 | 95 | m4_define([gl_MODULE_INDICATOR_CONDITION], [1]) |
f434ba03 PA |
96 | |
97 | # gl_MODULE_INDICATOR_SET_VARIABLE([modulename]) | |
98 | # sets the shell variable that indicates the presence of the given module to | |
99 | # a C preprocessor expression that will evaluate to 1. | |
100 | AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE], | |
101 | [ | |
770d76d7 PA |
102 | gl_MODULE_INDICATOR_SET_VARIABLE_AUX( |
103 | [GNULIB_[]m4_translit([[$1]], | |
104 | [abcdefghijklmnopqrstuvwxyz./-], | |
105 | [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])], | |
106 | [gl_MODULE_INDICATOR_CONDITION]) | |
107 | ]) | |
108 | ||
109 | # gl_MODULE_INDICATOR_SET_VARIABLE_AUX([variable]) | |
110 | # modifies the shell variable to include the gl_MODULE_INDICATOR_CONDITION. | |
111 | # The shell variable's value is a C preprocessor expression that evaluates | |
112 | # to 0 or 1. | |
113 | AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE_AUX], | |
114 | [ | |
115 | m4_if(m4_defn([gl_MODULE_INDICATOR_CONDITION]), [1], | |
116 | [ | |
117 | dnl Simplify the expression VALUE || 1 to 1. | |
118 | $1=1 | |
119 | ], | |
120 | [gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR([$1], | |
121 | [gl_MODULE_INDICATOR_CONDITION])]) | |
122 | ]) | |
123 | ||
124 | # gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR([variable], [condition]) | |
125 | # modifies the shell variable to include the given condition. The shell | |
126 | # variable's value is a C preprocessor expression that evaluates to 0 or 1. | |
127 | AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR], | |
128 | [ | |
129 | dnl Simplify the expression 1 || CONDITION to 1. | |
130 | if test "$[]$1" != 1; then | |
131 | dnl Simplify the expression 0 || CONDITION to CONDITION. | |
132 | if test "$[]$1" = 0; then | |
133 | $1=$2 | |
134 | else | |
135 | $1="($[]$1 || $2)" | |
136 | fi | |
137 | fi | |
f434ba03 PA |
138 | ]) |
139 | ||
f6ea5628 | 140 | # gl_MODULE_INDICATOR([modulename]) |
f434ba03 PA |
141 | # defines a C macro indicating the presence of the given module |
142 | # in a location where it can be used. | |
143 | # | Value | Value | | |
144 | # | in lib/ | in tests/ | | |
145 | # --------------------------------------------+---------+-----------+ | |
146 | # Module present among main modules: | 1 | 1 | | |
147 | # --------------------------------------------+---------+-----------+ | |
148 | # Module present among tests-related modules: | 0 | 1 | | |
149 | # --------------------------------------------+---------+-----------+ | |
150 | # Module not present at all: | 0 | 0 | | |
151 | # --------------------------------------------+---------+-----------+ | |
f6ea5628 DJ |
152 | AC_DEFUN([gl_MODULE_INDICATOR], |
153 | [ | |
f434ba03 PA |
154 | AC_DEFINE_UNQUOTED([GNULIB_]m4_translit([[$1]], |
155 | [abcdefghijklmnopqrstuvwxyz./-], | |
156 | [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), | |
157 | [gl_MODULE_INDICATOR_CONDITION], | |
158 | [Define to a C preprocessor expression that evaluates to 1 or 0, | |
159 | depending whether the gnulib module $1 shall be considered present.]) | |
f6ea5628 DJ |
160 | ]) |
161 | ||
f434ba03 PA |
162 | # gl_MODULE_INDICATOR_FOR_TESTS([modulename]) |
163 | # defines a C macro indicating the presence of the given module | |
164 | # in lib or tests. This is useful to determine whether the module | |
165 | # should be tested. | |
166 | # | Value | Value | | |
167 | # | in lib/ | in tests/ | | |
168 | # --------------------------------------------+---------+-----------+ | |
169 | # Module present among main modules: | 1 | 1 | | |
170 | # --------------------------------------------+---------+-----------+ | |
171 | # Module present among tests-related modules: | 1 | 1 | | |
172 | # --------------------------------------------+---------+-----------+ | |
173 | # Module not present at all: | 0 | 0 | | |
174 | # --------------------------------------------+---------+-----------+ | |
175 | AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS], | |
176 | [ | |
177 | AC_DEFINE([GNULIB_TEST_]m4_translit([[$1]], | |
178 | [abcdefghijklmnopqrstuvwxyz./-], | |
179 | [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1], | |
180 | [Define to 1 when the gnulib module $1 should be tested.]) | |
181 | ]) | |
182 | ||
770d76d7 PA |
183 | # gl_ASSERT_NO_GNULIB_POSIXCHECK |
184 | # asserts that there will never be a need to #define GNULIB_POSIXCHECK. | |
185 | # and thereby enables an optimization of configure and config.h. | |
186 | # Used by Emacs. | |
187 | AC_DEFUN([gl_ASSERT_NO_GNULIB_POSIXCHECK], | |
188 | [ | |
189 | dnl Override gl_WARN_ON_USE_PREPARE. | |
190 | dnl But hide this definition from 'aclocal'. | |
191 | AC_DEFUN([gl_W][ARN_ON_USE_PREPARE], []) | |
192 | ]) | |
193 | ||
194 | # gl_ASSERT_NO_GNULIB_TESTS | |
195 | # asserts that there will be no gnulib tests in the scope of the configure.ac | |
196 | # and thereby enables an optimization of config.h. | |
197 | # Used by Emacs. | |
198 | AC_DEFUN([gl_ASSERT_NO_GNULIB_TESTS], | |
199 | [ | |
200 | dnl Override gl_MODULE_INDICATOR_FOR_TESTS. | |
201 | AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS], []) | |
202 | ]) | |
203 | ||
204 | # Test whether <features.h> exists. | |
205 | # Set HAVE_FEATURES_H. | |
206 | AC_DEFUN([gl_FEATURES_H], | |
207 | [ | |
208 | AC_CHECK_HEADERS_ONCE([features.h]) | |
209 | if test $ac_cv_header_features_h = yes; then | |
210 | HAVE_FEATURES_H=1 | |
211 | else | |
212 | HAVE_FEATURES_H=0 | |
213 | fi | |
214 | AC_SUBST([HAVE_FEATURES_H]) | |
215 | ]) | |
216 | ||
f434ba03 PA |
217 | # m4_foreach_w |
218 | # is a backport of autoconf-2.59c's m4_foreach_w. | |
f6ea5628 | 219 | # Remove this macro when we can assume autoconf >= 2.60. |
f434ba03 PA |
220 | m4_ifndef([m4_foreach_w], |
221 | [m4_define([m4_foreach_w], | |
222 | [m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])])]) | |
223 | ||
224 | # AS_VAR_IF(VAR, VALUE, [IF-MATCH], [IF-NOT-MATCH]) | |
225 | # ---------------------------------------------------- | |
226 | # Backport of autoconf-2.63b's macro. | |
227 | # Remove this macro when we can assume autoconf >= 2.64. | |
228 | m4_ifndef([AS_VAR_IF], | |
229 | [m4_define([AS_VAR_IF], | |
230 | [AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])]) | |
231 | ||
770d76d7 PA |
232 | # gl_PROG_CC_C99 |
233 | # Modifies the value of the shell variable CC in an attempt to make $CC | |
234 | # understand ISO C99 source code. | |
235 | # This is like AC_PROG_CC_C99, except that | |
236 | # - AC_PROG_CC_C99 did not exist in Autoconf versions < 2.60, | |
237 | # - AC_PROG_CC_C99 does not mix well with AC_PROG_CC_STDC | |
7a6dbc2f | 238 | # <https://lists.gnu.org/r/bug-gnulib/2011-09/msg00367.html>, |
770d76d7 | 239 | # but many more packages use AC_PROG_CC_STDC than AC_PROG_CC_C99 |
7a6dbc2f | 240 | # <https://lists.gnu.org/r/bug-gnulib/2011-09/msg00441.html>. |
770d76d7 PA |
241 | # Remaining problems: |
242 | # - When AC_PROG_CC_STDC is invoked twice, it adds the C99 enabling options | |
243 | # to CC twice | |
7a6dbc2f | 244 | # <https://lists.gnu.org/r/bug-gnulib/2011-09/msg00431.html>. |
770d76d7 PA |
245 | # - AC_PROG_CC_STDC is likely to change now that C11 is an ISO standard. |
246 | AC_DEFUN([gl_PROG_CC_C99], | |
247 | [ | |
248 | dnl Change that version number to the minimum Autoconf version that supports | |
249 | dnl mixing AC_PROG_CC_C99 calls with AC_PROG_CC_STDC calls. | |
250 | m4_version_prereq([9.0], | |
251 | [AC_REQUIRE([AC_PROG_CC_C99])], | |
252 | [AC_REQUIRE([AC_PROG_CC_STDC])]) | |
253 | ]) | |
254 | ||
255 | # gl_PROG_AR_RANLIB | |
256 | # Determines the values for AR, ARFLAGS, RANLIB that fit with the compiler. | |
257 | # The user can set the variables AR, ARFLAGS, RANLIB if he wants to override | |
258 | # the values. | |
259 | AC_DEFUN([gl_PROG_AR_RANLIB], | |
260 | [ | |
261 | dnl Minix 3 comes with two toolchains: The Amsterdam Compiler Kit compiler | |
262 | dnl as "cc", and GCC as "gcc". They have different object file formats and | |
49e4877c | 263 | dnl library formats. In particular, the GNU binutils programs ar and ranlib |
770d76d7 PA |
264 | dnl produce libraries that work only with gcc, not with cc. |
265 | AC_REQUIRE([AC_PROG_CC]) | |
7a6dbc2f SDJ |
266 | dnl The '][' hides this use from 'aclocal'. |
267 | AC_BEFORE([$0], [A][M_PROG_AR]) | |
770d76d7 PA |
268 | AC_CACHE_CHECK([for Minix Amsterdam compiler], [gl_cv_c_amsterdam_compiler], |
269 | [ | |
270 | AC_EGREP_CPP([Amsterdam], | |
271 | [ | |
272 | #ifdef __ACK__ | |
273 | Amsterdam | |
274 | #endif | |
275 | ], | |
276 | [gl_cv_c_amsterdam_compiler=yes], | |
277 | [gl_cv_c_amsterdam_compiler=no]) | |
278 | ]) | |
49e4877c PA |
279 | |
280 | dnl Don't compete with AM_PROG_AR's decision about AR/ARFLAGS if we are not | |
281 | dnl building with __ACK__. | |
282 | if test $gl_cv_c_amsterdam_compiler = yes; then | |
283 | if test -z "$AR"; then | |
770d76d7 | 284 | AR='cc -c.a' |
770d76d7 | 285 | fi |
770d76d7 | 286 | if test -z "$ARFLAGS"; then |
49e4877c | 287 | ARFLAGS='-o' |
770d76d7 | 288 | fi |
49e4877c PA |
289 | else |
290 | dnl AM_PROG_AR was added in automake v1.11.2. AM_PROG_AR does not AC_SUBST | |
291 | dnl ARFLAGS variable (it is filed into Makefile.in directly by automake | |
292 | dnl script on-demand, if not specified by ./configure of course). | |
293 | dnl Don't AC_REQUIRE the AM_PROG_AR otherwise the code for __ACK__ above | |
294 | dnl will be ignored. Also, pay attention to call AM_PROG_AR in else block | |
295 | dnl because AM_PROG_AR is written so it could re-set AR variable even for | |
296 | dnl __ACK__. It may seem like its easier to avoid calling the macro here, | |
297 | dnl but we need to AC_SUBST both AR/ARFLAGS (thus those must have some good | |
298 | dnl default value and automake should usually know them). | |
7a6dbc2f SDJ |
299 | dnl |
300 | dnl The '][' hides this use from 'aclocal'. | |
301 | m4_ifdef([A][M_PROG_AR], [A][M_PROG_AR], [:]) | |
49e4877c PA |
302 | fi |
303 | ||
304 | dnl In case the code above has not helped with setting AR/ARFLAGS, use | |
305 | dnl Automake-documented default values for AR and ARFLAGS, but prefer | |
306 | dnl ${host}-ar over ar (useful for cross-compiling). | |
307 | AC_CHECK_TOOL([AR], [ar], [ar]) | |
308 | if test -z "$ARFLAGS"; then | |
309 | ARFLAGS='cr' | |
770d76d7 | 310 | fi |
49e4877c | 311 | |
770d76d7 PA |
312 | AC_SUBST([AR]) |
313 | AC_SUBST([ARFLAGS]) | |
314 | if test -z "$RANLIB"; then | |
315 | if test $gl_cv_c_amsterdam_compiler = yes; then | |
316 | RANLIB=':' | |
317 | else | |
318 | dnl Use the ranlib program if it is available. | |
319 | AC_PROG_RANLIB | |
320 | fi | |
321 | fi | |
322 | AC_SUBST([RANLIB]) | |
323 | ]) | |
324 | ||
f434ba03 PA |
325 | # AC_PROG_MKDIR_P |
326 | # is a backport of autoconf-2.60's AC_PROG_MKDIR_P, with a fix | |
327 | # for interoperability with automake-1.9.6 from autoconf-2.62. | |
328 | # Remove this macro when we can assume autoconf >= 2.62 or | |
329 | # autoconf >= 2.60 && automake >= 1.10. | |
4a626d0a PA |
330 | # AC_AUTOCONF_VERSION was introduced in 2.62, so use that as the witness. |
331 | m4_ifndef([AC_AUTOCONF_VERSION],[ | |
f434ba03 PA |
332 | m4_ifdef([AC_PROG_MKDIR_P], [ |
333 | dnl For automake-1.9.6 && autoconf < 2.62: Ensure MKDIR_P is AC_SUBSTed. | |
334 | m4_define([AC_PROG_MKDIR_P], | |
335 | m4_defn([AC_PROG_MKDIR_P])[ | |
336 | AC_SUBST([MKDIR_P])])], [ | |
337 | dnl For autoconf < 2.60: Backport of AC_PROG_MKDIR_P. | |
338 | AC_DEFUN_ONCE([AC_PROG_MKDIR_P], | |
f6ea5628 DJ |
339 | [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake |
340 | MKDIR_P='$(mkdir_p)' | |
341 | AC_SUBST([MKDIR_P])])]) | |
4a626d0a | 342 | ]) |
f6ea5628 DJ |
343 | |
344 | # AC_C_RESTRICT | |
4a626d0a PA |
345 | # This definition is copied from post-2.69 Autoconf and overrides the |
346 | # AC_C_RESTRICT macro from autoconf 2.60..2.69. It can be removed | |
347 | # once autoconf >= 2.70 can be assumed. It's painful to check version | |
348 | # numbers, and in practice this macro is more up-to-date than Autoconf | |
349 | # is, so override Autoconf unconditionally. | |
f6ea5628 | 350 | AC_DEFUN([AC_C_RESTRICT], |
f434ba03 | 351 | [AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict], |
f6ea5628 DJ |
352 | [ac_cv_c_restrict=no |
353 | # The order here caters to the fact that C++ does not require restrict. | |
354 | for ac_kw in __restrict __restrict__ _Restrict restrict; do | |
4a626d0a PA |
355 | AC_COMPILE_IFELSE( |
356 | [AC_LANG_PROGRAM( | |
7a6dbc2f SDJ |
357 | [[typedef int *int_ptr; |
358 | int foo (int_ptr $ac_kw ip) { return ip[0]; } | |
359 | int bar (int [$ac_kw]); /* Catch GCC bug 14050. */ | |
360 | int bar (int ip[$ac_kw]) { return ip[0]; } | |
361 | ]], | |
362 | [[int s[1]; | |
363 | int *$ac_kw t = s; | |
364 | t[0] = 0; | |
365 | return foo (t) + bar (t); | |
366 | ]])], | |
f6ea5628 DJ |
367 | [ac_cv_c_restrict=$ac_kw]) |
368 | test "$ac_cv_c_restrict" != no && break | |
369 | done | |
370 | ]) | |
371 | AH_VERBATIM([restrict], | |
372 | [/* Define to the equivalent of the C99 'restrict' keyword, or to | |
373 | nothing if this is not supported. Do not define if restrict is | |
374 | supported directly. */ | |
375 | #undef restrict | |
4a626d0a PA |
376 | /* Work around a bug in Sun C++: it does not support _Restrict or |
377 | __restrict__, even though the corresponding Sun C compiler ends up with | |
378 | "#define restrict _Restrict" or "#define restrict __restrict__" in the | |
379 | previous line. Perhaps some future version of Sun C++ will work with | |
380 | restrict; if so, hopefully it defines __RESTRICT like Sun C does. */ | |
f6ea5628 DJ |
381 | #if defined __SUNPRO_CC && !defined __RESTRICT |
382 | # define _Restrict | |
4a626d0a | 383 | # define __restrict__ |
f6ea5628 DJ |
384 | #endif]) |
385 | case $ac_cv_c_restrict in | |
386 | restrict) ;; | |
387 | no) AC_DEFINE([restrict], []) ;; | |
388 | *) AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;; | |
389 | esac | |
4a626d0a | 390 | ])# AC_C_RESTRICT |
f434ba03 PA |
391 | |
392 | # gl_BIGENDIAN | |
393 | # is like AC_C_BIGENDIAN, except that it can be AC_REQUIREd. | |
394 | # Note that AC_REQUIRE([AC_C_BIGENDIAN]) does not work reliably because some | |
395 | # macros invoke AC_C_BIGENDIAN with arguments. | |
396 | AC_DEFUN([gl_BIGENDIAN], | |
397 | [ | |
398 | AC_C_BIGENDIAN | |
399 | ]) | |
400 | ||
401 | # gl_CACHE_VAL_SILENT(cache-id, command-to-set-it) | |
402 | # is like AC_CACHE_VAL(cache-id, command-to-set-it), except that it does not | |
403 | # output a spurious "(cached)" mark in the midst of other configure output. | |
404 | # This macro should be used instead of AC_CACHE_VAL when it is not surrounded | |
405 | # by an AC_MSG_CHECKING/AC_MSG_RESULT pair. | |
406 | AC_DEFUN([gl_CACHE_VAL_SILENT], | |
407 | [ | |
408 | saved_as_echo_n="$as_echo_n" | |
409 | as_echo_n=':' | |
410 | AC_CACHE_VAL([$1], [$2]) | |
411 | as_echo_n="$saved_as_echo_n" | |
412 | ]) | |
4a626d0a PA |
413 | |
414 | # AS_VAR_COPY was added in autoconf 2.63b | |
415 | m4_define_default([AS_VAR_COPY], | |
416 | [AS_LITERAL_IF([$1[]$2], [$1=$$2], [eval $1=\$$2])]) | |
417 | ||
418 | # AC_PROG_SED was added in autoconf 2.59b | |
419 | m4_ifndef([AC_PROG_SED], | |
420 | [AC_DEFUN([AC_PROG_SED], | |
421 | [AC_CACHE_CHECK([for a sed that does not truncate output], ac_cv_path_SED, | |
422 | [dnl ac_script should not contain more than 99 commands (for HP-UX sed), | |
423 | dnl but more than about 7000 bytes, to catch a limit in Solaris 8 /usr/ucb/sed. | |
424 | ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/ | |
425 | for ac_i in 1 2 3 4 5 6 7; do | |
426 | ac_script="$ac_script$as_nl$ac_script" | |
427 | done | |
428 | echo "$ac_script" 2>/dev/null | sed 99q >conftest.sed | |
429 | AS_UNSET([ac_script]) | |
430 | if test -z "$SED"; then | |
431 | ac_path_SED_found=false | |
432 | _AS_PATH_WALK([], [ | |
433 | for ac_prog in sed gsed; do | |
434 | for ac_exec_ext in '' $ac_executable_extensions; do | |
435 | ac_path_SED="$as_dir/$ac_prog$ac_exec_ext" | |
436 | AS_EXECUTABLE_P(["$ac_path_SED"]) || continue | |
437 | case `"$ac_path_SED" --version 2>&1` in | |
438 | *GNU*) ac_cv_path_SED=$ac_path_SED ac_path_SED_found=:;; | |
439 | *) | |
440 | ac_count=0 | |
441 | _AS_ECHO_N([0123456789]) >conftest.in | |
442 | while : | |
443 | do | |
444 | cat conftest.in conftest.in >conftest.tmp | |
445 | mv conftest.tmp conftest.in | |
446 | cp conftest.in conftest.nl | |
447 | echo >> conftest.nl | |
448 | "$ac_path_SED" -f conftest.sed <conftest.nl >conftest.out 2>/dev/null || break | |
449 | diff conftest.out conftest.nl >/dev/null 2>&1 || break | |
450 | ac_count=`expr $ac_count + 1` | |
451 | if test $ac_count -gt ${ac_path_SED_max-0}; then | |
452 | # Best so far, but keep looking for better | |
453 | ac_cv_path_SED=$ac_path_SED | |
454 | ac_path_SED_max=$ac_count | |
455 | fi | |
456 | test $ac_count -gt 10 && break | |
457 | done | |
458 | rm -f conftest.in conftest.tmp conftest.nl conftest.out;; | |
459 | esac | |
460 | $ac_path_SED_found && break 3 | |
461 | done | |
462 | done]) | |
463 | if test -z "$ac_cv_path_SED"; then | |
464 | AC_ERROR([no acceptable sed could be found in \$PATH]) | |
465 | fi | |
466 | else | |
467 | ac_cv_path_SED=$SED | |
468 | fi | |
7a6dbc2f | 469 | ]) |
4a626d0a PA |
470 | SED="$ac_cv_path_SED" |
471 | AC_SUBST([SED])dnl | |
472 | rm -f conftest.sed | |
7a6dbc2f SDJ |
473 | ]) |
474 | ]) |