Mercurial > hg > sonic-visualiser
comparison acinclude.m4 @ 1984:015416e3a298 import-audio-data
Merge from default branch
author | Chris Cannam |
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date | Tue, 04 Sep 2018 14:10:47 +0100 |
parents | 810a0b8f5472 |
children |
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1912:a28cab68eac6 | 1984:015416e3a298 |
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259 | 259 |
260 AC_SUBST(HAVE_CXX11) | 260 AC_SUBST(HAVE_CXX11) |
261 fi | 261 fi |
262 ]) | 262 ]) |
263 | 263 |
264 # =========================================================================== | |
265 # https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html | |
266 # =========================================================================== | |
267 # | |
268 # SYNOPSIS | |
269 # | |
270 # AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT]) | |
271 # | |
272 # DESCRIPTION | |
273 # | |
274 # Check whether the given FLAG works with the current language's compiler | |
275 # or gives an error. (Warnings, however, are ignored) | |
276 # | |
277 # ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on | |
278 # success/failure. | |
279 # | |
280 # If EXTRA-FLAGS is defined, it is added to the current language's default | |
281 # flags (e.g. CFLAGS) when the check is done. The check is thus made with | |
282 # the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to | |
283 # force the compiler to issue an error when a bad flag is given. | |
284 # | |
285 # INPUT gives an alternative input source to AC_COMPILE_IFELSE. | |
286 # | |
287 # NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this | |
288 # macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG. | |
289 # | |
290 # LICENSE | |
291 # | |
292 # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> | |
293 # Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> | |
294 # | |
295 # Copying and distribution of this file, with or without modification, are | |
296 # permitted in any medium without royalty provided the copyright notice | |
297 # and this notice are preserved. This file is offered as-is, without any | |
298 # warranty. | |
299 | |
300 AC_DEFUN([AX_CHECK_COMPILE_FLAG], | |
301 [AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF | |
302 AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl | |
303 AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [ | |
304 ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS | |
305 _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1" | |
306 AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])], | |
307 [AS_VAR_SET(CACHEVAR,[yes])], | |
308 [AS_VAR_SET(CACHEVAR,[no])]) | |
309 _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags]) | |
310 AS_VAR_IF(CACHEVAR,yes, | |
311 [m4_default([$2], :)], | |
312 [m4_default([$3], :)]) | |
313 AS_VAR_POPDEF([CACHEVAR])dnl | |
314 ])dnl AX_CHECK_COMPILE_FLAGS |