svn merge ^/trunk/blender -r40644:40720
[blender-staging.git] / build_files / cmake / macros.cmake
1 # -*- mode: cmake; indent-tabs-mode: t; -*-
2 # $Id$
3
4
5 # foo_bar.spam --> foo_barMySuffix.spam
6 macro(file_suffix
7         file_name_new file_name file_suffix
8         )
9
10         get_filename_component(_file_name_PATH ${file_name} PATH)
11         get_filename_component(_file_name_NAME_WE ${file_name} NAME_WE)
12         get_filename_component(_file_name_EXT ${file_name} EXT)
13         set(${file_name_new} "${_file_name_PATH}/${_file_name_NAME_WE}${file_suffix}${_file_name_EXT}")
14
15         unset(_file_name_PATH)
16         unset(_file_name_NAME_WE)
17         unset(_file_name_EXT)
18 endmacro()
19
20 # usefil for adding debug suffix to library lists:
21 # /somepath/foo.lib --> /somepath/foo_d.lib
22 macro(file_list_suffix
23         fp_list_new fp_list fn_suffix
24         )
25
26         # incase of empty list
27         set(_fp)
28         set(_fp_suffixed)
29
30         set(fp_list_new)
31
32         foreach(_fp ${fp_list})
33                 file_suffix(_fp_suffixed "${_fp}" "${fn_suffix}")
34                 list(APPEND "${fp_list_new}" "${_fp_suffixed}")
35         endforeach()
36
37         unset(_fp)
38         unset(_fp_suffixed)
39
40 endmacro()
41
42
43 macro(target_link_libraries_optimized TARGET LIBS)
44         foreach(_LIB ${LIBS})
45                 target_link_libraries(${TARGET} optimized "${_LIB}")
46         endforeach()
47         unset(_LIB)
48 endmacro()
49
50 macro(target_link_libraries_debug TARGET LIBS)
51         foreach(_LIB ${LIBS})
52                 target_link_libraries(${TARGET} debug "${_LIB}")
53         endforeach()
54         unset(_LIB)
55 endmacro()
56
57 # Nicer makefiles with -I/1/foo/ instead of -I/1/2/3/../../foo/
58 # use it instead of include_directories()
59 macro(blender_include_dirs
60         includes)
61         set(_ALL_INCS "")
62         foreach(_INC ${ARGV})
63                 get_filename_component(_ABS_INC ${_INC} ABSOLUTE)
64                 list(APPEND _ALL_INCS ${_ABS_INC})
65                 # for checking for invalid includes, disable for regular use
66                 ##if(NOT EXISTS "${_ABS_INC}/")
67                 ##      message(FATAL_ERROR "Include not found: ${_ABS_INC}/")
68                 ##endif()
69         endforeach()
70         include_directories(${_ALL_INCS})
71         unset(_INC)
72         unset(_ABS_INC)
73         unset(_ALL_INCS)
74 endmacro()
75
76 macro(blender_include_dirs_sys
77         includes)
78         set(_ALL_INCS "")
79         foreach(_INC ${ARGV})
80                 get_filename_component(_ABS_INC ${_INC} ABSOLUTE)
81                 list(APPEND _ALL_INCS ${_ABS_INC})
82                 ##if(NOT EXISTS "${_ABS_INC}/")
83                 ##      message(FATAL_ERROR "Include not found: ${_ABS_INC}/")
84                 ##endif()
85         endforeach()
86         include_directories(SYSTEM ${_ALL_INCS})
87         unset(_INC)
88         unset(_ABS_INC)
89         unset(_ALL_INCS)
90 endmacro()
91
92 macro(blender_source_group
93         sources)
94
95         # Group by location on disk
96         source_group("Source Files" FILES CMakeLists.txt)
97
98         foreach(_SRC ${sources})
99                 get_filename_component(_SRC_EXT ${_SRC} EXT)
100                 if((${_SRC_EXT} MATCHES ".h") OR (${_SRC_EXT} MATCHES ".hpp"))
101                         source_group("Header Files" FILES ${_SRC})
102                 else()
103                         source_group("Source Files" FILES ${_SRC})
104                 endif()
105         endforeach()
106
107         unset(_SRC)
108         unset(_SRC_EXT)
109 endmacro()
110
111
112 # only MSVC uses SOURCE_GROUP
113 macro(blender_add_lib_nolist
114         name
115         sources
116         includes
117         includes_sys)
118
119         # message(STATUS "Configuring library ${name}")
120
121         # include_directories(${includes})
122         # include_directories(SYSTEM ${includes_sys})
123         blender_include_dirs("${includes}")
124         blender_include_dirs_sys("${includes_sys}")
125
126         add_library(${name} ${sources})
127
128         # works fine without having the includes
129         # listed is helpful for IDE's (QtCreator/MSVC)
130         blender_source_group("${sources}")
131
132 endmacro()
133
134
135 macro(blender_add_lib
136         name
137         sources
138         includes
139         includes_sys)
140
141         blender_add_lib_nolist(${name} "${sources}" "${includes}" "${includes_sys}")
142
143         set_property(GLOBAL APPEND PROPERTY BLENDER_LINK_LIBS ${name})
144 endmacro()
145
146
147 macro(SETUP_LIBDIRS)
148         link_directories(${JPEG_LIBPATH} ${PNG_LIBPATH} ${ZLIB_LIBPATH} ${FREETYPE_LIBPATH})
149
150         if(WITH_PYTHON)  #  AND NOT WITH_PYTHON_MODULE  # WIN32 needs
151                 link_directories(${PYTHON_LIBPATH})
152         endif()
153         if(WITH_INTERNATIONAL)
154                 link_directories(${ICONV_LIBPATH})
155                 link_directories(${GETTEXT_LIBPATH})
156         endif()
157         if(WITH_SDL)
158                 link_directories(${SDL_LIBPATH})
159         endif()
160         if(WITH_CODEC_FFMPEG)
161                 link_directories(${FFMPEG_LIBPATH})
162         endif()
163         if(WITH_IMAGE_OPENEXR)
164                 link_directories(${OPENEXR_LIBPATH})
165         endif()
166         if(WITH_IMAGE_TIFF)
167                 link_directories(${TIFF_LIBPATH})
168         endif()
169         if(WITH_IMAGE_OPENJPEG AND UNIX AND NOT APPLE)
170                 link_directories(${OPENJPEG_LIBPATH})
171         endif()
172         if(WITH_CODEC_QUICKTIME)
173                 link_directories(${QUICKTIME_LIBPATH})
174         endif()
175         if(WITH_OPENAL)
176                 link_directories(${OPENAL_LIBPATH})
177         endif()
178         if(WITH_JACK)
179                 link_directories(${JACK_LIBPATH})
180         endif()
181         if(WITH_CODEC_SNDFILE)
182                 link_directories(${SNDFILE_LIBPATH})
183         endif()
184         if(WITH_SAMPLERATE)
185                 link_directories(${SAMPLERATE_LIBPATH})
186         endif()
187         if(WITH_FFTW3)
188                 link_directories(${FFTW3_LIBPATH})
189         endif()
190         if(WITH_OPENCOLLADA)
191                 link_directories(${OPENCOLLADA_LIBPATH})
192                 link_directories(${PCRE_LIBPATH})
193                 link_directories(${EXPAT_LIBPATH})
194         endif()
195         if(WITH_MEM_JEMALLOC)
196                 link_directories(${JEMALLOC_LIBPATH})
197         endif()
198
199         if(WIN32 AND NOT UNIX)
200                 link_directories(${PTHREADS_LIBPATH})
201         endif()
202 endmacro()
203
204 macro(setup_liblinks
205         target)
206
207         set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${PLATFORM_LINKFLAGS}")
208         set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} ${PLATFORM_LINKFLAGS_DEBUG}")
209
210         target_link_libraries(${target}
211                         ${OPENGL_gl_LIBRARY}
212                         ${OPENGL_glu_LIBRARY}
213                         ${JPEG_LIBRARIES}
214                         ${PNG_LIBRARIES}
215                         ${ZLIB_LIBRARIES}
216                         ${FREETYPE_LIBRARY}
217                         ${PLATFORM_LINKLIBS})
218
219         # since we are using the local libs for python when compiling msvc projects, we need to add _d when compiling debug versions
220         if(WITH_PYTHON)  # AND NOT WITH_PYTHON_MODULE  # WIN32 needs
221                 target_link_libraries(${target} ${PYTHON_LINKFLAGS})
222
223                 if(WIN32 AND NOT UNIX)
224                         file_list_suffix(PYTHON_LIBRARIES_DEBUG "${PYTHON_LIBRARIES}" "_d")
225                         target_link_libraries_debug(${target} "${PYTHON_LIBRARIES_DEBUG}")
226                         target_link_libraries_optimized(${target} "${PYTHON_LIBRARIES}")
227                         unset(PYTHON_LIBRARIES_DEBUG)
228                 else()
229                         target_link_libraries(${target} ${PYTHON_LIBRARIES})
230                 endif()
231         endif()
232
233         if(NOT WITH_BUILTIN_GLEW)
234                 target_link_libraries(${target} ${GLEW_LIBRARY})
235         endif()
236
237         if(WITH_INTERNATIONAL)
238                 target_link_libraries(${target} ${GETTEXT_LIB})
239
240                 if(WIN32 AND NOT UNIX)
241                         target_link_libraries(${target} ${ICONV_LIBRARIES})
242                 endif()
243         endif()
244
245         if(WITH_OPENAL)
246                 target_link_libraries(${target} ${OPENAL_LIBRARY})
247         endif()
248         if(WITH_FFTW3)
249                 target_link_libraries(${target} ${FFTW3_LIBRARIES})
250         endif()
251         if(WITH_JACK)
252                 target_link_libraries(${target} ${JACK_LIBRARIES})
253         endif()
254         if(WITH_CODEC_SNDFILE)
255                 target_link_libraries(${target} ${SNDFILE_LIBRARIES})
256         endif()
257         if(WITH_SAMPLERATE)
258                 target_link_libraries(${target} ${SAMPLERATE_LIBRARIES})
259         endif()
260         if(WITH_SDL)
261                 target_link_libraries(${target} ${SDL_LIBRARY})
262         endif()
263         if(WITH_CODEC_QUICKTIME)
264                 target_link_libraries(${target} ${QUICKTIME_LIBRARIES})
265         endif()
266         if(WITH_IMAGE_TIFF)
267                 target_link_libraries(${target} ${TIFF_LIBRARY})
268         endif()
269         if(WITH_IMAGE_OPENEXR)
270                 if(WIN32 AND NOT UNIX)
271                         file_list_suffix(OPENEXR_LIBRARIES_DEBUG "${OPENEXR_LIBRARIES}" "_d")
272                         target_link_libraries_debug(${target} "${OPENEXR_LIBRARIES_DEBUG}")
273                         target_link_libraries_optimized(${target} "${OPENEXR_LIBRARIES}")
274                         unset(OPENEXR_LIBRARIES_DEBUG)
275                 else()
276                         target_link_libraries(${target} ${OPENEXR_LIBRARIES})
277                 endif()
278         endif()
279         if(WITH_IMAGE_OPENJPEG AND UNIX AND NOT APPLE)
280                 target_link_libraries(${target} ${OPENJPEG_LIBRARIES})
281         endif()
282         if(WITH_CODEC_FFMPEG)
283                 target_link_libraries(${target} ${FFMPEG_LIBRARIES})
284         endif()
285         if(WITH_OPENCOLLADA)
286                 if(WIN32 AND NOT UNIX)
287                         file_list_suffix(OPENCOLLADA_LIBRARIES_DEBUG "${OPENCOLLADA_LIBRARIES}" "_d")
288                         target_link_libraries_debug(${target} "${OPENCOLLADA_LIBRARIES_DEBUG}")
289                         target_link_libraries_optimized(${target} "${OPENCOLLADA_LIBRARIES}")
290                         unset(OPENCOLLADA_LIBRARIES_DEBUG)
291
292                         file_list_suffix(PCRE_LIBRARIES_DEBUG "${PCRE_LIBRARIES}" "_d")
293                         target_link_libraries_debug(${target} "${PCRE_LIBRARIES_DEBUG}")
294                         target_link_libraries_optimized(${target} "${PCRE_LIBRARIES}")
295                         unset(PCRE_LIBRARIES_DEBUG)
296
297                         if(EXPAT_LIB)
298                                 file_list_suffix(EXPAT_LIB_DEBUG "${EXPAT_LIB}" "_d")
299                                 target_link_libraries_debug(${target} "${EXPAT_LIB_DEBUG}")
300                                 target_link_libraries_optimized(${target} "${EXPAT_LIB}")
301                                 unset(EXPAT_LIB_DEBUG)
302                         endif()
303                 else()
304                         target_link_libraries(${target}
305                                         ${OPENCOLLADA_LIBRARIES}
306                                         ${PCRE_LIBRARIES}
307                                         ${XML2_LIBRARIES}
308                                         ${EXPAT_LIB})
309                 endif()
310         endif()
311         if(WITH_MEM_JEMALLOC)
312                 target_link_libraries(${target} ${JEMALLOC_LIBRARIES})
313         endif()
314         if(WITH_INPUT_NDOF)
315                 target_link_libraries(${target} ${NDOF_LIBRARIES})
316         endif()
317
318         if(WIN32 AND NOT UNIX)
319                 target_link_libraries(${target} ${PTHREADS_LIBRARIES})
320         endif()
321 endmacro()
322
323 macro(TEST_SSE_SUPPORT)
324         include(CheckCSourceRuns)
325
326         # message(STATUS "Detecting SSE support")
327         if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
328                 set(CMAKE_REQUIRED_FLAGS "-msse -msse2")
329         elseif(MSVC)
330                 set(CMAKE_REQUIRED_FLAGS "/arch:SSE2") # TODO, SSE 1 ?
331         endif()
332
333         if(NOT DEFINED ${SUPPORT_SSE_BUILD})
334                 check_c_source_runs("
335                         #include <xmmintrin.h>
336                         int main() { __m128 v = _mm_setzero_ps(); return 0; }"
337                 SUPPORT_SSE_BUILD)
338                 
339                 if(SUPPORT_SSE_BUILD)
340                         message(STATUS "SSE Support: detected.")
341                 else()
342                         message(STATUS "SSE Support: missing.")
343                 endif()
344                 set(${SUPPORT_SSE_BUILD} ${SUPPORT_SSE_BUILD} CACHE INTERNAL "SSE Test")
345         endif() 
346
347         if(NOT DEFINED ${SUPPORT_SSE2_BUILD})
348                 check_c_source_runs("
349                         #include <emmintrin.h>
350                         int main() { __m128d v = _mm_setzero_pd(); return 0; }"
351                 SUPPORT_SSE2_BUILD)
352
353                 if(SUPPORT_SSE2_BUILD)
354                         message(STATUS "SSE2 Support: detected.")
355                 else()
356                         message(STATUS "SSE2 Support: missing.")
357                 endif() 
358                 set(${SUPPORT_SSE2_BUILD} ${SUPPORT_SSE2_BUILD} CACHE INTERNAL "SSE2 Test")
359         endif()
360
361 endmacro()
362
363 # when we have warnings as errors applied globally this
364 # needs to be removed for some external libs which we dont maintain.
365
366 # utility macro
367 macro(remove_flag
368         flag)
369
370         string(REGEX REPLACE ${flag} "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
371         string(REGEX REPLACE ${flag} "" CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG}")
372         string(REGEX REPLACE ${flag} "" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
373         string(REGEX REPLACE ${flag} "" CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL}")
374         string(REGEX REPLACE ${flag} "" CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO}")
375
376         string(REGEX REPLACE ${flag} "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
377         string(REGEX REPLACE ${flag} "" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
378         string(REGEX REPLACE ${flag} "" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
379         string(REGEX REPLACE ${flag} "" CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL}")
380         string(REGEX REPLACE ${flag} "" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
381
382 endmacro()
383
384 macro(remove_strict_flags)
385
386         if(CMAKE_COMPILER_IS_GNUCC)
387                 remove_flag("-Wstrict-prototypes")
388                 remove_flag("-Wunused-parameter")
389                 remove_flag("-Wwrite-strings")
390                 remove_flag("-Wundef")
391                 remove_flag("-Wshadow")
392                 remove_flag("-Werror=[^ ]+")
393                 remove_flag("-Werror")
394         endif()
395
396         if(MSVC)
397                 # TODO
398         endif()
399
400 endmacro()
401
402 macro(ADD_CHECK_C_COMPILER_FLAG
403         _CFLAGS
404         _CACHE_VAR
405         _FLAG)
406
407         include(CheckCCompilerFlag)
408
409         CHECK_C_COMPILER_FLAG("${_FLAG}" "${_CACHE_VAR}")
410         if(${_CACHE_VAR})
411                 # message(STATUS "Using CFLAG: ${_FLAG}")
412                 set(${_CFLAGS} "${${_CFLAGS}} ${_FLAG}")
413         else()
414                 message(STATUS "Unsupported CFLAG: ${_FLAG}")
415         endif()
416 endmacro()
417
418 macro(ADD_CHECK_CXX_COMPILER_FLAG
419         _CXXFLAGS
420         _CACHE_VAR
421         _FLAG)
422
423         include(CheckCXXCompilerFlag)
424
425         CHECK_CXX_COMPILER_FLAG("${_FLAG}" "${_CACHE_VAR}")
426         if(${_CACHE_VAR})
427                 # message(STATUS "Using CXXFLAG: ${_FLAG}")
428                 set(${_CXXFLAGS} "${${_CXXFLAGS}} ${_FLAG}")
429         else()
430                 message(STATUS "Unsupported CXXFLAG: ${_FLAG}")
431         endif()
432 endmacro()
433
434 macro(get_blender_version)
435         # So cmake depends on BKE_blender.h, beware of inf-loops!
436         CONFIGURE_FILE(${CMAKE_SOURCE_DIR}/source/blender/blenkernel/BKE_blender.h ${CMAKE_BINARY_DIR}/source/blender/blenkernel/BKE_blender.h.done)
437
438         file(STRINGS ${CMAKE_SOURCE_DIR}/source/blender/blenkernel/BKE_blender.h _contents REGEX "^#define[ \t]+BLENDER_.*$")
439
440         string(REGEX REPLACE ".*#define[ \t]+BLENDER_VERSION[ \t]+([0-9]+).*" "\\1" _out_version "${_contents}")
441         string(REGEX REPLACE ".*#define[ \t]+BLENDER_SUBVERSION[ \t]+([0-9]+).*" "\\1" _out_subversion "${_contents}")
442         string(REGEX REPLACE ".*#define[ \t]+BLENDER_VERSION_CHAR[ \t]+([a-z]+).*" "\\1" _out_version_char "${_contents}")
443         string(REGEX REPLACE ".*#define[ \t]+BLENDER_VERSION_CYCLE[ \t]+([a-z]+).*" "\\1" _out_version_cycle "${_contents}")
444
445         if(NOT ${_out_version} MATCHES "[0-9]+")
446                 message(FATAL_ERROR "Version parsing failed for BLENDER_VERSION")
447         endif()
448
449         if(NOT ${_out_subversion} MATCHES "[0-9]+")
450                 message(FATAL_ERROR "Version parsing failed for BLENDER_SUBVERSION")
451         endif()
452
453         # clumsy regex, only single char are ok but it could be unset
454
455         string(LENGTH "${_out_version_char}" _out_version_char_len)
456         if(NOT _out_version_char_len EQUAL 1)
457                 set(_out_version_char "")
458         elseif(NOT ${_out_version_char} MATCHES "[a-z]+")
459                 message(FATAL_ERROR "Version parsing failed for BLENDER_VERSION_CHAR")
460         endif()
461
462         if(NOT ${_out_version_cycle} MATCHES "[a-z]+")
463                 message(FATAL_ERROR "Version parsing failed for BLENDER_VERSION_CYCLE")
464         endif()
465
466         math(EXPR BLENDER_VERSION_MAJOR "${_out_version} / 100")
467         math(EXPR BLENDER_VERSION_MINOR "${_out_version} % 100")
468         set(BLENDER_VERSION "${BLENDER_VERSION_MAJOR}.${BLENDER_VERSION_MINOR}")
469
470         set(BLENDER_SUBVERSION ${_out_subversion})
471         set(BLENDER_VERSION_CHAR ${_out_version_char})
472         set(BLENDER_VERSION_CYCLE ${_out_version_cycle})
473
474         # for packaging, alpha to numbers
475         string(COMPARE EQUAL "${BLENDER_VERSION_CHAR}" "" _out_version_char_empty)
476         if(${_out_version_char_empty})
477                 set(BLENDER_VERSION_CHAR_INDEX "0")
478         else()
479                 set(_char_ls a b c d e f g h i j k l m n o p q r s t u v w x y z)
480                 list(FIND _char_ls ${BLENDER_VERSION_CHAR} _out_version_char_index)
481                 math(EXPR BLENDER_VERSION_CHAR_INDEX "${_out_version_char_index} + 1")
482                 unset(_char_ls)
483                 unset(_out_version_char_index)
484         endif()
485
486         unset(_out_subversion)
487         unset(_out_version_char)
488         unset(_out_version_char_empty)
489         unset(_out_version_cycle)
490
491         # message(STATUS "Version (Internal): ${BLENDER_VERSION}.${BLENDER_SUBVERSION}, Version (external): ${BLENDER_VERSION}${BLENDER_VERSION_CHAR}-${BLENDER_VERSION_CYCLE}")
492 endmacro()
493
494
495 # hacks to override initial project settings
496 # these macros must be called directly before/after project(Blender) 
497 macro(blender_project_hack_pre)
498         # ----------------
499         # MINGW HACK START
500         # ignore system set flag, use our own
501         # must be before project(...)
502         # if the user wants to add their own its ok after first run.
503         if(DEFINED CMAKE_C_STANDARD_LIBRARIES)
504                 set(_reset_standard_libraries OFF)
505         else()
506                 set(_reset_standard_libraries ON)
507         endif()
508
509         # ------------------
510         # GCC -O3 HACK START
511         # needed because O3 can cause problems but
512         # allow the builder to set O3 manually after.
513         if(DEFINED CMAKE_C_FLAGS_RELEASE)
514                 set(_reset_standard_cflags_rel OFF)
515         else()
516                 set(_reset_standard_cflags_rel ON)
517         endif()
518         if(DEFINED CMAKE_CXX_FLAGS_RELEASE)
519                 set(_reset_standard_cxxflags_rel OFF)
520         else()
521                 set(_reset_standard_cxxflags_rel ON)
522         endif()
523 endmacro()
524
525
526 macro(blender_project_hack_post)
527         # --------------
528         # MINGW HACK END
529         if (_reset_standard_libraries)
530                 # Must come after project(...)
531                 #
532                 # MINGW workaround for -ladvapi32 being included which surprisingly causes
533                 # string formatting of floats, eg: printf("%.*f", 3, value). to crash blender
534                 # with a meaningless stack trace. by overriding this flag we ensure we only
535                 # have libs we define and that cmake & scons builds match.
536                 set(CMAKE_C_STANDARD_LIBRARIES "" CACHE STRING "" FORCE)
537                 set(CMAKE_CXX_STANDARD_LIBRARIES "" CACHE STRING "" FORCE)
538                 mark_as_advanced(CMAKE_C_STANDARD_LIBRARIES)
539                 mark_as_advanced(CMAKE_CXX_STANDARD_LIBRARIES)
540         endif()
541         unset(_reset_standard_libraries)
542
543
544         # ----------------
545         # GCC -O3 HACK END
546         if(_reset_standard_cflags_rel)
547                 string(REGEX REPLACE "-O3" "-O2" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
548                 set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}" CACHE STRING "" FORCE)
549                 mark_as_advanced(CMAKE_C_FLAGS_RELEASE)
550         endif()
551
552         if(_reset_standard_cxxflags_rel)
553                 string(REGEX REPLACE "-O3" "-O2" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
554                 set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}" CACHE STRING "" FORCE)
555                 mark_as_advanced(CMAKE_CXX_FLAGS_RELEASE)
556         endif()
557
558         unset(_reset_standard_cflags_rel)
559         unset(_reset_standard_cxxflags_rel)
560
561         # ------------------------------------------------------------------
562         # workaround for omission in cmake 2.8.4's GNU.cmake, fixed in 2.8.5
563         if(CMAKE_COMPILER_IS_GNUCC)
564                 if(NOT DARWIN)
565                         set(CMAKE_INCLUDE_SYSTEM_FLAG_C "-isystem ")
566                 endif()
567         endif()
568
569 endmacro()