clock_gettime is available only when _POSIX_TIMERS is greater than 0
[openal-soft.git] / CMakeLists.txt
blob3011b757d7f9446f70a8b4f7137e58b03a20b2bf
1 # CMake build file list for OpenAL
3 CMAKE_MINIMUM_REQUIRED(VERSION 2.4)
5 IF(COMMAND CMAKE_POLICY)
6   CMAKE_POLICY(SET CMP0003 NEW)
7 ENDIF(COMMAND CMAKE_POLICY)
9 SET(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
11 INCLUDE(CheckFunctionExists)
12 INCLUDE(CheckLibraryExists)
13 INCLUDE(CheckSharedLibraryExists)
14 INCLUDE(CheckIncludeFile)
15 INCLUDE(CheckIncludeFiles)
16 INCLUDE(CheckSymbolExists)
17 INCLUDE(CheckCCompilerFlag)
18 INCLUDE(CheckCSourceCompiles)
19 INCLUDE(CheckTypeSize)
22 PROJECT(OpenAL C)
25 SET(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS TRUE)
28 OPTION(ALSA    "Check for ALSA backend"                ON)
29 OPTION(OSS     "Check for OSS backend"                 ON)
30 OPTION(SOLARIS "Check for Solaris backend"             ON)
31 OPTION(DSOUND  "Check for DirectSound backend"         ON)
32 OPTION(WINMM   "Check for Windows Multimedia backend"  ON)
33 OPTION(PORTAUDIO  "Check for PortAudio backend"        ON)
34 OPTION(PULSEAUDIO "Check for PulseAudio backend"       ON)
36 OPTION(DLOPEN  "Check for the dlopen API for loading optional libs"  ON)
38 OPTION(WERROR  "Treat compile warnings as errors"      OFF)
40 OPTION(EXAMPLES  "Build example programs"              ON)
42 OPTION(ALSOFT_CONFIG "Install alsoft.conf configuration file" OFF)
45 IF(WIN32)
46     SET(LIBNAME OpenAL32)
47     ADD_DEFINITIONS("-D_WIN32")
48 ELSE()
49     SET(LIBNAME openal)
50 ENDIF()
52 SET(LIB_MAJOR_VERSION "1")
53 SET(LIB_MINOR_VERSION "11")
54 SET(LIB_BUILD_VERSION "753")
55 SET(LIB_VERSION "${LIB_MAJOR_VERSION}.${LIB_MINOR_VERSION}.${LIB_BUILD_VERSION}")
56 IF(NOT DEFINED LIB_INSTALL_DIR)
57   SET(LIB_INSTALL_DIR "lib${LIB_SUFFIX}")
58 ENDIF(NOT DEFINED LIB_INSTALL_DIR)
61 CHECK_TYPE_SIZE("long" SIZEOF_LONG)
62 CHECK_TYPE_SIZE("long long" SIZEOF_LONG_LONG)
63 CHECK_TYPE_SIZE("unsigned int" SIZEOF_UINT)
64 CHECK_TYPE_SIZE("void*" SIZEOF_VOIDP)
67 # Add definitions, compiler switches, etc.
68 INCLUDE_DIRECTORIES(OpenAL32/Include include "${OpenAL_BINARY_DIR}")
70 IF(NOT CMAKE_BUILD_TYPE)
71     SET(CMAKE_BUILD_TYPE RelWithDebInfo CACHE STRING
72         "Choose the type of build, options are: Debug Release RelWithDebInfo MinSizeRel."
73         FORCE)
74 ENDIF()
75 IF(NOT CMAKE_DEBUG_POSTFIX)
76     SET(CMAKE_DEBUG_POSTFIX "" CACHE STRING
77         "Library postfix for debug builds. Normally left blank."
78         FORCE)
79 ENDIF()
81 IF(NOT DXSDK_DIR)
82     STRING(REGEX REPLACE "\\\\" "/" DXSDK_DIR "$ENV{DXSDK_DIR}")
83 ELSE()
84     STRING(REGEX REPLACE "\\\\" "/" DXSDK_DIR "${DXSDK_DIR}")
85 ENDIF()
86 IF(DXSDK_DIR)
87     MESSAGE(STATUS "Using DirectX SDK directory: ${DXSDK_DIR}")
88     SET(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} "${DXSDK_DIR}/Include")
89     INCLUDE_DIRECTORIES("${DXSDK_DIR}/Include")
90     LINK_DIRECTORIES("${DXSDK_DIR}/Lib")
91 ENDIF()
93 IF(MSVC)
94     # ???
95     SET(CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO} -D_DEBUG")
96     SET(CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL} -DNDEBUG")
97     SET(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -DNDEBUG")
98     SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -D_DEBUG")
99     ADD_DEFINITIONS(-D_CRT_SECURE_NO_WARNINGS)
100 ELSE()
101     ADD_DEFINITIONS(-Wall)
102     CHECK_C_COMPILER_FLAG(-Wextra HAVE_W_EXTRA)
103     IF(HAVE_W_EXTRA)
104         ADD_DEFINITIONS(-Wextra)
105     ENDIF()
107     IF(WERROR)
108         ADD_DEFINITIONS(-Werror)
109     ENDIF()
111     SET(CMAKE_C_FLAGS_RELWITHDEBINFO "-g -O2 -funroll-loops -D_DEBUG" CACHE STRING
112         "Flags used by the compiler during Release with Debug Info builds."
113         FORCE)
114     SET(CMAKE_C_FLAGS_MINSIZEREL "-Os -DNDEBUG" CACHE STRING
115         "Flags used by the compiler during release minsize builds."
116         FORCE)
117     SET(CMAKE_C_FLAGS_RELEASE "-O2 -funroll-loops -fomit-frame-pointer -DNDEBUG" CACHE STRING
118         "Flags used by the compiler during release builds"
119         FORCE)
120     SET(CMAKE_C_FLAGS_DEBUG "-g3 -D_DEBUG" CACHE STRING
121         "Flags used by the compiler during debug builds."
122         FORCE)
124     # Set visibility options if available
125     IF(NOT WIN32)
126         CHECK_C_SOURCE_COMPILES("int foo() __attribute__((destructor));
127                                  int main() {return 0;}" HAVE_GCC_DESTRUCTOR)
129         CHECK_C_COMPILER_FLAG(-fvisibility=hidden HAVE_VISIBILITY_SWITCH)
130         IF(HAVE_VISIBILITY_SWITCH)
131             CHECK_C_SOURCE_COMPILES("int foo() __attribute__((visibility(\"default\")));
132                                      int main() {return 0;}" HAVE_GCC_VISIBILITY)
133             IF(HAVE_GCC_VISIBILITY)
134                 ADD_DEFINITIONS(-fvisibility=hidden -DHAVE_GCC_VISIBILITY)
135             ENDIF()
136         ENDIF()
137     ENDIF()
138 ENDIF()
140 CHECK_C_SOURCE_COMPILES("int foo(const char *str, ...) __attribute__((format(printf, 1, 2)));
141                          int main() {return 0;}" HAVE_GCC_FORMAT)
143 CHECK_INCLUDE_FILE(fenv.h HAVE_FENV_H)
144 CHECK_INCLUDE_FILE(float.h HAVE_FLOAT_H)
146 CHECK_LIBRARY_EXISTS(m  powf   "" HAVE_POWF)
147 CHECK_LIBRARY_EXISTS(m  sqrtf  "" HAVE_SQRTF)
148 CHECK_LIBRARY_EXISTS(m  acosf  "" HAVE_ACOSF)
149 CHECK_LIBRARY_EXISTS(m  atanf  "" HAVE_ATANF)
150 CHECK_LIBRARY_EXISTS(m  fabsf  "" HAVE_FABSF)
151 IF(HAVE_FENV_H)
152     CHECK_LIBRARY_EXISTS(m  fesetround  "" HAVE_FESETROUND)
153 ENDIF()
154 IF(HAVE_SQRTF OR HAVE_ACOSF OR HAVE_ATANF OR HAVE_FABSF OR HAVE_FESETROUND)
155     SET(EXTRA_LIBS m ${EXTRA_LIBS})
156 ENDIF()
157 CHECK_FUNCTION_EXISTS(strtof HAVE_STRTOF)
158 CHECK_FUNCTION_EXISTS(_controlfp HAVE__CONTROLFP)
160 CHECK_FUNCTION_EXISTS(stat HAVE_STAT)
161 CHECK_FUNCTION_EXISTS(strcasecmp HAVE_STRCASECMP)
162 IF(NOT HAVE_STRCASECMP)
163     CHECK_FUNCTION_EXISTS(_stricmp HAVE__STRICMP)
164     IF(NOT HAVE__STRICMP)
165         MESSAGE(FATAL_ERROR "No case-insensitive compare function found, please report!")
166     ENDIF()
168     ADD_DEFINITIONS(-Dstrcasecmp=_stricmp)
169 ENDIF()
171 CHECK_FUNCTION_EXISTS(strncasecmp HAVE_STRNCASECMP)
172 IF(NOT HAVE_STRNCASECMP)
173     CHECK_FUNCTION_EXISTS(_strnicmp HAVE__STRNICMP)
174     IF(NOT HAVE__STRNICMP)
175         MESSAGE(FATAL_ERROR "No case-insensitive size-limitted compare function found, please report!")
176     ENDIF()
178     ADD_DEFINITIONS(-Dstrncasecmp=_strnicmp)
179 ENDIF()
181 CHECK_FUNCTION_EXISTS(snprintf HAVE_SNPRINTF)
182 IF(NOT HAVE_SNPRINTF)
183     CHECK_FUNCTION_EXISTS(_snprintf HAVE__SNPRINTF)
184     IF(NOT HAVE__SNPRINTF)
185         MESSAGE(FATAL_ERROR "No snprintf function found, please report!")
186     ENDIF()
188     ADD_DEFINITIONS(-Dsnprintf=_snprintf)
189 ENDIF()
191 CHECK_FUNCTION_EXISTS(vsnprintf HAVE_VSNPRINTF)
192 IF(NOT HAVE_VSNPRINTF)
193     CHECK_FUNCTION_EXISTS(_vsnprintf HAVE__VSNPRINTF)
194     IF(NOT HAVE__VSNPRINTF)
195         MESSAGE(FATAL_ERROR "No vsnprintf function found, please report!")
196     ENDIF()
198     ADD_DEFINITIONS(-Dvsnprintf=_vsnprintf)
199 ENDIF()
201 CHECK_SYMBOL_EXISTS(isnan math.h HAVE_ISNAN)
202 IF(NOT HAVE_ISNAN)
203     CHECK_FUNCTION_EXISTS(_isnan HAVE__ISNAN)
204     IF(NOT HAVE__ISNAN)
205         MESSAGE(FATAL_ERROR "No isnan function found, please report!")
206     ENDIF()
208     ADD_DEFINITIONS(-Disnan=_isnan)
209 ENDIF()
212 # Check for the dlopen API (for dynamicly loading backend libs)
213 IF(DLOPEN)
214     CHECK_INCLUDE_FILE(dlfcn.h HAVE_DLFCN_H)
215     IF(HAVE_DLFCN_H)
216         CHECK_LIBRARY_EXISTS(dl dlopen "" HAVE_LIBDL)
217         IF(HAVE_LIBDL)
218             SET(EXTRA_LIBS dl ${EXTRA_LIBS})
219         ENDIF()
220     ENDIF()
221 ENDIF()
223 # Check if we have Windows headers
224 CHECK_INCLUDE_FILE(windows.h HAVE_WINDOWS_H -D_WIN32_WINNT=0x0500)
225 IF(NOT HAVE_WINDOWS_H)
226     CHECK_FUNCTION_EXISTS(gettimeofday HAVE_GETTIMEOFDAY)
227     IF(NOT HAVE_GETTIMEOFDAY)
228         MESSAGE(FATAL_ERROR "No timing function found!")
229     ENDIF()
231     CHECK_FUNCTION_EXISTS(nanosleep HAVE_NANOSLEEP)
232     IF(NOT HAVE_NANOSLEEP)
233         MESSAGE(FATAL_ERROR "No sleep function found!")
234     ENDIF()
236     CHECK_C_COMPILER_FLAG(-pthread HAVE_PTHREAD)
237     IF(HAVE_PTHREAD)
238         ADD_DEFINITIONS(-pthread)
239         SET(EXTRA_LIBS ${EXTRA_LIBS} -pthread)
240     ENDIF()
242     # We need pthreads outside of Windows
243     CHECK_INCLUDE_FILE(pthread.h HAVE_PTHREAD_H)
244     IF(NOT HAVE_PTHREAD_H)
245         MESSAGE(FATAL_ERROR "PThreads is required for non-Windows builds!")
246     ENDIF()
247     # Some systems need pthread_np.h to get recursive mutexes
248     CHECK_INCLUDE_FILES("pthread.h;pthread_np.h" HAVE_PTHREAD_NP_H)
250     # _GNU_SOURCE is needed on some systems for extra attributes, and
251     # _REENTRANT is needed for libc thread-safety
252     ADD_DEFINITIONS(-D_GNU_SOURCE=1)
253     CHECK_LIBRARY_EXISTS(pthread pthread_create "" HAVE_LIBPTHREAD)
254     IF(HAVE_LIBPTHREAD)
255         SET(EXTRA_LIBS pthread ${EXTRA_LIBS})
256     ENDIF()
258     CHECK_LIBRARY_EXISTS(pthread pthread_setschedparam "" HAVE_PTHREAD_SETSCHEDPARAM)
260     CHECK_LIBRARY_EXISTS(rt clock_gettime "" HAVE_LIBRT)
261     IF(HAVE_LIBRT)
262         SET(EXTRA_LIBS rt ${EXTRA_LIBS})
263     ENDIF()
264 ENDIF()
266 # Check for a 64-bit type
267 CHECK_INCLUDE_FILE(stdint.h HAVE_STDINT_H)
268 IF(NOT HAVE_STDINT_H)
269     IF(HAVE_WINDOWS_H)
270         CHECK_C_SOURCE_COMPILES("\#define _WIN32_WINNT 0x0500
271                                  \#include <windows.h>
272                                  __int64 foo;
273                                  int main() {return 0;}" HAVE___INT64)
274     ENDIF()
275     IF(NOT HAVE___INT64)
276         IF(NOT SIZEOF_LONG MATCHES "8")
277             IF(NOT SIZEOF_LONG_LONG MATCHES "8")
278                 MESSAGE(FATAL_ERROR "No 64-bit types found, please report!")
279             ENDIF()
280         ENDIF()
281     ENDIF()
282 ENDIF()
285 SET(OPENAL_OBJS  OpenAL32/alAuxEffectSlot.c
286                  OpenAL32/alBuffer.c
287                  OpenAL32/alDatabuffer.c
288                  OpenAL32/alEffect.c
289                  OpenAL32/alError.c
290                  OpenAL32/alExtension.c
291                  OpenAL32/alFilter.c
292                  OpenAL32/alListener.c
293                  OpenAL32/alSource.c
294                  OpenAL32/alState.c
295                  OpenAL32/alThunk.c
297 SET(ALC_OBJS  Alc/ALc.c
298               Alc/ALu.c
299               Alc/alcConfig.c
300               Alc/alcEcho.c
301               Alc/alcReverb.c
302               Alc/alcRing.c
303               Alc/alcThread.c
304               Alc/bs2b.c
305               Alc/wave.c
308 SET(BACKENDS "")
310 # Check ALSA backend
311 IF(ALSA)
312     CHECK_INCLUDE_FILE(alsa/asoundlib.h HAVE_ALSA_ASOUNDLIB_H)
313     IF(HAVE_ALSA_ASOUNDLIB_H)
314         CHECK_SHARED_LIBRARY_EXISTS(asound snd_pcm_open 4 "" HAVE_LIBASOUND)
315         IF(HAVE_LIBASOUND OR HAVE_DLFCN_H OR WIN32)
316             SET(HAVE_ALSA 1)
317             SET(ALC_OBJS  ${ALC_OBJS} Alc/alsa.c)
318             IF(HAVE_DLFCN_H OR WIN32)
319                 SET(BACKENDS  "${BACKENDS} ALSA,")
320             ELSE()
321                 SET(BACKENDS  "${BACKENDS} ALSA \(linked\),")
322                 SET(EXTRA_LIBS asound ${EXTRA_LIBS})
323             ENDIF()
324         ENDIF()
325     ENDIF()
326 ENDIF()
328 # Check OSS backend
329 IF(OSS)
330     CHECK_INCLUDE_FILE(sys/soundcard.h HAVE_SYS_SOUNDCARD_H)
331     IF(HAVE_SYS_SOUNDCARD_H)
332         SET(HAVE_OSS 1)
333         SET(ALC_OBJS  ${ALC_OBJS} Alc/oss.c)
334         SET(BACKENDS  "${BACKENDS} OSS,")
335     ENDIF()
336 ENDIF()
338 # Check Solaris backend
339 IF(SOLARIS)
340     CHECK_INCLUDE_FILE(sys/audioio.h HAVE_SYS_AUDIOIO_H)
341     IF(HAVE_SYS_AUDIOIO_H)
342         SET(HAVE_SOLARIS 1)
343         SET(ALC_OBJS  ${ALC_OBJS} Alc/solaris.c)
344         SET(BACKENDS  "${BACKENDS} Solaris,")
345     ENDIF()
346 ENDIF()
348 # Check DSound/MMSystem backend
349 IF(DSOUND)
350     CHECK_INCLUDE_FILE(dsound.h HAVE_DSOUND_H)
351     IF(HAVE_DSOUND_H)
352         CHECK_SHARED_LIBRARY_EXISTS(dsound DirectSoundCreate 3 "" HAVE_LIBDSOUND)
353         IF(HAVE_LIBDSOUND OR HAVE_DLFCN_H OR WIN32)
354             SET(HAVE_DSOUND 1)
355             SET(ALC_OBJS  ${ALC_OBJS} Alc/dsound.c)
357             IF(HAVE_DLFCN_H OR WIN32)
358                 SET(BACKENDS  "${BACKENDS} DirectSound,")
359             ELSE()
360                 SET(BACKENDS  "${BACKENDS} DirectSound \(linked\),")
361                 SET(EXTRA_LIBS dsound ${EXTRA_LIBS})
362             ENDIF()
363         ENDIF()
364     ENDIF()
365 ENDIF()
366 IF(HAVE_WINDOWS_H)
367     IF(WINMM)
368         CHECK_INCLUDE_FILES("windows.h;mmsystem.h" HAVE_MMSYSTEM_H -D_WIN32_WINNT=0x0500)
369         IF(HAVE_MMSYSTEM_H)
370             CHECK_SHARED_LIBRARY_EXISTS(winmm waveInOpen 6 "" HAVE_LIBWINMM)
371             IF(HAVE_LIBWINMM)
372                 SET(HAVE_WINMM 1)
373                 SET(ALC_OBJS  ${ALC_OBJS} Alc/winmm.c)
374                 SET(BACKENDS  "${BACKENDS} WinMM,")
376                 SET(EXTRA_LIBS winmm ${EXTRA_LIBS})
377             ENDIF()
378         ENDIF()
379     ENDIF()
380 ENDIF()
382 # Check PortAudio backend
383 IF(PORTAUDIO)
384     CHECK_INCLUDE_FILE(portaudio.h HAVE_PORTAUDIO_H)
385     IF(HAVE_PORTAUDIO_H)
386         CHECK_SHARED_LIBRARY_EXISTS(portaudio Pa_Initialize 0 "" HAVE_LIBPORTAUDIO)
387         IF(HAVE_LIBPORTAUDIO OR HAVE_DLFCN_H OR WIN32)
388             SET(HAVE_PORTAUDIO 1)
389             SET(ALC_OBJS  ${ALC_OBJS} Alc/portaudio.c)
390             IF(HAVE_DLFCN_H OR WIN32)
391                 SET(BACKENDS  "${BACKENDS} PortAudio,")
392             ELSE()
393                 SET(BACKENDS  "${BACKENDS} PortAudio \(linked\),")
394                 SET(EXTRA_LIBS portaudio ${EXTRA_LIBS})
395             ENDIF()
396         ENDIF()
397     ENDIF()
398 ENDIF()
400 # Check PortAudio backend
401 IF(PULSEAUDIO)
402     CHECK_INCLUDE_FILE(pulse/pulseaudio.h HAVE_PULSE_PULSEAUDIO_H)
403     IF(HAVE_PULSE_PULSEAUDIO_H)
404         CHECK_SHARED_LIBRARY_EXISTS(pulse pa_context_new 2 "" HAVE_LIBPULSE)
405         IF(HAVE_LIBPULSE OR HAVE_DLFCN_H OR WIN32)
406             SET(HAVE_PULSEAUDIO 1)
407             SET(ALC_OBJS  ${ALC_OBJS} Alc/pulseaudio.c)
408             IF(HAVE_DLFCN_H OR WIN32)
409                 SET(BACKENDS  "${BACKENDS} PulseAudio,")
410             ELSE()
411                 SET(BACKENDS  "${BACKENDS} PulseAudio \(linked\),")
412                 SET(EXTRA_LIBS pulse ${EXTRA_LIBS})
413             ENDIF()
414         ENDIF()
415     ENDIF()
416 ENDIF()
418 # This is always available
419 SET(BACKENDS  "${BACKENDS} WaveFile")
421 # Needed for openal.pc.in
422 SET(prefix ${CMAKE_INSTALL_PREFIX})
423 SET(exec_prefix "\${prefix}")
424 SET(libdir "\${exec_prefix}/${LIB_INSTALL_DIR}")
425 SET(bindir "\${exec_prefix}/bin")
426 SET(includedir "\${prefix}/include")
427 SET(PACKAGE_VERSION "${LIB_VERSION}")
429 # End configuration
430 CONFIGURE_FILE(
431     "${OpenAL_SOURCE_DIR}/config.h.in"
432     "${OpenAL_BINARY_DIR}/config.h")
433 CONFIGURE_FILE(
434     "${OpenAL_SOURCE_DIR}/openal.pc.in"
435     "${OpenAL_BINARY_DIR}/openal.pc"
436     @ONLY)
438 ADD_DEFINITIONS(-DAL_BUILD_LIBRARY)
440 # Build a library
441 IF(NOT LIBTYPE)
442     SET(LIBTYPE SHARED)
443 ENDIF()
444 ADD_LIBRARY(${LIBNAME} ${LIBTYPE} ${OPENAL_OBJS} ${ALC_OBJS})
445 SET_TARGET_PROPERTIES(${LIBNAME} PROPERTIES VERSION ${LIB_VERSION}
446                                             SOVERSION ${LIB_MAJOR_VERSION})
447 IF(WIN32)
448     SET_TARGET_PROPERTIES(${LIBNAME} PROPERTIES PREFIX "")
449 ENDIF()
451 TARGET_LINK_LIBRARIES(${LIBNAME} ${EXTRA_LIBS})
453 # Add an install target here
454 INSTALL(TARGETS ${LIBNAME}
455         RUNTIME DESTINATION bin
456         LIBRARY DESTINATION ${LIB_INSTALL_DIR}
457         ARCHIVE DESTINATION ${LIB_INSTALL_DIR}
459 INSTALL(FILES include/AL/al.h
460               include/AL/alc.h
461               include/AL/alext.h
462               include/AL/efx.h
463         DESTINATION include/AL
465 INSTALL(FILES "${OpenAL_BINARY_DIR}/openal.pc"
466         DESTINATION "${LIB_INSTALL_DIR}/pkgconfig")
468 # Install alsoft.conf configuration file
469 IF(ALSOFT_CONFIG)
470     INSTALL(FILES alsoftrc.sample
471             DESTINATION /etc/openal
472             RENAME alsoft.conf
473     )
474 ENDIF()
476 IF(EXAMPLES)
477     ADD_EXECUTABLE(openal-info examples/openal-info.c)
478     TARGET_LINK_LIBRARIES(openal-info ${LIBNAME})
479     INSTALL(TARGETS openal-info
480             RUNTIME DESTINATION bin
481             LIBRARY DESTINATION ${LIB_INSTALL_DIR}
482             ARCHIVE DESTINATION ${LIB_INSTALL_DIR}
483     )
484 ENDIF()
486 MESSAGE(STATUS "")
487 MESSAGE(STATUS "Building OpenAL with support for the following backends:")
488 MESSAGE(STATUS "    ${BACKENDS}")
489 MESSAGE(STATUS "")
491 IF(WIN32)
492     IF(NOT HAVE_DSOUND)
493         MESSAGE(STATUS "WARNING: Building the Windows version without DirectSound output")
494         MESSAGE(STATUS "         This is probably NOT what you want!")
495         MESSAGE(STATUS "")
496     ENDIF()
497 ENDIF()