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373 lines
12 KiB
CMake
373 lines
12 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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#[=======================================================================[.rst:
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FindSDL_sound
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-------------
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Locates the SDL_sound library
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This module depends on SDL being found and must be called AFTER
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FindSDL.cmake is called.
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This module defines
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::
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SDL_SOUND_INCLUDE_DIR, where to find SDL_sound.h
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SDL_SOUND_FOUND, if false, do not try to link to SDL_sound
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SDL_SOUND_LIBRARIES, this contains the list of libraries that you need
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to link against.
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SDL_SOUND_EXTRAS, this is an optional variable for you to add your own
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flags to SDL_SOUND_LIBRARIES. This is prepended to SDL_SOUND_LIBRARIES.
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This is available mostly for cases this module failed to anticipate for
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and you must add additional flags. This is marked as ADVANCED.
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SDL_SOUND_VERSION_STRING, human-readable string containing the
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version of SDL_sound
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This module also defines (but you shouldn't need to use directly)
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::
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SDL_SOUND_LIBRARY, the name of just the SDL_sound library you would link
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against. Use SDL_SOUND_LIBRARIES for you link instructions and not this one.
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And might define the following as needed
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::
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MIKMOD_LIBRARY
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MODPLUG_LIBRARY
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OGG_LIBRARY
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VORBIS_LIBRARY
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SMPEG_LIBRARY
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FLAC_LIBRARY
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SPEEX_LIBRARY
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Typically, you should not use these variables directly, and you should
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use SDL_SOUND_LIBRARIES which contains SDL_SOUND_LIBRARY and the other
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audio libraries (if needed) to successfully compile on your system.
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Responds to the $SDLDIR and $SDLSOUNDDIR environmental variable that
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would correspond to the ./configure --prefix=$SDLDIR used in building
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SDL.
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On OSX, this will prefer the Framework version (if found) over others.
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People will have to manually change the cache values of SDL_LIBRARY to
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override this selectionor set the CMake environment CMAKE_INCLUDE_PATH
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to modify the search paths.
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#]=======================================================================]
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#[[
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This module is a bit more complicated than the
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other FindSDL* family modules. The reason is that SDL_sound can be
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compiled in a large variety of different ways which are independent of
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platform. SDL_sound may dynamically link against other 3rd party
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libraries to get additional codec support, such as Ogg Vorbis, SMPEG,
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ModPlug, MikMod, FLAC, Speex, and potentially others. Under some
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circumstances which I don't fully understand, there seems to be a
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requirement that dependent libraries of libraries you use must also be
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explicitly linked against in order to successfully compile. SDL_sound
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does not currently have any system in place to know how it was
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compiled. So this CMake module does the hard work in trying to
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discover which 3rd party libraries are required for building (if any).
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This module uses a brute force approach to create a test program that
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uses SDL_sound, and then tries to build it. If the build fails, it
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parses the error output for known symbol names to figure out which
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libraries are needed.
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#]]
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set(SDL_SOUND_EXTRAS "" CACHE STRING "SDL_sound extra flags")
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mark_as_advanced(SDL_SOUND_EXTRAS)
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# Find SDL_sound.h
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find_path(SDL_SOUND_INCLUDE_DIR SDL_sound.h
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HINTS
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ENV SDLSOUNDDIR
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ENV SDLDIR
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PATH_SUFFIXES SDL
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# path suffixes to search inside ENV{SDLDIR}
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include/SDL include/SDL12 include/SDL11 include
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)
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find_library(SDL_SOUND_LIBRARY
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NAMES SDL_sound
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HINTS
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ENV SDLSOUNDDIR
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ENV SDLDIR
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PATH_SUFFIXES lib VisualC/win32lib
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)
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if(SDL_FOUND AND SDL_SOUND_INCLUDE_DIR AND SDL_SOUND_LIBRARY)
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# CMake is giving me problems using TRY_COMPILE with the CMAKE_FLAGS
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# for the :STRING syntax if I have multiple values contained in a
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# single variable. This is a problem for the SDL_LIBRARY variable
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# because it does just that. When I feed this variable to the command,
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# only the first value gets the appropriate modifier (e.g. -I) and
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# the rest get dropped.
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# To get multiple single variables to work, I must separate them with a "\;"
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# I could go back and modify the FindSDL.cmake module, but that's kind of painful.
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# The solution would be to try something like:
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# string(APPEND SDL_TRY_COMPILE_LIBRARY_LIST "\;${CMAKE_THREAD_LIBS_INIT}")
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# Instead, it was suggested on the mailing list to write a temporary CMakeLists.txt
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# with a temporary test project and invoke that with TRY_COMPILE.
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# See message thread "Figuring out dependencies for a library in order to build"
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# 2005-07-16
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# try_compile(
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# MY_RESULT
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# ${CMAKE_BINARY_DIR}
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# ${PROJECT_SOURCE_DIR}/DetermineSoundLibs.c
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# CMAKE_FLAGS
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# -DINCLUDE_DIRECTORIES:STRING=${SDL_INCLUDE_DIR}\;${SDL_SOUND_INCLUDE_DIR}
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# -DLINK_LIBRARIES:STRING=${SDL_SOUND_LIBRARY}\;${SDL_LIBRARY}
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# OUTPUT_VARIABLE MY_OUTPUT
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# )
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# To minimize external dependencies, create a sdlsound test program
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# which will be used to figure out if additional link dependencies are
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# required for the link phase.
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file(WRITE ${PROJECT_BINARY_DIR}/CMakeTmp/DetermineSoundLibs.c
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"#include \"SDL_sound.h\"
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#include \"SDL.h\"
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int main(int argc, char* argv[])
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{
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Sound_AudioInfo desired;
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Sound_Sample* sample;
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SDL_Init(0);
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Sound_Init();
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/* This doesn't actually have to work, but Init() is a no-op
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* for some of the decoders, so this should force more symbols
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* to be pulled in.
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*/
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sample = Sound_NewSampleFromFile(argv[1], &desired, 4096);
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Sound_Quit();
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SDL_Quit();
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return 0;
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}"
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)
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# Calling
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# target_link_libraries(DetermineSoundLibs "${SDL_SOUND_LIBRARY} ${SDL_LIBRARY})
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# causes problems when SDL_LIBRARY looks like
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# /Library/Frameworks/SDL.framework;-framework Cocoa
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# The ;-framework Cocoa seems to be confusing CMake once the OS X
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# framework support was added. I was told that breaking up the list
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# would fix the problem.
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set(TMP_TRY_LIBS)
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foreach(lib ${SDL_SOUND_LIBRARY} ${SDL_LIBRARY})
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string(APPEND TMP_TRY_LIBS " \"${lib}\"")
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endforeach()
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# Write the CMakeLists.txt and test project
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# Weird, this is still sketchy. If I don't quote the variables
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# in the TARGET_LINK_LIBRARIES, I seem to loose everything
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# in the SDL_LIBRARY string after the "-framework".
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# But if I quote the stuff in INCLUDE_DIRECTORIES, it doesn't work.
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file(WRITE ${PROJECT_BINARY_DIR}/CMakeTmp/CMakeLists.txt
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"cmake_minimum_required(VERSION ${CMAKE_VERSION})
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project(DetermineSoundLibs)
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include_directories(${SDL_INCLUDE_DIR} ${SDL_SOUND_INCLUDE_DIR})
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add_executable(DetermineSoundLibs DetermineSoundLibs.c)
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target_link_libraries(DetermineSoundLibs ${TMP_TRY_LIBS})"
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)
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try_compile(
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MY_RESULT
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PROJECT DetermineSoundLibs
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SOURCE_DIR ${PROJECT_BINARY_DIR}/CMakeTmp
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BINARY_DIR ${PROJECT_BINARY_DIR}/CMakeTmp
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OUTPUT_VARIABLE MY_OUTPUT
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)
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if(NOT MY_RESULT)
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# I expect that MPGLIB, VOC, WAV, AIFF, and SHN are compiled in statically.
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# I think Timidity is also compiled in statically.
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# I've never had to explcitly link against Quicktime, so I'll skip that for now.
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set(SDL_SOUND_LIBRARIES_TMP ${SDL_SOUND_LIBRARY})
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# Find MikMod
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if("${MY_OUTPUT}" MATCHES "MikMod_")
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find_library(MIKMOD_LIBRARY
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NAMES libmikmod-coreaudio mikmod
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PATHS
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ENV MIKMODDIR
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ENV SDLSOUNDDIR
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ENV SDLDIR
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/opt
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PATH_SUFFIXES
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lib
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)
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if(MIKMOD_LIBRARY)
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set(SDL_SOUND_LIBRARIES_TMP ${SDL_SOUND_LIBRARIES_TMP} ${MIKMOD_LIBRARY})
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endif(MIKMOD_LIBRARY)
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endif("${MY_OUTPUT}" MATCHES "MikMod_")
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# Find ModPlug
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if("${MY_OUTPUT}" MATCHES "MODPLUG_")
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find_library(MODPLUG_LIBRARY
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NAMES modplug
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PATHS
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ENV MODPLUGDIR
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ENV SDLSOUNDDIR
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ENV SDLDIR
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/opt
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PATH_SUFFIXES
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lib
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)
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if(MODPLUG_LIBRARY)
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set(SDL_SOUND_LIBRARIES_TMP ${SDL_SOUND_LIBRARIES_TMP} ${MODPLUG_LIBRARY})
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endif()
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endif()
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# Find Ogg and Vorbis
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if("${MY_OUTPUT}" MATCHES "ov_")
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find_library(VORBIS_LIBRARY
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NAMES vorbis Vorbis VORBIS
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PATHS
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ENV VORBISDIR
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ENV OGGDIR
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ENV SDLSOUNDDIR
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ENV SDLDIR
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/opt
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PATH_SUFFIXES
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lib
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)
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if(VORBIS_LIBRARY)
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set(SDL_SOUND_LIBRARIES_TMP ${SDL_SOUND_LIBRARIES_TMP} ${VORBIS_LIBRARY})
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endif()
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find_library(OGG_LIBRARY
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NAMES ogg Ogg OGG
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PATHS
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ENV OGGDIR
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ENV VORBISDIR
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ENV SDLSOUNDDIR
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ENV SDLDIR
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/opt
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PATH_SUFFIXES
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lib
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)
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if(OGG_LIBRARY)
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set(SDL_SOUND_LIBRARIES_TMP ${SDL_SOUND_LIBRARIES_TMP} ${OGG_LIBRARY})
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endif()
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endif()
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# Find SMPEG
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if("${MY_OUTPUT}" MATCHES "SMPEG_")
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find_library(SMPEG_LIBRARY
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NAMES smpeg SMPEG Smpeg SMpeg
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PATHS
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ENV SMPEGDIR
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ENV SDLSOUNDDIR
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ENV SDLDIR
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/opt
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PATH_SUFFIXES
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lib
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)
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if(SMPEG_LIBRARY)
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set(SDL_SOUND_LIBRARIES_TMP ${SDL_SOUND_LIBRARIES_TMP} ${SMPEG_LIBRARY})
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endif()
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endif()
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# Find FLAC
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if("${MY_OUTPUT}" MATCHES "FLAC_")
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find_library(FLAC_LIBRARY
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NAMES flac FLAC
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PATHS
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ENV FLACDIR
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ENV SDLSOUNDDIR
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ENV SDLDIR
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/opt
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PATH_SUFFIXES
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lib
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)
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if(FLAC_LIBRARY)
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set(SDL_SOUND_LIBRARIES_TMP ${SDL_SOUND_LIBRARIES_TMP} ${FLAC_LIBRARY})
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endif()
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endif()
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# Hmmm...Speex seems to depend on Ogg. This might be a problem if
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# the TRY_COMPILE attempt gets blocked at SPEEX before it can pull
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# in the Ogg symbols. I'm not sure if I should duplicate the ogg stuff
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# above for here or if two ogg entries will screw up things.
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if("${MY_OUTPUT}" MATCHES "speex_")
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find_library(SPEEX_LIBRARY
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NAMES speex SPEEX
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PATHS
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ENV SPEEXDIR
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ENV SDLSOUNDDIR
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ENV SDLDIR
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/opt
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PATH_SUFFIXES
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lib
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)
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if(SPEEX_LIBRARY)
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set(SDL_SOUND_LIBRARIES_TMP ${SDL_SOUND_LIBRARIES_TMP} ${SPEEX_LIBRARY})
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endif()
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# Find OGG (needed for Speex)
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# We might have already found Ogg for Vorbis, so skip it if so.
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if(NOT OGG_LIBRARY)
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find_library(OGG_LIBRARY
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NAMES ogg Ogg OGG
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PATHS
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ENV OGGDIR
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ENV VORBISDIR
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ENV SPEEXDIR
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ENV SDLSOUNDDIR
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ENV SDLDIR
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/opt
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PATH_SUFFIXES lib
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)
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if(OGG_LIBRARY)
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set(SDL_SOUND_LIBRARIES_TMP ${SDL_SOUND_LIBRARIES_TMP} ${OGG_LIBRARY})
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endif()
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endif()
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endif()
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set(SDL_SOUND_LIBRARIES ${SDL_SOUND_EXTRAS} ${SDL_SOUND_LIBRARIES_TMP})
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else()
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set(SDL_SOUND_LIBRARIES ${SDL_SOUND_EXTRAS} ${SDL_SOUND_LIBRARY})
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endif()
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endif()
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if(SDL_SOUND_INCLUDE_DIR AND EXISTS "${SDL_SOUND_INCLUDE_DIR}/SDL_sound.h")
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file(STRINGS "${SDL_SOUND_INCLUDE_DIR}/SDL_sound.h" SDL_SOUND_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SOUND_VER_MAJOR[ \t]+[0-9]+$")
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file(STRINGS "${SDL_SOUND_INCLUDE_DIR}/SDL_sound.h" SDL_SOUND_VERSION_MINOR_LINE REGEX "^#define[ \t]+SOUND_VER_MINOR[ \t]+[0-9]+$")
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file(STRINGS "${SDL_SOUND_INCLUDE_DIR}/SDL_sound.h" SDL_SOUND_VERSION_PATCH_LINE REGEX "^#define[ \t]+SOUND_VER_PATCH[ \t]+[0-9]+$")
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string(REGEX REPLACE "^#define[ \t]+SOUND_VER_MAJOR[ \t]+([0-9]+)$" "\\1" SDL_SOUND_VERSION_MAJOR "${SDL_SOUND_VERSION_MAJOR_LINE}")
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string(REGEX REPLACE "^#define[ \t]+SOUND_VER_MINOR[ \t]+([0-9]+)$" "\\1" SDL_SOUND_VERSION_MINOR "${SDL_SOUND_VERSION_MINOR_LINE}")
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string(REGEX REPLACE "^#define[ \t]+SOUND_VER_PATCH[ \t]+([0-9]+)$" "\\1" SDL_SOUND_VERSION_PATCH "${SDL_SOUND_VERSION_PATCH_LINE}")
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set(SDL_SOUND_VERSION_STRING ${SDL_SOUND_VERSION_MAJOR}.${SDL_SOUND_VERSION_MINOR}.${SDL_SOUND_VERSION_PATCH})
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unset(SDL_SOUND_VERSION_MAJOR_LINE)
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unset(SDL_SOUND_VERSION_MINOR_LINE)
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unset(SDL_SOUND_VERSION_PATCH_LINE)
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unset(SDL_SOUND_VERSION_MAJOR)
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unset(SDL_SOUND_VERSION_MINOR)
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unset(SDL_SOUND_VERSION_PATCH)
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endif()
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL_sound
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REQUIRED_VARS SDL_SOUND_LIBRARY SDL_SOUND_INCLUDE_DIR
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VERSION_VAR SDL_SOUND_VERSION_STRING)
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