[CMake] Linking problems

David Cole david.cole at kitware.com
Thu Apr 16 16:20:47 EDT 2009 

Looks to me like COREAUDIO and friends are set incorrectly. COREAUDIO should
be "-framework;Coreaudio" in order to use it as a framework with
target_link_libraries... (not the full path to the framework library
itself...)


On Thu, Apr 16, 2009 at 10:22 AM, John Dey <jsdey at optonline.net> wrote:

> Hi List,
>
> I am getting undefined symbols while linking up a program that I can create
> by hand (details shown below).  I think I have set cmake to duplicate but it
> can't find symbols.  Any help would be greatly appreciated.  Thanks.
>
> John
>
> Hand compile and link:
>
>
> g++ -O3 -Wall -g -D__GXX__  -D__LITTLE_ENDIAN__  -D__MACOSX_CORE__ -c
> Stk.cpp -o Release/Stk.o
> g++ -O3 -Wall -g -D__GXX__  -D__LITTLE_ENDIAN__  -D__MACOSX_CORE__ -c
> MidiFileIn.cpp -o Release/MidiFileIn.o
> g++ -O3 -Wall -g -D__GXX__  -D__LITTLE_ENDIAN__  -D__MACOSX_CORE__ -c
> RtMidi.cpp -o Release/RtMidi.o
> g++ -O3 -Wall -g -D__GXX__  -D__LITTLE_ENDIAN__  -D__MACOSX_CORE__ -o
> playsmf playsmf.cpp Release/Stk.o Release/MidiFileIn.o Release/RtMidi.o
> -lpthread -lm  -framework CoreAudio -framework CoreFoundation -framework
> CoreMidi
>
> CMakeLists.txt:
>
> project (playsmf)
> cmake_minimum_required(VERSION 2.6)
> add_definitions(-D__LITTLE_ENDIAN__ -D__MACOS_CORE__ -D__GXX__ -g -Wall
> -03)
> include_directories("${PROJECT_SOURCE_DIR}")
> add_executable(playsmf playsmf.cpp MidiFileIn.cpp RtMidi.cpp Stk.cpp)
> find_library(COREAUDIO CoreAudio "/usr")
> find_library(COREFOUNDATION CoreFoundation "/")
> find_library(COREMIDI CoreMidi "/")
> find_library(PTHREAD pthread "/")
> find_library(M m "/")
> target_link_libraries(playsmf ${COREAUDIO} ${COREFOUNDATION}
>                     ${COREMIDI} ${PTHREAD} ${M}
> )
>
> Error messages:
>
> Linking CXX executable playsmf
> Undefined symbols:
>  "RtMidiOut::initialize()", referenced from:
>      RtMidiOut::RtMidiOut()in RtMidi.cpp.o
>  "RtMidiOut::sendMessage(std::vector<unsigned char, std::allocator<unsigned
> char> >*)", referenced from:
>      _main in playsmf.cpp.o
>      _main in playsmf.cpp.o
>  "vtable for RtMidiOut", referenced from:
>      __ZTV9RtMidiOut$non_lazy_ptr in RtMidi.cpp.o
>  "vtable for RtMidiIn", referenced from:
>      __ZTV8RtMidiIn$non_lazy_ptr in RtMidi.cpp.o
>  "RtMidiIn::initialize()", referenced from:
>      RtMidiIn::RtMidiIn()in RtMidi.cpp.o
> ld: symbol(s) not found
> collect2: ld returned 1 exit status
> make[2]: *** [playsmf] Error 1
> make[1]: *** [CMakeFiles/playsmf.dir/all] Error 2
> make: *** [all] Error 2
>
> Cache:
>
> ########################
> # EXTERNAL cache entries
> ########################
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> //Path to a program.
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> //Flags used by the compiler during release builds (/MD /Ob1 /Oi
> // /Ot /Oy /Gs will produce slightly less optimized but smaller
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> CMAKE_RANLIB:FILEPATH=/usr/bin/ranlib
>
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> CMAKE_SHARED_LINKER_FLAGS:STRING=
>
> //Flags used by the linker during debug builds.
> CMAKE_SHARED_LINKER_FLAGS_DEBUG:STRING=
>
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> CMAKE_VERBOSE_MAKEFILE:BOOL=OFF
>
> //Path to a library.
> COREAUDIO:FILEPATH=/System/Library/Frameworks/CoreAudio.framework
>
> //Path to a library.
> COREFOUNDATION:FILEPATH=/System/Library/Frameworks/CoreFoundation.framework
>
> //Path to a library.
> COREMIDI:FILEPATH=/System/Library/Frameworks/CoreMidi.framework
>
> //Path to a library.
> M:FILEPATH=/usr/lib/libm.dylib
>
> //Path to a library.
> PTHREAD:FILEPATH=/usr/lib/libpthread.dylib
>
> //Value Computed by CMake
> playAeolus_BINARY_DIR:STATIC=/Users/robo3/Music/MyProj/Play/PlayAeolus/bin
>
> //Value Computed by CMake
> playAeolus_SOURCE_DIR:STATIC=/Users/robo3/Music/MyProj/Play/PlayAeolus/src
>
> //Value Computed by CMake
> playsmf_BINARY_DIR:STATIC=/Users/robo3/Music/MyProj/Play/PlayAeolus/bin
>
> //Value Computed by CMake
> playsmf_SOURCE_DIR:STATIC=/Users/robo3/Music/MyProj/Play/PlayAeolus/src
>
>
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> # INTERNAL cache entries
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> CMAKE_BUILD_TOOL:INTERNAL=/usr/bin/make
> //This is the directory where this CMakeCahe.txt was created
> CMAKE_CACHEFILE_DIR:INTERNAL=/Users/robo3/Music/MyProj/Play/PlayAeolus/bin
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> //Start directory with the top level CMakeLists.txt file for this
> // project
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