[CMake] Setting compile defs with: Cuda, add_subdirectory, and set_target_properties (COMPILE_DEFINITIONS)

[Brian Davis]

I have a macro which gets called to create cuda and matlab mex enabled
libraries and apps.  I call this macro **twice from within a single
directory** to create 2 libraries.  Problem is that I desire to set compiler
defines -DWHATEVER=goop etc differently for each lib (for each of the two in
question).  For instance -DCPU_RECON=yes for cpu library and -DGPU_RECON=yes
for gpu library which rely on the same source code in the same directory:


-- snip - the macro --
macro( add_gpu_matlab_mex_library LIB_NAME )

    PARSE_CMAKE_ARGUMENTS(ARG
        "SRCDIRS;CPP_SOURCES;CU_SOURCES;LINK_LIBS;DEFINES" ""
        ${ARGN}
    )

        foreach( DEFINE_STR ${ARG_DEFINES} )
            message( "DEFINE_STR = ${DEFINE_STR}" )
            add_definitions( -D${DEFINE_STR} )
        endforeach()
...
...

    if(DEFINED ARG_CU_SOURCES )
        message( "ARG_CU_SOURCES is defined as = ${ARG_CU_SOURCES}" )
        CUDA_ADD_LIBRARY( ${MATLAB_CUDA_MEX_NAME} SHARED
${MATLAB_CUDA_FILES} )
    else()
        message( "ARG_CU_SOURCES is not defined" )
       ADD_LIBRARY( ${MATLAB_CUDA_MEX_NAME} SHARED ${MATLAB_CUDA_FILES} )
    endif()
...
...
    SET_TARGET_PROPERTIES( ${MATLAB_CUDA_MEX_NAME} PROPERTIES
      SUFFIX .mexw64
       LINKER_LANGUAGE CXX
       COMPILE_DEFINITIONS -DMY_DEFINE=DEFINE_THIS_GOOP
      LINK_FLAGS /export:mexFunction
      )
...
...
endmacro()

--end snip--

An example of using this macro in my CMakeLists.txt file


--snip--
add_gpu_matlab_mex_library(
    gpuPMatrixRecon
    CPP_SOURCES
        gpuPMatrixRecon.cpp
        CUDADeviceProperties.cpp
#    LINK_LIBS dvipGPUCUDAUtil
    CU_SOURCES  gpuPMatrixRecon.cu
    DEFINES CUDADeviceProperties_DLLExport=yes GPU_RECON=yes
)

add_gpu_matlab_mex_library(
    cpuPMatrixRecon
    CPP_SOURCES
        gpuPMatrixRecon.cpp
        CUDADeviceProperties.cpp
#    LINK_LIBS dvipGPUCUDAUtil
    CU_SOURCES  gpuPMatrixRecon.cu
    DEFINES CUDADeviceProperties_DLLExport=yes CPU_RECON=yes
#    DEFINES CUDADeviceProperties_DLLExport=yes


--end snip--

Both are being compiled as a cuda library as each contains the .cu file even
though in the cpu version the cuda code is #ifdef'ed out ... at least it
should be if I could get this to work.

Problem comes is that using add_definitions causes the defines to be the
same for each library and using set_target_properties seems to have no
effect.

--snip cpu version compile output--
2>C:/CUDA/bin64/nvcc.exe
C:/projects/NIH2009/source/branches/trunk/source/Matlab/lib/3rdParty/Siemens/gpu/PMatrixRecon/gpuPMatrixRecon.cu
-arch sm_11 --ptxas-options=-v -maxrregcount=32 -Xcompiler
/EHsc,/W3,/nologo,/Od,/Zi,/MTd -m64 -DCUDADeviceProperties_DLLExport=yes
-DGPU_RECON=yes -DgpuPMatrixRecon_EXPORTS -ccbin "c:/Program
--end snip --

--snip gpu version compile output--
2>C:/CUDA/bin64/nvcc.exe
C:/projects/NIH2009/source/branches/trunk/source/Matlab/lib/3rdParty/Siemens/gpu/PMatrixRecon/gpuPMatrixRecon.cu
-arch sm_11 --ptxas-options=-v -maxrregcount=32 -Xcompiler
/EHsc,/W3,/nologo,/Od,/Zi,/MTd -m64 -DCUDADeviceProperties_DLLExport=yes
-DGPU_RECON=yes -DgpuPMatrixRecon_EXPORTS -ccbin "c:/Program
--end snip--

These are strangely... the same.

set_target_properties should work for a cuda library right?

add_definitions is directory global, but I can't figure out why I do not see
both definitions (-DGPU_RECON=yes and -DCPU_RECON=yes) in each library.  I
only see the first in the VS project for cpu version and gpu versions.  I
also do not understand why I do not see  -DMY_DEFINE=DEFINE_THIS_GOOP from
set_target_properties in either project.
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