if(NOT IS_MSVC)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
endif()

add_definitions("-DSIFTGPU_NO_DEVIL")
# OpenGL
find_package(OpenGL REQUIRED)
 
# GLUT
find_package(GLUT REQUIRED)
 
# Glew
find_package(GLEW REQUIRED)

find_package(CUDA REQUIRED)

set(SIFT_GPU_SOURCE_FILES
    FrameBufferObject.cpp
    FrameBufferObject.h
    GlobalUtil.cpp
    GlobalUtil.h
    GLTexImage.cpp
    GLTexImage.h
    ProgramGLSL.cpp
    ProgramGLSL.h
    ProgramGPU.h
    PyramidGL.cpp
    PyramidGL.h
    ShaderMan.cpp
    ShaderMan.h
    SiftGPU.cpp
    SiftGPU.h
    SiftMatch.cpp
    SiftMatch.h
    SiftPyramid.cpp
    SiftPyramid.h
)
find_package(CUDA)
if(CUDA_FOUND)

    add_definitions("-DCUDA_SIFTGPU_ENABLED")
    # Fix for Ubuntu 16.04.
    add_definitions("-D_FORCE_INLINES")

    set(SIFT_GPU_SOURCE_FILES
        ${SIFT_GPU_SOURCE_FILES}
        CuTexImage.cpp
        CuTexImage.h
        ProgramCU.cu
        ProgramCU.h
        PyramidCU.cpp
        PyramidCU.h
        SiftMatchCU.cpp
        SiftMatchCU.h
    )

    cuda_add_library(sift_gpu SHARED ${SIFT_GPU_SOURCE_FILES})
else()
    infrascal_library(sift_gpu SHARED ${SIFT_GPU_SOURCE_FILES})
endif()

target_link_libraries(sift_gpu
    ${SIFT_GPU_LIBRARIES}
    ${GLEW_LIBRARIES}
    ${GLUT_LIBRARIES} 
    ${OPENGL_LIBRARIES}
)