if(CMAKE_SYSTEM_NAME STREQUAL "Windows") set(CMAKE_PREFIX_PATH "${WINDOWS_LIBRARIES}/glew-2.1.0") find_package(GLEW REQUIRED) set(GLEW_LIB ${GLEW_STATIC_LIBRARY_RELEASE} opengl32.lib CACHE STRING "Path to PortAudio includes") else() find_package(GLEW REQUIRED) set(GLEW_LIB ${GLEW_LIBRARIES} GL CACHE STRING "Path to PortAudio includes") endif()