gistfile1.cmake

if(CMAKE_COMPILER_IS_GNUCC)
    message(STATUS "Compiler is GCC; using precompiled header")
    get_directory_property(_INCLUDE_DIRS INCLUDE_DIRECTORIES)
    set(_CXX_FLAGS ${CMAKE_CXX_FLAGS})
    foreach(DIR ${_INCLUDE_DIRS})
        set(_CXX_FLAGS ${_CXX_FLAGS} -I"${DIR}")
    endforeach()
    separate_arguments(_CXX_FLAGS)
    add_custom_command(
        OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/src/lib/precompiled.h.gch
        COMMAND ${CMAKE_CXX_COMPILER} ${_CXX_FLAGS} ${CMAKE_CURRENT_SOURCE_DIR}/src/lib/precompiled.h
        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/src/lib/precompiled.h
    )
    add_custom_target(precompiled DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/src/lib/precompiled.h.gch)
endif()