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FUNCTION(GET_COMMON_PCH_PARAMS PCH_HEADER PCH_FE INCLUDE_PREFIX)
GET_FILENAME_COMPONENT(PCH_HEADER_N ${PCH_HEADER} NAME)
GET_DIRECTORY_PROPERTY(TARGET_INCLUDES INCLUDE_DIRECTORIES)
FOREACH(ITEM ${TARGET_INCLUDES})
LIST(APPEND INCLUDE_FLAGS_LIST "${INCLUDE_PREFIX}\"${ITEM}\" ")
ENDFOREACH(ITEM)
SET(PCH_HEADER_NAME ${PCH_HEADER_N} PARENT_SCOPE)
SET(PCH_HEADER_OUT ${CMAKE_CURRENT_BINARY_DIR}/${PCH_HEADER_N}.${PCH_FE} PARENT_SCOPE)
SET(INCLUDE_FLAGS ${INCLUDE_FLAGS_LIST} PARENT_SCOPE)
ENDFUNCTION(GET_COMMON_PCH_PARAMS)
FUNCTION(GENERATE_CXX_PCH_COMMAND TARGET_NAME INCLUDE_FLAGS IN PCH_SRC OUT)
IF (CMAKE_BUILD_TYPE)
STRING(TOUPPER _${CMAKE_BUILD_TYPE} CURRENT_BUILD_TYPE)
ENDIF ()
SET(COMPILE_FLAGS ${CMAKE_CXX_FLAGS${CURRENT_BUILD_TYPE}})
LIST(APPEND COMPILE_FLAGS ${CMAKE_CXX_FLAGS})
IF ("${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
IF (NOT "${CMAKE_OSX_ARCHITECTURES}" STREQUAL "")
LIST(APPEND COMPILE_FLAGS "-arch ${CMAKE_OSX_ARCHITECTURES}")
ENDIF ()
IF (NOT "${CMAKE_OSX_SYSROOT}" STREQUAL "")
LIST(APPEND COMPILE_FLAGS "-isysroot ${CMAKE_OSX_SYSROOT}")
ENDIF ()
IF (NOT "${CMAKE_OSX_DEPLOYMENT_TARGET}" STREQUAL "")
LIST(APPEND COMPILE_FLAGS "-mmacosx-version-min=${CMAKE_OSX_DEPLOYMENT_TARGET}")
ENDIF ()
ENDIF ()
GET_DIRECTORY_PROPERTY(TARGET_DEFINITIONS COMPILE_DEFINITIONS)
FOREACH(ITEM ${TARGET_DEFINITIONS})
LIST(APPEND DEFINITION_FLAGS "-D${ITEM} ")
ENDFOREACH(ITEM)
SEPARATE_ARGUMENTS(COMPILE_FLAGS)
SEPARATE_ARGUMENTS(INCLUDE_FLAGS)
SEPARATE_ARGUMENTS(DEFINITION_FLAGS)
GET_FILENAME_COMPONENT(PCH_SRC_N ${PCH_SRC} NAME)
ADD_LIBRARY(${PCH_SRC_N}_dephelp MODULE ${PCH_SRC})
ADD_CUSTOM_COMMAND(
OUTPUT ${OUT}
COMMAND ${CMAKE_CXX_COMPILER}
ARGS ${DEFINITION_FLAGS} ${COMPILE_FLAGS} ${INCLUDE_FLAGS} -x c++-header ${IN} -o ${OUT}
DEPENDS ${IN} ${PCH_SRC_N}_dephelp
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
)
ADD_CUSTOM_TARGET(generate_${PCH_SRC_N}
DEPENDS ${OUT}
)
ADD_DEPENDENCIES(${TARGET_NAME} generate_${PCH_SRC_N})
ENDFUNCTION(GENERATE_CXX_PCH_COMMAND)
FUNCTION(ADD_CXX_PCH_GCC TARGET_NAME PCH_HEADER PCH_SOURCE)
GET_COMMON_PCH_PARAMS(${PCH_HEADER} "gch" "-I")
GENERATE_CXX_PCH_COMMAND(${TARGET_NAME} "${INCLUDE_FLAGS}" ${PCH_HEADER} ${PCH_SOURCE} ${PCH_HEADER_OUT})
SET_TARGET_PROPERTIES(
${TARGET_NAME} PROPERTIES
COMPILE_FLAGS "-include ${CMAKE_CURRENT_BINARY_DIR}/${PCH_HEADER_NAME}"
)
ENDFUNCTION(ADD_CXX_PCH_GCC)
FUNCTION(ADD_CXX_PCH_CLANG TARGET_NAME PCH_HEADER PCH_SOURCE)
GET_COMMON_PCH_PARAMS(${PCH_HEADER} "pch" "-I")
GENERATE_CXX_PCH_COMMAND(${TARGET_NAME} "${INCLUDE_FLAGS}" ${PCH_HEADER} ${PCH_SOURCE} ${PCH_HEADER_OUT})
SET_TARGET_PROPERTIES(
${TARGET_NAME} PROPERTIES
COMPILE_FLAGS "-include-pch ${PCH_HEADER_OUT}"
)
ENDFUNCTION(ADD_CXX_PCH_CLANG)
FUNCTION(ADD_CXX_PCH_MSVC TARGET_NAME PCH_HEADER PCH_SOURCE)
GET_COMMON_PCH_PARAMS(${PCH_HEADER} "pch" "/I")
SET_TARGET_PROPERTIES(
${TARGET_NAME} PROPERTIES
COMPILE_FLAGS "/FI${PCH_HEADER_NAME} /Yu${PCH_HEADER_NAME}"
)
SET_SOURCE_FILES_PROPERTIES(
${PCH_SOURCE} PROPERTIES
COMPILE_FLAGS "/Yc${PCH_HEADER_NAME}"
)
ENDFUNCTION(ADD_CXX_PCH_MSVC)
FUNCTION(ADD_CXX_PCH TARGET_NAME PCH_HEADER PCH_SOURCE)
IF (MSVC)
ADD_CXX_PCH_MSVC(${TARGET_NAME} ${PCH_HEADER} ${PCH_SOURCE})
ELSEIF ("${CMAKE_GENERATOR}" MATCHES "Xcode")
SET_TARGET_PROPERTIES(${TARGET_NAME} PROPERTIES
XCODE_ATTRIBUTE_GCC_PRECOMPILE_PREFIX_HEADER YES
XCODE_ATTRIBUTE_GCC_PREFIX_HEADER "${CMAKE_CURRENT_SOURCE_DIR}/${PCH_HEADER}"
)
ELSEIF ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
ADD_CXX_PCH_CLANG(${TARGET_NAME} ${PCH_HEADER} ${PCH_SOURCE})
ELSEIF ("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
ADD_CXX_PCH_GCC(${TARGET_NAME} ${PCH_HEADER} ${PCH_SOURCE})
ENDIF ()
ENDFUNCTION(ADD_CXX_PCH)
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