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# - Try to find precompiled headers support for GCC 3.4 and 4.x
# Once done this will define:
#
# Variable:
# PCHSupport_FOUND
#
# Macro:
# ADD_PRECOMPILED_HEADER
IF(CMAKE_COMPILER_IS_GNUCXX)
EXEC_PROGRAM(
${CMAKE_CXX_COMPILER}
ARGS --version
OUTPUT_VARIABLE _compiler_output)
STRING(REGEX REPLACE ".* ([0-9]\\.[0-9]\\.[0-9]) .*" "\\1"
gcc_compiler_version ${_compiler_output})
#MESSAGE("GCC Version: ${gcc_compiler_version}")
IF(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
SET(PCHSupport_FOUND TRUE)
ELSE(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
IF(gcc_compiler_version MATCHES "3\\.4\\.[0-9]")
SET(PCHSupport_FOUND TRUE)
ENDIF(gcc_compiler_version MATCHES "3\\.4\\.[0-9]")
ENDIF(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
IF(PCHSupport_FOUND)
ADD_DEFINITIONS( -DUSE_PCH=1 )
ELSE(PCHSupport_FOUND)
ADD_DEFINITIONS( -DUSE_PCH=0 )
ENDIF(PCHSupport_FOUND)
ENDIF(CMAKE_COMPILER_IS_GNUCXX)
# ADD_PRECOMPILED_HEADER( targetName HEADERS _inputs )
MACRO(ADD_PRECOMPILED_HEADER _targetName _inputs )
FOREACH (_current_FILE ${ARGN})
GET_FILENAME_COMPONENT(_name ${_current_FILE} NAME)
SET(_source "${CMAKE_CURRENT_SOURCE_DIR}/${_current_FILE}")
SET(_outdir "${CMAKE_CURRENT_BINARY_DIR}/${_name}.gch")
MAKE_DIRECTORY(${_outdir})
SET(_output "${_outdir}/${CMAKE_BUILD_TYPE}.c++")
STRING(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" _flags_var_name)
SET(_compiler_FLAGS ${${_flags_var_name}})
GET_DIRECTORY_PROPERTY(_directory_flags INCLUDE_DIRECTORIES)
FOREACH(item ${_directory_flags})
LIST(APPEND _compiler_FLAGS "-I${item}")
ENDFOREACH(item)
GET_DIRECTORY_PROPERTY(_directory_flags DEFINITIONS)
LIST(APPEND _compiler_FLAGS ${_directory_flags})
SEPARATE_ARGUMENTS(_compiler_FLAGS)
#MESSAGE("_compiler_FLAGS: ${_compiler_FLAGS}")
#message("${CMAKE_CXX_COMPILER} ${_compiler_FLAGS} -x c++-header -o ${_output} ${_source}")
ADD_CUSTOM_COMMAND(
OUTPUT ${_output}
COMMAND ${CMAKE_CXX_COMPILER}
${_compiler_FLAGS}
-x c++-header
-o ${_output} ${_source}
DEPENDS ${_source} )
ADD_CUSTOM_TARGET(${_targetName}_gch DEPENDS ${_output})
ADD_DEPENDENCIES(${_targetName} ${_targetName}_gch)
#SET(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-include ${_name} -Winvalid-pch -H")
#SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -include ${_name} -Winvalid-pch")
SET_TARGET_PROPERTIES(${_targetName} PROPERTIES
COMPILE_FLAGS "-include ${_name} -Winvalid-pch"
)
ENDFOREACH (_current_FILE)
ENDMACRO(ADD_PRECOMPILED_HEADER)
# ADD_PRECOMPILED_HEADER_INPLACE( targetName HEADERS _inputs )
MACRO(ADD_PRECOMPILED_HEADER_INPLACE _targetName _inputs )
STRING(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" _flags_var_name)
SET(_compiler_FLAGS ${${_flags_var_name}})
GET_DIRECTORY_PROPERTY(_directory_flags INCLUDE_DIRECTORIES)
FOREACH(item ${_directory_flags})
LIST(APPEND _compiler_FLAGS "-I${item}")
ENDFOREACH(item)
GET_DIRECTORY_PROPERTY(_directory_flags DEFINITIONS)
LIST(APPEND _compiler_FLAGS ${_directory_flags})
SEPARATE_ARGUMENTS(_compiler_FLAGS)
#MESSAGE("_compiler_FLAGS: ${_compiler_FLAGS}")
MAKE_DIRECTORY("${CMAKE_CURRENT_BINARY_DIR}/gch")
FOREACH (_current_FILE ${ARGN})
GET_FILENAME_COMPONENT(_name ${_current_FILE} NAME)
SET(_source "${CMAKE_CURRENT_SOURCE_DIR}/${_current_FILE}")
SET(_output "${CMAKE_CURRENT_BINARY_DIR}/gch/${_name}.gch")
#message("${CMAKE_CXX_COMPILER} ${_compiler_FLAGS} -x c++-header -o ${_output} ${_source}")
ADD_CUSTOM_COMMAND(
OUTPUT ${_output}
COMMAND ${CMAKE_CXX_COMPILER}
${_compiler_FLAGS}
-x c++-header
-fPIC
-o ${_output} ${_source}
DEPENDS ${_source} )
LIST(APPEND GCH_FILES ${_output})
ENDFOREACH (_current_FILE)
#MESSAGE("GCH_FILES: ${GCH_FILES}")
FOREACH (GCH_FILE ${GCH_FILES})
SET_DIRECTORY_PROPERTIES( PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES ${GCH_FILE} )
ENDFOREACH (GCH_FILE)
SEPARATE_ARGUMENTS(GCH_FILES)
ADD_CUSTOM_TARGET(${_targetName}_gch DEPENDS ${GCH_FILES})
ADD_DEPENDENCIES(${_targetName} ${_targetName}_gch)
INCLUDE_DIRECTORIES(BEFORE ${CMAKE_CURRENT_BINARY_DIR}/gch/)
SET_TARGET_PROPERTIES(${_targetName} PROPERTIES COMPILE_FLAGS "-Winvalid-pch")
ENDMACRO(ADD_PRECOMPILED_HEADER_INPLACE)
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