Revision a941fb12d094efd14459043fad4e314a5f71bd08 authored by jbelvaux on 12 November 2013, 17:50:45 UTC, committed by jbelvaux on 12 November 2013, 17:50:45 UTC
1 parent 97e4bb3
precompiled_headers.cmake
#
# Christoph Heindl 2010
# Precompiled Headers Demo
# http://cheind.wordpress.com
#
# Instructs the MSVC toolset to use the precompiled header PRECOMPILED_HEADER
# for each source file given in the collection named by SOURCE_VARIABLE_NAME.
function(enable_precompiled_headers_msvc PRECOMPILED_HEADER SOURCE_VARIABLE_NAME)
if(WITH_HEADER_PRECOMP)
if(MSVC_IDE)
set(files ${${SOURCE_VARIABLE_NAME}})
# Generate precompiled header translation unit
get_filename_component(pch_basename ${PRECOMPILED_HEADER} NAME_WE)
set(pch_abs ${PRECOMPILED_HEADER})
set(pch_unity ${pch_basename}.cpp)
FILE(WRITE ${pch_unity} "// Precompiled header unity generated by CMake\n")
FILE(APPEND ${pch_unity} "#include <${pch_abs}>\n")
set_source_files_properties(${pch_unity} PROPERTIES COMPILE_FLAGS "/Yc\"${pch_abs}\"")
# Update properties of source files to use the precompiled header.
# Additionally, force the inclusion of the precompiled header at beginning of each source file.
foreach(source_file ${files} )
set_source_files_properties(
${source_file}
PROPERTIES COMPILE_FLAGS
"/Yu\"${pch_abs}\" /FI\"${pch_abs}\""
)
endforeach(source_file)
# Finally, update the source file collection to contain the precompiled header translation unit
set(${SOURCE_VARIABLE_NAME} ${${SOURCE_VARIABLE_NAME}} ${pch_unity} PARENT_SCOPE)
endif(MSVC_IDE)
endif(WITH_HEADER_PRECOMP)
endfunction(enable_precompiled_headers_msvc)
function(enable_precompiled_headers_GCC PRECOMPILED_HEADER TARGET_NAME)
if(WITH_HEADER_PRECOMP)
#ne marche pas avec Clang
#if (CMAKE_COMPILER_IS_GNUCXX OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
IF(CMAKE_COMPILER_IS_GNUCXX)
GET_FILENAME_COMPONENT(_name ${PRECOMPILED_HEADER} NAME)
#SET(_source "${CMAKE_CURRENT_SOURCE_DIR}/${PRECOMPILED_HEADER}")
SET(_source "${PROJECT_SOURCE_DIR}/include/${PRECOMPILED_HEADER}")
#SET(_outdir "${CMAKE_CURRENT_SOURCE_DIR}/${_name}.gch")
SET(_outdir "${PROJECT_SOURCE_DIR}/include/${_name}.gch")
MAKE_DIRECTORY(${_outdir})
SET(_output "${_outdir}/.c++")
STRING(TOUPPER "CMAKE_CXX_FLAGS_${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 ${_directory_flags})
SEPARATE_ARGUMENTS(_compiler_FLAGS)
#MESSAGE("${CMAKE_CXX_COMPILER} -DPCHCOMPILE ${_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} IMPLICIT_DEPENDS CXX ${_source})
ADD_CUSTOM_TARGET(${TARGET_NAME}_gch DEPENDS ${_output})
ADD_DEPENDENCIES(${TARGET_NAME} ${TARGET_NAME}_gch)
SET_TARGET_PROPERTIES(${TARGET_NAME}_gch PROPERTIES COMPILE_FLAGS "-include ${_name} -Winvalid-pch")
ENDIF(CMAKE_COMPILER_IS_GNUCXX)
endif(WITH_HEADER_PRECOMP)
endfunction(enable_precompiled_headers_GCC)
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