Am Montag, den 18.12.2006, 13:33 +0100 schrieb Maik Beckmann:
>
Even more intelligent ;)
Maik
# - 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]")
ENDIF(CMAKE_COMPILER_IS_GNUCXX)
MACRO(ADD_PRECOMPILED_HEADER _targetName _input )
IF(NOT CMAKE_BUILD_TYPE)
MESSAGE(FATAL_ERROR
"This is the ADD_PRECOMPILED_HEADER macro. "
"You must set CMAKE_BUILD_TYPE!"
)
ENDIF(NOT CMAKE_BUILD_TYPE)
GET_FILENAME_COMPONENT(_name ${_input} NAME)
GET_FILENAME_COMPONENT(_path ${_input} PATH)
SET(_outdir "${CMAKE_CURRENT_BINARY_DIR}/${_name}.gch")
SET(_output "${_outdir}/${CMAKE_BUILD_TYPE}.c++")
ADD_CUSTOM_COMMAND(
OUTPUT ${_outdir}
COMMAND mkdir ${_outdir} # TODO: {CMAKE_COMMAND} -E ...
)
#MAKE_DIRECTORY(${_outdir})
STRING(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" _flags_var_name)
SET(_compile_FLAGS ${${_flags_var_name}})
GET_DIRECTORY_PROPERTY(_directory_flags INCLUDE_DIRECTORIES)
SET(_CMAKE_CURRENT_BINARY_DIR_included_before_path FALSE)
FOREACH(item ${_directory_flags})
IF(${item} STREQUAL ${_path} AND NOT
_CMAKE_CURRENT_BINARY_DIR_included_before_path )
MESSAGE(FATAL_ERROR
"This is the ADD_PRECOMPILED_HEADER macro. "
"CMAKE_CURREN_BINARY_DIR has to mentioned at
INCLUDE_DIRECTORIES's argument list before ${_path}, where ${_name} is located"
)
ENDIF(${item} STREQUAL ${_path} AND NOT
_CMAKE_CURRENT_BINARY_DIR_included_before_path )
IF(${item} STREQUAL ${CMAKE_CURRENT_BINARY_DIR})
SET(_CMAKE_CURRENT_BINARY_DIR_included_before_path TRUE)
ENDIF(${item} STREQUAL ${CMAKE_CURRENT_BINARY_DIR})
LIST(APPEND _compile_FLAGS "-I${item}")
ENDFOREACH(item)
GET_DIRECTORY_PROPERTY(_directory_flags DEFINITIONS)
LIST(APPEND _compile_FLAGS ${_directory_flags})
SEPARATE_ARGUMENTS(_compile_FLAGS)
#MESSAGE("_compiler_FLAGS: ${_compiler_FLAGS}")
#message("COMMAND ${CMAKE_CXX_COMPILER} ${_compile_FLAGS} -x c++-header
-o ${_output} ${_input}")
ADD_CUSTOM_COMMAND(
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${_name}
COMMAND ${CMAKE_COMMAND} -E copy ${_input}
${CMAKE_CURRENT_BINARY_DIR}/${_name} # ensure same directory! Required by gcc
)
ADD_CUSTOM_COMMAND(
OUTPUT ${_output}
COMMAND ${CMAKE_CXX_COMPILER}
${_compile_FLAGS}
-x c++-header
-o ${_output}
${_input}
DEPENDS ${_input} ${_outdir} ${CMAKE_CURRENT_BINARY_DIR}/${_name}
)
ADD_CUSTOM_TARGET(${_targetName}_gch
DEPENDS ${_output}
)
ADD_DEPENDENCIES(${_targetName} ${_targetName}_gch )
SET_TARGET_PROPERTIES(${_targetName}
PROPERTIES
COMPILE_FLAGS "-include ${_name} -Winvalid-pch"
)
ENDMACRO(ADD_PRECOMPILED_HEADER)
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