--- /dev/null
+# taken from http://www.vtk.org/Bug/view.php?id=1260 and slightly adjusted
+
+# - 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 _targetName _input _dowarn
+# ADD_PRECOMPILED_HEADER_TO_TARGET _targetName _input _pch_output_to_use _dowarn
+# ADD_NATIVE_PRECOMPILED_HEADER _targetName _input _dowarn
+# GET_NATIVE_PRECOMPILED_HEADER _targetName _input
+
+IF(CMAKE_COMPILER_IS_GNUCXX)
+
+ EXEC_PROGRAM(
+ ${CMAKE_CXX_COMPILER}
+ ARGS ${CMAKE_CXX_COMPILER_ARG1} -dumpversion
+ OUTPUT_VARIABLE gcc_compiler_version)
+ #MESSAGE("GCC Version: ${gcc_compiler_version}")
+ IF(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
+ SET(PCHSupport_FOUND TRUE)
+ ELSE(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
+ IF(gcc_compiler_version MATCHES "3\\.4\\.[0-9]")
+ SET(PCHSupport_FOUND TRUE)
+ ENDIF(gcc_compiler_version MATCHES "3\\.4\\.[0-9]")
+ ENDIF(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
+
+ SET(_PCH_include_prefix "-I")
+
+ELSE(CMAKE_COMPILER_IS_GNUCXX)
+ IF(WIN32)
+ SET(PCHSupport_FOUND TRUE) # for experimental msvc support
+ SET(_PCH_include_prefix "/I")
+ ELSE(WIN32)
+ SET(PCHSupport_FOUND FALSE)
+ ENDIF(WIN32)
+ENDIF(CMAKE_COMPILER_IS_GNUCXX)
+
+
+MACRO(_PCH_GET_COMPILE_FLAGS _out_compile_flags)
+
+
+ STRING(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" _flags_var_name)
+ SET(${_out_compile_flags} ${${_flags_var_name}} )
+
+ IF(CMAKE_COMPILER_IS_GNUCXX)
+
+ GET_TARGET_PROPERTY(_targetType ${_PCH_current_target} TYPE)
+ IF(${_targetType} STREQUAL SHARED_LIBRARY AND NOT WIN32)
+ LIST(APPEND ${_out_compile_flags} "${${_out_compile_flags}} -fPIC")
+ ENDIF()
+
+ ELSE(CMAKE_COMPILER_IS_GNUCXX)
+ ## TODO ... ? or does it work out of the box
+ ENDIF(CMAKE_COMPILER_IS_GNUCXX)
+
+ GET_DIRECTORY_PROPERTY(DIRINC INCLUDE_DIRECTORIES )
+ FOREACH(item ${DIRINC})
+ LIST(APPEND ${_out_compile_flags} "${_PCH_include_prefix}${item}")
+ ENDFOREACH(item)
+
+ GET_DIRECTORY_PROPERTY(_directory_flags DEFINITIONS)
+ GET_DIRECTORY_PROPERTY(_global_definitions DIRECTORY ${CMAKE_SOURCE_DIR} DEFINITIONS)
+ #MESSAGE("_directory_flags ${_directory_flags} ${_global_definitions}" )
+ LIST(APPEND ${_out_compile_flags} ${_directory_flags})
+ LIST(APPEND ${_out_compile_flags} ${_global_definitions})
+ LIST(APPEND ${_out_compile_flags} ${CMAKE_CXX_FLAGS} )
+
+ SEPARATE_ARGUMENTS(${_out_compile_flags})
+
+ENDMACRO(_PCH_GET_COMPILE_FLAGS)
+
+
+MACRO(_PCH_WRITE_PCHDEP_CXX _targetName _include_file _dephelp)
+
+ SET(${_dephelp} ${CMAKE_CURRENT_BINARY_DIR}/${_targetName}_pch_dephelp.cxx)
+ FILE(WRITE ${${_dephelp}}
+"#include \"${_include_file}\"
+int testfunction()
+{
+ return 0;
+}
+"
+ )
+
+ENDMACRO(_PCH_WRITE_PCHDEP_CXX )
+
+MACRO(_PCH_GET_COMPILE_COMMAND out_command _input _output)
+
+ FILE(TO_NATIVE_PATH ${_input} _native_input)
+ FILE(TO_NATIVE_PATH ${_output} _native_output)
+
+
+ IF(CMAKE_COMPILER_IS_GNUCXX)
+ IF(CMAKE_CXX_COMPILER_ARG1)
+ # remove leading space in compiler argument
+ STRING(REGEX REPLACE "^ +" "" pchsupport_compiler_cxx_arg1 ${CMAKE_CXX_COMPILER_ARG1})
+
+ SET(${out_command}
+ ${CMAKE_CXX_COMPILER} ${pchsupport_compiler_cxx_arg1} ${_compile_FLAGS} -x c++-header -o ${_output} ${_input}
+ )
+ ELSE(CMAKE_CXX_COMPILER_ARG1)
+ SET(${out_command}
+ ${CMAKE_CXX_COMPILER} ${_compile_FLAGS} -x c++-header -o ${_output} ${_input}
+ )
+ ENDIF(CMAKE_CXX_COMPILER_ARG1)
+ ELSE(CMAKE_COMPILER_IS_GNUCXX)
+
+ SET(_dummy_str "#include <${_input}>")
+ FILE(WRITE ${CMAKE_CURRENT_BINARY_DIR}/pch_dummy.cpp ${_dummy_str})
+
+ SET(${out_command}
+ ${CMAKE_CXX_COMPILER} ${_compile_FLAGS} /c /Fp${_native_output} /Yc${_native_input} pch_dummy.cpp
+ )
+ #/out:${_output}
+
+ ENDIF(CMAKE_COMPILER_IS_GNUCXX)
+
+ENDMACRO(_PCH_GET_COMPILE_COMMAND )
+
+
+
+MACRO(_PCH_GET_TARGET_COMPILE_FLAGS _cflags _header_name _pch_path _dowarn )
+
+ FILE(TO_NATIVE_PATH ${_pch_path} _native_pch_path)
+
+ IF(CMAKE_COMPILER_IS_GNUCXX)
+ # for use with distcc and gcc >4.0.1 if preprocessed files are accessible
+ # on all remote machines set
+ # PCH_ADDITIONAL_COMPILER_FLAGS to -fpch-preprocess
+ # if you want warnings for invalid header files (which is very inconvenient
+ # if you have different versions of the headers for different build types
+ # you may set _pch_dowarn
+ IF (_dowarn)
+ SET(${_cflags} "${PCH_ADDITIONAL_COMPILER_FLAGS} -include ${CMAKE_CURRENT_BINARY_DIR}/${_header_name} -Winvalid-pch " )
+ ELSE (_dowarn)
+ SET(${_cflags} "${PCH_ADDITIONAL_COMPILER_FLAGS} -include ${CMAKE_CURRENT_BINARY_DIR}/${_header_name} " )
+ ENDIF (_dowarn)
+ ELSE(CMAKE_COMPILER_IS_GNUCXX)
+
+ set(${_cflags} "/Fp${_native_pch_path} /Yu${_header_name}" )
+
+ ENDIF(CMAKE_COMPILER_IS_GNUCXX)
+
+ENDMACRO(_PCH_GET_TARGET_COMPILE_FLAGS )
+
+MACRO(GET_PRECOMPILED_HEADER_OUTPUT _targetName _input _output)
+ GET_FILENAME_COMPONENT(_name ${_input} NAME)
+ GET_FILENAME_COMPONENT(_path ${_input} PATH)
+ SET(_output "${CMAKE_CURRENT_BINARY_DIR}/${_name}.gch/${_targetName}_${CMAKE_BUILD_TYPE}.gch")
+ENDMACRO(GET_PRECOMPILED_HEADER_OUTPUT _targetName _input)
+
+
+MACRO(ADD_PRECOMPILED_HEADER_TO_TARGET _targetName _input _pch_output_to_use )
+
+ # to do: test whether compiler flags match between target _targetName
+ # and _pch_output_to_use
+ GET_FILENAME_COMPONENT(_name ${_input} NAME)
+
+ IF( "${ARGN}" STREQUAL "0")
+ SET(_dowarn 0)
+ ELSE( "${ARGN}" STREQUAL "0")
+ SET(_dowarn 1)
+ ENDIF("${ARGN}" STREQUAL "0")
+
+
+ _PCH_GET_TARGET_COMPILE_FLAGS(_target_cflags ${_name} ${_pch_output_to_use} ${_dowarn})
+ # MESSAGE("Add flags ${_target_cflags} to ${_targetName} " )
+ SET_TARGET_PROPERTIES(${_targetName}
+ PROPERTIES
+ COMPILE_FLAGS ${_target_cflags}
+ )
+
+ ADD_CUSTOM_TARGET(pch_Generate_${_targetName}
+ DEPENDS ${_pch_output_to_use}
+ )
+
+ ADD_DEPENDENCIES(${_targetName} pch_Generate_${_targetName} )
+
+ENDMACRO(ADD_PRECOMPILED_HEADER_TO_TARGET)
+
+MACRO(ADD_PRECOMPILED_HEADER _targetName _input)
+
+ SET(_PCH_current_target ${_targetName})
+
+ IF(NOT CMAKE_BUILD_TYPE)
+ MESSAGE(FATAL_ERROR
+ "This is the ADD_PRECOMPILED_HEADER macro. "
+ "You must set CMAKE_BUILD_TYPE!"
+ )
+ ENDIF(NOT CMAKE_BUILD_TYPE)
+
+ IF( "${ARGN}" STREQUAL "0")
+ SET(_dowarn 0)
+ ELSE( "${ARGN}" STREQUAL "0")
+ SET(_dowarn 1)
+ ENDIF("${ARGN}" STREQUAL "0")
+
+
+ GET_FILENAME_COMPONENT(_name ${_input} NAME)
+ GET_FILENAME_COMPONENT(_path ${_input} PATH)
+ GET_PRECOMPILED_HEADER_OUTPUT( ${_targetName} ${_input} _output)
+
+ GET_FILENAME_COMPONENT(_outdir ${_output} PATH )
+
+ GET_TARGET_PROPERTY(_targetType ${_PCH_current_target} TYPE)
+ _PCH_WRITE_PCHDEP_CXX(${_targetName} ${_input} _pch_dephelp_cxx)
+
+ IF(${_targetType} STREQUAL SHARED_LIBRARY)
+ ADD_LIBRARY(${_targetName}_pch_dephelp STATIC ${_pch_dephelp_cxx} )
+ ELSE(${_targetType} STREQUAL SHARED_LIBRARY)
+ ADD_LIBRARY(${_targetName}_pch_dephelp STATIC ${_pch_dephelp_cxx})
+ ENDIF(${_targetType} STREQUAL SHARED_LIBRARY)
+
+ FILE(MAKE_DIRECTORY ${_outdir})
+
+
+ _PCH_GET_COMPILE_FLAGS(_compile_FLAGS)
+
+ #MESSAGE("_compile_FLAGS: ${_compile_FLAGS}")
+ #message("COMMAND ${CMAKE_CXX_COMPILER} ${_compile_FLAGS} -x c++-header -o ${_output} ${_input}")
+ SET_SOURCE_FILES_PROPERTIES(${CMAKE_CURRENT_BINARY_DIR}/${_name} PROPERTIES GENERATED 1)
+ 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
+ DEPENDS ${_input}
+ )
+
+ #message("_command ${_input} ${_output}")
+ _PCH_GET_COMPILE_COMMAND(_command ${CMAKE_CURRENT_BINARY_DIR}/${_name} ${_output} )
+
+ #message(${_input} )
+ #message("_output ${_output}")
+
+ ADD_CUSTOM_COMMAND(
+ OUTPUT ${_output}
+ COMMAND ${_command}
+ DEPENDS ${_input} ${CMAKE_CURRENT_BINARY_DIR}/${_name} ${_targetName}_pch_dephelp
+ )
+
+
+ ADD_PRECOMPILED_HEADER_TO_TARGET(${_targetName} ${_input} ${_output} ${_dowarn})
+ENDMACRO(ADD_PRECOMPILED_HEADER)
+
+
+# Generates the use of precompiled in a target,
+# without using depency targets (2 extra for each target)
+# Using Visual, must also add ${_targetName}_pch to sources
+# Not needed by Xcode
+
+MACRO(GET_NATIVE_PRECOMPILED_HEADER _targetName _input)
+
+ if(CMAKE_GENERATOR MATCHES Visual*)
+
+ SET(_dummy_str "#include \"${_input}\"\n"
+ "// This is required to suppress LNK4221. Very annoying.\n"
+ "void *g_${_targetName}Dummy = 0\;\n")
+
+ # Use of cxx extension for generated files (as Qt does)
+ SET(${_targetName}_pch ${CMAKE_CURRENT_BINARY_DIR}/${_targetName}_pch.cxx)
+ if(EXISTS ${${_targetName}_pch})
+ # Check if contents is the same, if not rewrite
+ # todo
+ else(EXISTS ${${_targetName}_pch})
+ FILE(WRITE ${${_targetName}_pch} ${_dummy_str})
+ endif(EXISTS ${${_targetName}_pch})
+ endif(CMAKE_GENERATOR MATCHES Visual*)
+
+ENDMACRO(GET_NATIVE_PRECOMPILED_HEADER)
+
+
+MACRO(ADD_NATIVE_PRECOMPILED_HEADER _targetName _input)
+
+ IF( "${ARGN}" STREQUAL "0")
+ SET(_dowarn 0)
+ ELSE( "${ARGN}" STREQUAL "0")
+ SET(_dowarn 1)
+ ENDIF("${ARGN}" STREQUAL "0")
+
+ if(CMAKE_GENERATOR MATCHES Visual*)
+ # Auto include the precompile (useful for moc processing, since the use of
+ # precompiled is specified at the target level
+ # and I don't want to specifiy /F- for each moc/res/ui generated files (using Qt)
+
+ GET_TARGET_PROPERTY(oldProps ${_targetName} COMPILE_FLAGS)
+ if (${oldProps} MATCHES NOTFOUND)
+ SET(oldProps "")
+ endif(${oldProps} MATCHES NOTFOUND)
+
+ SET(newProperties "${oldProps} /Yu\"${_input}\" /FI\"${_input}\"")
+ SET_TARGET_PROPERTIES(${_targetName} PROPERTIES COMPILE_FLAGS "${newProperties}")
+
+ #also inlude ${oldProps} to have the same compile options
+ SET_SOURCE_FILES_PROPERTIES(${${_targetName}_pch} PROPERTIES COMPILE_FLAGS "${oldProps} /Yc\"${_input}\"")
+
+ else(CMAKE_GENERATOR MATCHES Visual*)
+
+ if (CMAKE_GENERATOR MATCHES Xcode)
+ # For Xcode, cmake needs my patch to process
+ # GCC_PREFIX_HEADER and GCC_PRECOMPILE_PREFIX_HEADER as target properties
+
+ GET_TARGET_PROPERTY(oldProps ${_targetName} COMPILE_FLAGS)
+ if (${oldProps} MATCHES NOTFOUND)
+ SET(oldProps "")
+ endif(${oldProps} MATCHES NOTFOUND)
+
+ # When buiding out of the tree, precompiled may not be located
+ # Use full path instead.
+ GET_FILENAME_COMPONENT(fullPath ${_input} ABSOLUTE)
+
+ SET_TARGET_PROPERTIES(${_targetName} PROPERTIES XCODE_ATTRIBUTE_GCC_PREFIX_HEADER "${fullPath}")
+ SET_TARGET_PROPERTIES(${_targetName} PROPERTIES XCODE_ATTRIBUTE_GCC_PRECOMPILE_PREFIX_HEADER "YES")
+
+ else (CMAKE_GENERATOR MATCHES Xcode)
+
+ #Fallback to the "old" precompiled suppport
+ #ADD_PRECOMPILED_HEADER(${_targetName} ${_input} ${_dowarn})
+ endif(CMAKE_GENERATOR MATCHES Xcode)
+ endif(CMAKE_GENERATOR MATCHES Visual*)
+
+ENDMACRO(ADD_NATIVE_PRECOMPILED_HEADER)
projects / opencv / blobdiff