1# taken from http://public.kitware.com/Bug/view.php?id=1260 and slightly adjusted 2 3# - Try to find precompiled headers support for GCC 3.4 and 4.x 4# Once done this will define: 5# 6# Variable: 7# PCHSupport_FOUND 8# 9# Macro: 10# ADD_PRECOMPILED_HEADER _targetName _input _dowarn 11# ADD_PRECOMPILED_HEADER_TO_TARGET _targetName _input _pch_output_to_use _dowarn 12# ADD_NATIVE_PRECOMPILED_HEADER _targetName _input _dowarn 13# GET_NATIVE_PRECOMPILED_HEADER _targetName _input 14 15IF(CMAKE_COMPILER_IS_GNUCXX) 16 17 EXEC_PROGRAM( 18 ${CMAKE_CXX_COMPILER} 19 ARGS ${CMAKE_CXX_COMPILER_ARG1} -dumpversion 20 OUTPUT_VARIABLE gcc_compiler_version) 21 #MESSAGE("GCC Version: ${gcc_compiler_version}") 22 IF(gcc_compiler_version VERSION_GREATER "4.2.-1") 23 SET(PCHSupport_FOUND TRUE) 24 ENDIF() 25 26 SET(_PCH_include_prefix "-I") 27 SET(_PCH_isystem_prefix "-isystem") 28 SET(_PCH_define_prefix "-D") 29 30ELSEIF(CMAKE_GENERATOR MATCHES "^Visual.*$") 31 SET(PCHSupport_FOUND TRUE) 32 SET(_PCH_include_prefix "/I") 33 SET(_PCH_isystem_prefix "/I") 34 SET(_PCH_define_prefix "/D") 35ELSE() 36 SET(PCHSupport_FOUND FALSE) 37ENDIF() 38 39MACRO(_PCH_GET_COMPILE_FLAGS _out_compile_flags) 40 41 STRING(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" _flags_var_name) 42 SET(${_out_compile_flags} ${${_flags_var_name}} ) 43 44 IF(CMAKE_COMPILER_IS_GNUCXX) 45 46 GET_TARGET_PROPERTY(_targetType ${_PCH_current_target} TYPE) 47 IF(${_targetType} STREQUAL SHARED_LIBRARY AND NOT WIN32) 48 LIST(APPEND ${_out_compile_flags} "-fPIC") 49 ENDIF() 50 51 GET_TARGET_PROPERTY(_target_definitions ${_PCH_current_target} COMPILE_DEFINITIONS) 52 if(_target_definitions) 53 foreach(_def ${_target_definitions}) 54 LIST(APPEND ${_out_compile_flags} "-D${_def}") 55 endforeach() 56 endif() 57 58 ELSE() 59 ## TODO ... ? or does it work out of the box 60 ENDIF() 61 62 GET_DIRECTORY_PROPERTY(DIRINC INCLUDE_DIRECTORIES ) 63 FOREACH(item ${DIRINC}) 64 if(item MATCHES "^${OpenCV_SOURCE_DIR}/modules/") 65 LIST(APPEND ${_out_compile_flags} "${_PCH_include_prefix}\"${item}\"") 66 else() 67 LIST(APPEND ${_out_compile_flags} "${_PCH_isystem_prefix}\"${item}\"") 68 endif() 69 ENDFOREACH(item) 70 71 get_target_property(DIRINC ${_PCH_current_target} INCLUDE_DIRECTORIES ) 72 FOREACH(item ${DIRINC}) 73 if(item MATCHES "^${OpenCV_SOURCE_DIR}/modules/") 74 LIST(APPEND ${_out_compile_flags} "${_PCH_include_prefix}\"${item}\"") 75 else() 76 LIST(APPEND ${_out_compile_flags} "${_PCH_isystem_prefix}\"${item}\"") 77 endif() 78 ENDFOREACH(item) 79 80 GET_DIRECTORY_PROPERTY(_directory_flags DEFINITIONS) 81 GET_DIRECTORY_PROPERTY(_global_definitions DIRECTORY ${OpenCV_SOURCE_DIR} DEFINITIONS) 82 #MESSAGE("_directory_flags ${_directory_flags} ${_global_definitions}" ) 83 LIST(APPEND ${_out_compile_flags} ${_directory_flags}) 84 LIST(APPEND ${_out_compile_flags} ${_global_definitions}) 85 LIST(APPEND ${_out_compile_flags} ${CMAKE_CXX_FLAGS}) 86 87 SEPARATE_ARGUMENTS(${_out_compile_flags}) 88 89ENDMACRO(_PCH_GET_COMPILE_FLAGS) 90 91 92MACRO(_PCH_WRITE_PCHDEP_CXX _targetName _include_file _dephelp) 93 94 SET(${_dephelp} ${CMAKE_CURRENT_BINARY_DIR}/${_targetName}_pch_dephelp.cxx) 95 IF(CMAKE_HOST_WIN32) 96 ADD_CUSTOM_COMMAND( 97 OUTPUT "${${_dephelp}}" 98 COMMAND ${CMAKE_COMMAND} -E echo "#include \\\"${_include_file}\\\"" > "${${_dephelp}}" 99 COMMAND ${CMAKE_COMMAND} -E echo "int testfunction();" >> "${${_dephelp}}" 100 COMMAND ${CMAKE_COMMAND} -E echo "int testfunction()" >> "${${_dephelp}}" 101 COMMAND ${CMAKE_COMMAND} -E echo "{" >> "${${_dephelp}}" 102 COMMAND ${CMAKE_COMMAND} -E echo " return 0;" >> "${${_dephelp}}" 103 COMMAND ${CMAKE_COMMAND} -E echo "}" >> "${${_dephelp}}" 104 DEPENDS "${_include_file}" 105 ) 106 else() 107 ADD_CUSTOM_COMMAND( 108 OUTPUT "${${_dephelp}}" 109 COMMAND ${CMAKE_COMMAND} -E echo "\\#include \\\"${_include_file}\\\"" > "${${_dephelp}}" 110 COMMAND ${CMAKE_COMMAND} -E echo "int testfunction\\(\\)\\;" >> "${${_dephelp}}" 111 COMMAND ${CMAKE_COMMAND} -E echo "int testfunction\\(\\)" >> "${${_dephelp}}" 112 COMMAND ${CMAKE_COMMAND} -E echo "{" >> "${${_dephelp}}" 113 COMMAND ${CMAKE_COMMAND} -E echo " \\return 0\\;" >> "${${_dephelp}}" 114 COMMAND ${CMAKE_COMMAND} -E echo "}" >> "${${_dephelp}}" 115 DEPENDS "${_include_file}" 116 ) 117 endif() 118 119ENDMACRO(_PCH_WRITE_PCHDEP_CXX ) 120 121MACRO(_PCH_GET_COMPILE_COMMAND out_command _input _output) 122 123 FILE(TO_NATIVE_PATH ${_input} _native_input) 124 FILE(TO_NATIVE_PATH ${_output} _native_output) 125 126 IF(CMAKE_COMPILER_IS_GNUCXX) 127 IF(CMAKE_CXX_COMPILER_ARG1) 128 # remove leading space in compiler argument 129 STRING(REGEX REPLACE "^ +" "" pchsupport_compiler_cxx_arg1 ${CMAKE_CXX_COMPILER_ARG1}) 130 131 SET(${out_command} 132 ${CMAKE_CXX_COMPILER} ${pchsupport_compiler_cxx_arg1} ${_compile_FLAGS} -x c++-header -o ${_output} ${_input} 133 ) 134 ELSE(CMAKE_CXX_COMPILER_ARG1) 135 SET(${out_command} 136 ${CMAKE_CXX_COMPILER} ${_compile_FLAGS} -x c++-header -o ${_output} ${_input} 137 ) 138 ENDIF(CMAKE_CXX_COMPILER_ARG1) 139 ELSE(CMAKE_COMPILER_IS_GNUCXX) 140 141 SET(_dummy_str "#include <${_input}>") 142 FILE(WRITE ${CMAKE_CURRENT_BINARY_DIR}/pch_dummy.cpp ${_dummy_str}) 143 144 SET(${out_command} 145 ${CMAKE_CXX_COMPILER} ${_compile_FLAGS} /c /Fp${_native_output} /Yc${_native_input} pch_dummy.cpp 146 ) 147 #/out:${_output} 148 149 ENDIF(CMAKE_COMPILER_IS_GNUCXX) 150 151ENDMACRO(_PCH_GET_COMPILE_COMMAND ) 152 153 154MACRO(_PCH_GET_TARGET_COMPILE_FLAGS _cflags _header_name _pch_path _dowarn ) 155 156 FILE(TO_NATIVE_PATH ${_pch_path} _native_pch_path) 157 158 IF(CMAKE_COMPILER_IS_GNUCXX) 159 # for use with distcc and gcc >4.0.1 if preprocessed files are accessible 160 # on all remote machines set 161 # PCH_ADDITIONAL_COMPILER_FLAGS to -fpch-preprocess 162 # if you want warnings for invalid header files (which is very inconvenient 163 # if you have different versions of the headers for different build types 164 # you may set _pch_dowarn 165 IF (_dowarn) 166 SET(${_cflags} "${PCH_ADDITIONAL_COMPILER_FLAGS} -include \"${CMAKE_CURRENT_BINARY_DIR}/${_header_name}\" -Winvalid-pch " ) 167 ELSE (_dowarn) 168 SET(${_cflags} "${PCH_ADDITIONAL_COMPILER_FLAGS} -include \"${CMAKE_CURRENT_BINARY_DIR}/${_header_name}\" " ) 169 ENDIF (_dowarn) 170 171 ELSE(CMAKE_COMPILER_IS_GNUCXX) 172 173 set(${_cflags} "/Fp${_native_pch_path} /Yu${_header_name}" ) 174 175 ENDIF(CMAKE_COMPILER_IS_GNUCXX) 176 177ENDMACRO(_PCH_GET_TARGET_COMPILE_FLAGS ) 178 179 180MACRO(GET_PRECOMPILED_HEADER_OUTPUT _targetName _input _output) 181 182 GET_FILENAME_COMPONENT(_name ${_input} NAME) 183 GET_FILENAME_COMPONENT(_path ${_input} PATH) 184 SET(${_output} "${CMAKE_CURRENT_BINARY_DIR}/${_name}.gch/${_targetName}_${CMAKE_BUILD_TYPE}.gch") 185 186ENDMACRO(GET_PRECOMPILED_HEADER_OUTPUT _targetName _input) 187 188 189MACRO(ADD_PRECOMPILED_HEADER_TO_TARGET _targetName _input _pch_output_to_use ) 190 191 # to do: test whether compiler flags match between target _targetName 192 # and _pch_output_to_use 193 GET_FILENAME_COMPONENT(_name ${_input} NAME) 194 195 IF(ARGN STREQUAL "0") 196 SET(_dowarn 0) 197 ELSE() 198 SET(_dowarn 1) 199 ENDIF() 200 201 _PCH_GET_TARGET_COMPILE_FLAGS(_target_cflags ${_name} ${_pch_output_to_use} ${_dowarn}) 202 #MESSAGE("Add flags ${_target_cflags} to ${_targetName} " ) 203 204 GET_TARGET_PROPERTY(_sources ${_targetName} SOURCES) 205 FOREACH(src ${_sources}) 206 if(NOT "${src}" MATCHES "\\.mm$") 207 get_source_file_property(_flags "${src}" COMPILE_FLAGS) 208 if(_flags) 209 set(_flags "${_flags} ${_target_cflags}") 210 else() 211 set(_flags "${_target_cflags}") 212 endif() 213 214 set_source_files_properties("${src}" PROPERTIES COMPILE_FLAGS "${_flags}") 215 endif() 216 ENDFOREACH() 217 218 ADD_CUSTOM_TARGET(pch_Generate_${_targetName} 219 DEPENDS ${_pch_output_to_use} 220 ) 221 222 ADD_DEPENDENCIES(${_targetName} pch_Generate_${_targetName} ) 223 224ENDMACRO(ADD_PRECOMPILED_HEADER_TO_TARGET) 225 226MACRO(ADD_PRECOMPILED_HEADER _targetName _input) 227 228 SET(_PCH_current_target ${_targetName}) 229 230 IF(NOT CMAKE_BUILD_TYPE) 231 MESSAGE(FATAL_ERROR 232 "This is the ADD_PRECOMPILED_HEADER macro. " 233 "You must set CMAKE_BUILD_TYPE!" 234 ) 235 ENDIF() 236 237 IF(ARGN STREQUAL "0") 238 SET(_dowarn 0) 239 ELSE() 240 SET(_dowarn 1) 241 ENDIF() 242 243 GET_FILENAME_COMPONENT(_name ${_input} NAME) 244 GET_FILENAME_COMPONENT(_path ${_input} PATH) 245 GET_PRECOMPILED_HEADER_OUTPUT( ${_targetName} ${_input} _output) 246 247 _PCH_WRITE_PCHDEP_CXX(${_targetName} "${_input}" _pch_dephelp_cxx) 248 249 ADD_LIBRARY(${_targetName}_pch_dephelp STATIC "${_pch_dephelp_cxx}" "${_input}" ) 250 251 set_target_properties(${_targetName}_pch_dephelp PROPERTIES 252 DEBUG_POSTFIX "${OPENCV_DEBUG_POSTFIX}" 253 ARCHIVE_OUTPUT_DIRECTORY "${LIBRARY_OUTPUT_PATH}" 254 ) 255 256 _PCH_GET_COMPILE_FLAGS(_compile_FLAGS) 257 258 get_target_property(type ${_targetName} TYPE) 259 if(type STREQUAL "SHARED_LIBRARY") 260 get_target_property(__DEFINES ${_targetName} DEFINE_SYMBOL) 261 if(NOT __DEFINES MATCHES __DEFINES-NOTFOUND) 262 list(APPEND _compile_FLAGS "${_PCH_define_prefix}${__DEFINES}") 263 endif() 264 endif() 265 266 get_target_property(DIRINC ${_targetName} INCLUDE_DIRECTORIES) 267 set_target_properties(${_targetName}_pch_dephelp PROPERTIES INCLUDE_DIRECTORIES "${DIRINC}") 268 269 #MESSAGE("_compile_FLAGS: ${_compile_FLAGS}") 270 #message("COMMAND ${CMAKE_CXX_COMPILER} ${_compile_FLAGS} -x c++-header -o ${_output} ${_input}") 271 272 ADD_CUSTOM_COMMAND( 273 OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${_name}" 274 COMMAND ${CMAKE_COMMAND} -E copy "${_input}" "${CMAKE_CURRENT_BINARY_DIR}/${_name}" # ensure same directory! Required by gcc 275 DEPENDS "${_input}" 276 ) 277 278 #message("_command ${_input} ${_output}") 279 _PCH_GET_COMPILE_COMMAND(_command ${CMAKE_CURRENT_BINARY_DIR}/${_name} ${_output} ) 280 281 GET_FILENAME_COMPONENT(_outdir ${_output} PATH) 282 ADD_CUSTOM_COMMAND( 283 OUTPUT "${_output}" 284 COMMAND ${CMAKE_COMMAND} -E make_directory "${_outdir}" 285 COMMAND ${_command} 286 DEPENDS "${_input}" 287 DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/${_name}" 288 DEPENDS ${_targetName}_pch_dephelp 289 ) 290 291 ADD_PRECOMPILED_HEADER_TO_TARGET(${_targetName} ${_input} ${_output} ${_dowarn}) 292 293ENDMACRO(ADD_PRECOMPILED_HEADER) 294 295 296# Generates the use of precompiled in a target, 297# without using depency targets (2 extra for each target) 298# Using Visual, must also add ${_targetName}_pch to sources 299# Not needed by Xcode 300 301MACRO(GET_NATIVE_PRECOMPILED_HEADER _targetName _input) 302 303 if(CMAKE_GENERATOR MATCHES "^Visual.*$") 304 set(_dummy_str "#include \"${_input}\"\n") 305 306 set(${_targetName}_pch ${CMAKE_CURRENT_BINARY_DIR}/${_targetName}_pch.cpp) 307 if(EXISTS ${${_targetName}_pch}) 308 # Check if contents is the same, if not rewrite 309 # todo 310 else() 311 FILE(WRITE ${${_targetName}_pch} ${_dummy_str}) 312 endif() 313 endif() 314 315ENDMACRO(GET_NATIVE_PRECOMPILED_HEADER) 316 317 318MACRO(ADD_NATIVE_PRECOMPILED_HEADER _targetName _input) 319 320 IF(ARGN STREQUAL "0") 321 SET(_dowarn 0) 322 ELSE() 323 SET(_dowarn 1) 324 ENDIF() 325 326 if(CMAKE_GENERATOR MATCHES "^Visual.*$") 327 328 # Auto include the precompile (useful for moc processing, since the use of 329 # precompiled is specified at the target level 330 # and I don't want to specifiy /F- for each moc/res/ui generated files (using Qt) 331 332 GET_TARGET_PROPERTY(oldProps ${_targetName} COMPILE_FLAGS) 333 if (oldProps MATCHES NOTFOUND) 334 SET(oldProps "") 335 endif() 336 337 SET(newProperties "${oldProps} /Yu\"${_input}\" /FI\"${_input}\"") 338 SET_TARGET_PROPERTIES(${_targetName} PROPERTIES COMPILE_FLAGS "${newProperties}") 339 340 #also inlude ${oldProps} to have the same compile options 341 SET_SOURCE_FILES_PROPERTIES(${${_targetName}_pch} PROPERTIES COMPILE_FLAGS "${oldProps} /Yc\"${_input}\"") 342 343 elseif (CMAKE_GENERATOR MATCHES Xcode) 344 345 # For Xcode, cmake needs my patch to process 346 # GCC_PREFIX_HEADER and GCC_PRECOMPILE_PREFIX_HEADER as target properties 347 348 # When buiding out of the tree, precompiled may not be located 349 # Use full path instead. 350 GET_FILENAME_COMPONENT(fullPath ${_input} ABSOLUTE) 351 352 SET_TARGET_PROPERTIES(${_targetName} PROPERTIES XCODE_ATTRIBUTE_GCC_PREFIX_HEADER "${fullPath}") 353 SET_TARGET_PROPERTIES(${_targetName} PROPERTIES XCODE_ATTRIBUTE_GCC_PRECOMPILE_PREFIX_HEADER "YES") 354 355 else() 356 357 #Fallback to the "old" precompiled suppport 358 #ADD_PRECOMPILED_HEADER(${_targetName} ${_input} ${_dowarn}) 359 360 endif() 361 362ENDMACRO(ADD_NATIVE_PRECOMPILED_HEADER) 363 364macro(ocv_add_precompiled_header_to_target the_target pch_header) 365 if(PCHSupport_FOUND AND ENABLE_PRECOMPILED_HEADERS AND EXISTS "${pch_header}") 366 if(CMAKE_GENERATOR MATCHES "^Visual" OR CMAKE_GENERATOR MATCHES Xcode) 367 add_native_precompiled_header(${the_target} ${pch_header}) 368 elseif(CMAKE_COMPILER_IS_GNUCXX AND CMAKE_GENERATOR MATCHES "Makefiles|Ninja") 369 add_precompiled_header(${the_target} ${pch_header}) 370 endif() 371 endif() 372endmacro() 373