Hi! I'm (once again) struggling with the creation of precompiled headers in conjunction with gcc and Qt on the Apple platform.
When creating my precompiled header I use a code section based on "PCHSupport_26.cmake" to extract the compile flags as follows: ---------- STRING(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" _flags_var_name) SET(_args ${CMAKE_CXX_FLAGS} ${${_flags_var_name}}) GET_DIRECTORY_PROPERTY(DIRINC INCLUDE_DIRECTORIES ) FOREACH(_item ${DIRINC}) LIST(APPEND _args "-I${_item}") ENDFOREACH(_item) GET_DIRECTORY_PROPERTY(_defines_global COMPILE_DEFINITIONS) LIST(APPEND defines ${_defines_global}) STRING(TOUPPER "COMPILE_DEFINITIONS_${CMAKE_BUILD_TYPE}" _defines_for_build_name) GET_DIRECTORY_PROPERTY(defines_build ${_defines_for_build_name}) LIST(APPEND _defines ${_defines_build}) FOREACH(_item ${_defines}) LIST(APPEND _args "-D${_item}") ENDFOREACH(_item ${_defines}) LIST(APPEND _args -c ${CMAKE_CURRENT_SOURCE_DIR}/${PRECOMPILED_HEADER} -o ${_gch_filename}) SEPARATE_ARGUMENTS(_args) ---------- Unfortunately the above compiler flags miss two important parameter that CMake does generate when using the build-in compiler rules: "-DQT_DEBUG" and when compiling with the generated precompiled header, I get errors as follows: file.h: not used because `QT_DEBUG' is defined. I would need your help with the following: 1) Is the above way to retrieve the compiler flags correct ? 2) Is there a better, easier, simpler way to do this ? 3) Why does -DQT_DEBUG not show up in COMPILE_DEFINITIONS or COMPILE_DEFINITIONS_${CMAKE_BUILD_TYPE} Thank you for your help in advance. D _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake