CMake tip - if dispatcher generated cpp files are not rebuilding after changing a header about libsimdpp HOT 4 CLOSED

    # add current path to include paths so generated simd variations are
    # able to reference the same includes found in base version
    include_directories("${CMAKE_CURRENT_SOURCE_DIR}/${SRC_PATH}")

    foreach(ARCH ${ARCHS})
        simdpp_get_arch_info(CXX_FLAGS DEFINES_LIST SUFFIX ${ARCH})

        if(NOT "${SUFFIX}" STREQUAL "")
            # Copy the source file and add the required flags
            set(DST_ABS_FILE "${CMAKE_CURRENT_BINARY_DIR}/${SRC_PATH}/${SRC_NAME}_simdpp_${SUFFIX}${SRC_EXT}")
            set(SRC_ABS_FILE "${CMAKE_CURRENT_SOURCE_DIR}/${SRC_FILE}")
            configure_file("${SRC_ABS_FILE}" "${DST_ABS_FILE}" COPYONLY)
            list(APPEND FILE_LIST "${DST_ABS_FILE}")

            # let CMake know that this file is created at build time
            set_source_files_properties("${DST_ABS_FILE}" PROPERTIES GENERATED TRUE)

            if (NOT "${CXX_FLAGS}" STREQUAL "")
              set_source_files_properties("${DST_ABS_FILE}" PROPERTIES COMPILE_FLAGS ${CXX_FLAGS})
            endif()

            # For the first file that is being processed, set it to emit
            # dispatcher code. The required flags will be added later
            if("${DISPATCHER_FILE}" STREQUAL "")
                set(DISPATCHER_FILE "${DST_ABS_FILE}")
            endif()

            # Add required dispatcher predefined macros for this architecture
            set(DISPATCHER_CXX_FLAGS "${DISPATCHER_CXX_FLAGS} -DSIMDPP_DISPATCH_ARCH${DISPATCH_ARCH_IDX}=${DEFINES_LIST}")
            math(EXPR DISPATCH_ARCH_IDX "${DISPATCH_ARCH_IDX}+1")
        endif()
    endforeach()