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# - This is a module to Generate files using Glib-Marshal
# Both the header and source files (.h and .cpp)
# Copyright 2008 - Joshua L. Blocher
#
# And it defines the following variables:
# GLIB_MARSHAL_PREFIX - The name of the files
# GLIB_MARSHAL_FILE - File to Generate from (.list) and to generate to (.h and .cpp)
# GLIB_MARSHAL_OUTPUT_HEADER - Result of Generation
# GLIB_MARSHAL_OUTPUT_CPP - Result of Generation
# GLIB_MARSHAL_OUTPUT_LOCATION - Where we are putting the Output
FIND_PROGRAM(GLIB_MARSHAL_EXECUTABLE NAMES glib-genmarshal PATHS /usr/local/bin )
MACRO(GLIB_MARSHAL GLIB_MARSHAL_PREFIX GLIB_MARSHAL_FILE GLIB_MARSHAL_OUTPUT_LOCATION)
IF(GLIB_MARSHAL_EXECUTABLE)
SET(GLIB_MARSHAL_OUTPUT_EXTRA_LINE "#include \"${GLIB_MARSHAL_FILE}.h\" \n" )
MESSAGE(STATUS "Generating header and sourcefiles from ${GLIB_MARSHAL_FILE}.list (Glib-Marshal)")
EXECUTE_PROCESS(COMMAND ${GLIB_MARSHAL_EXECUTABLE} --prefix=${GLIB_MARSHAL_PREFIX} --header ${CMAKE_CURRENT_SOURCE_DIR}/${GLIB_MARSHAL_FILE}.list
OUTPUT_VARIABLE GLIB_MARSHAL_OUTPUT_HEADER )
EXECUTE_PROCESS(COMMAND ${GLIB_MARSHAL_EXECUTABLE} --prefix=${GLIB_MARSHAL_PREFIX} --body ${CMAKE_CURRENT_SOURCE_DIR}/${GLIB_MARSHAL_FILE}.list
OUTPUT_VARIABLE GLIB_MARSHAL_OUTPUT_CPP )
# check whether the generated file is the same as the existing one
IF(EXISTS ${CMAKE_CURRENT_BINARY_DIR}/${GLIB_MARSHAL_FILE}.h)
FILE(READ ${CMAKE_CURRENT_BINARY_DIR}/${GLIB_MARSHAL_FILE}.h GLIB_MARSHAL_HEADER_OLD)
ELSE()
SET(GLIB_MARSHAL_HEADER_OLD "")
ENDIF()
IF(NOT GLIB_MARSHAL_HEADER_OLD STREQUAL GLIB_MARSHAL_OUTPUT_HEADER)
MESSAGE(STATUS "${GLIB_MARSHAL_FILE}.h changed; overwriting")
FILE(WRITE ${CMAKE_CURRENT_BINARY_DIR}/${GLIB_MARSHAL_FILE}.h "${GLIB_MARSHAL_OUTPUT_HEADER}")
FILE(WRITE ${CMAKE_CURRENT_BINARY_DIR}/${GLIB_MARSHAL_FILE}.cpp "${GLIB_MARSHAL_OUTPUT_EXTRA_LINE}")
FILE(APPEND ${CMAKE_CURRENT_BINARY_DIR}/${GLIB_MARSHAL_FILE}.cpp "${GLIB_MARSHAL_OUTPUT_CPP}")
ELSE()
MESSAGE(STATUS "${GLIB_MARSHAL_FILE}.h unchanged")
ENDIF()
ENDIF()
ENDMACRO()
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