1 # - Try to find Bison 2 # Once done this will define 3 # 4 # BISON_FOUND - system has Bison 5 # BISON_EXECUTABLE - path of the bison executable 6 # BISON_VERSION - the version string, like "2.5.31" 7 # 8 9 MACRO(FIND_BISON) 10 FIND_PROGRAM(BISON_EXECUTABLE NAMES bison) 11 12 IF(BISON_EXECUTABLE) 13 SET(BISON_FOUND TRUE) 14 15 EXECUTE_PROCESS(COMMAND ${BISON_EXECUTABLE} --version 16 OUTPUT_VARIABLE _BISON_VERSION 17 ) 18 string (REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" BISON_VERSION "${_bison_VERSION}") 19 ENDIF(BISON_EXECUTABLE) 20 21 IF(BISON_FOUND) 22 IF(NOT Bison_FIND_QUIETLY) 23 MESSAGE(STATUS "Found Bison: ${BISON_EXECUTABLE}") 24 ENDIF(NOT Bison_FIND_QUIETLY) 25 ELSE(BISON_FOUND) 26 IF(Bison_FIND_REQUIRED) 27 MESSAGE(FATAL_ERROR "Could not find Bison") 28 ENDIF(Bison_FIND_REQUIRED) 29 ENDIF(BISON_FOUND) 30 ENDMACRO(FIND_BISON) 31 32 MACRO(BISON_GENERATOR _PREFIX _Y_INPUT _H_OUTPUT _CPP_OUTPUT) 33 IF(BISON_EXECUTABLE) 34 GET_FILENAME_COMPONENT(_Y_DIR ${_Y_INPUT} PATH) 35 ADD_CUSTOM_COMMAND( 36 OUTPUT ${_CPP_OUTPUT} 37 OUTPUT ${_H_OUTPUT} 38 DEPENDS ${_Y_INPUT} 39 COMMAND ${BISON_EXECUTABLE} 40 ARGS 41 -p ${_PREFIX} -o"${_CPP_OUTPUT}" 42 --defines="${_H_OUTPUT}" ${_Y_INPUT} 43 WORKING_DIRECTORY ${_Y_DIR} 44 ) 45 SET_SOURCE_FILES_PROPERTIES( 46 ${_CPP_OUTPUT} ${_H_OUTPUT} 47 GENERATED 48 ) 49 ELSE(BISON_EXECUTABLE) 50 MESSAGE(SEND_ERROR "Can't find bison program, and it's required") 51 ENDIF(BISON_EXECUTABLE) 52 ENDMACRO(BISON_GENERATOR) 53
