cmake/modules/FindBison.cmake

   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)