| # - Look for GNU flex, the lexer generator. |
| # Defines the following: |
| # FLEX_EXECUTABLE - path to the flex executable |
| # FLEX_FILE - parse a file with flex |
| # FLEX_PREFIX_OUTPUTS - Set to true to make FLEX_FILE produce outputs of |
| # lex.${filename}.c, not lex.yy.c . Passes -P to flex. |
| |
| IF(NOT DEFINED FLEX_PREFIX_OUTPUTS) |
| SET(FLEX_PREFIX_OUTPUTS FALSE) |
| ENDIF(NOT DEFINED FLEX_PREFIX_OUTPUTS) |
| |
| IF(NOT FLEX_EXECUTABLE) |
| MESSAGE(STATUS "Looking for flex") |
| FIND_PROGRAM(FLEX_EXECUTABLE flex) |
| IF(FLEX_EXECUTABLE) |
| MESSAGE(STATUS "Looking for flex -- ${FLEX_EXECUTABLE}") |
| ENDIF(FLEX_EXECUTABLE) |
| MARK_AS_ADVANCED(FLEX_EXECUTABLE) |
| ENDIF(NOT FLEX_EXECUTABLE) |
| |
| IF(FLEX_EXECUTABLE) |
| MACRO(FLEX_FILE FILENAME) |
| GET_FILENAME_COMPONENT(PATH "${FILENAME}" PATH) |
| IF("${PATH}" STREQUAL "") |
| SET(PATH_OPT "") |
| ELSE("${PATH}" STREQUAL "") |
| SET(PATH_OPT "/${PATH}") |
| ENDIF("${PATH}" STREQUAL "") |
| IF(NOT EXISTS "${CMAKE_CURRENT_BINARY_DIR}${PATH_OPT}") |
| FILE(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}${PATH_OPT}") |
| ENDIF(NOT EXISTS "${CMAKE_CURRENT_BINARY_DIR}${PATH_OPT}") |
| IF(FLEX_PREFIX_OUTPUTS) |
| GET_FILENAME_COMPONENT(PREFIX "${FILENAME}" NAME_WE) |
| ELSE(FLEX_PREFIX_OUTPUTS) |
| SET(PREFIX "yy") |
| ENDIF(FLEX_PREFIX_OUTPUTS) |
| SET(OUTFILE "${CMAKE_CURRENT_BINARY_DIR}${PATH_OPT}/lex.${PREFIX}.c") |
| ADD_CUSTOM_COMMAND( |
| OUTPUT "${OUTFILE}" |
| COMMAND "${FLEX_EXECUTABLE}" |
| ARGS "-P${PREFIX}" |
| "-o${OUTFILE}" |
| "${CMAKE_CURRENT_SOURCE_DIR}/${FILENAME}" |
| DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/${FILENAME}") |
| SET_SOURCE_FILES_PROPERTIES("${OUTFILE}" PROPERTIES GENERATED TRUE) |
| ENDMACRO(FLEX_FILE) |
| ENDIF(FLEX_EXECUTABLE) |