| Brian Waters | 13d9601 | 2017-12-08 16:53:31 -0600 | [diff] [blame] | 1 | # - Look for GNU flex, the lexer generator. |
| 2 | # Defines the following: |
| 3 | # FLEX_EXECUTABLE - path to the flex executable |
| 4 | # FLEX_FILE - parse a file with flex |
| 5 | # FLEX_PREFIX_OUTPUTS - Set to true to make FLEX_FILE produce outputs of |
| 6 | # lex.${filename}.c, not lex.yy.c . Passes -P to flex. |
| 7 | |
| 8 | IF(NOT DEFINED FLEX_PREFIX_OUTPUTS) |
| 9 | SET(FLEX_PREFIX_OUTPUTS FALSE) |
| 10 | ENDIF(NOT DEFINED FLEX_PREFIX_OUTPUTS) |
| 11 | |
| 12 | IF(NOT FLEX_EXECUTABLE) |
| 13 | MESSAGE(STATUS "Looking for flex") |
| 14 | FIND_PROGRAM(FLEX_EXECUTABLE flex) |
| 15 | IF(FLEX_EXECUTABLE) |
| 16 | MESSAGE(STATUS "Looking for flex -- ${FLEX_EXECUTABLE}") |
| 17 | ENDIF(FLEX_EXECUTABLE) |
| 18 | MARK_AS_ADVANCED(FLEX_EXECUTABLE) |
| 19 | ENDIF(NOT FLEX_EXECUTABLE) |
| 20 | |
| 21 | IF(FLEX_EXECUTABLE) |
| 22 | MACRO(FLEX_FILE FILENAME) |
| 23 | GET_FILENAME_COMPONENT(PATH "${FILENAME}" PATH) |
| 24 | IF("${PATH}" STREQUAL "") |
| 25 | SET(PATH_OPT "") |
| 26 | ELSE("${PATH}" STREQUAL "") |
| 27 | SET(PATH_OPT "/${PATH}") |
| 28 | ENDIF("${PATH}" STREQUAL "") |
| 29 | IF(NOT EXISTS "${CMAKE_CURRENT_BINARY_DIR}${PATH_OPT}") |
| 30 | FILE(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}${PATH_OPT}") |
| 31 | ENDIF(NOT EXISTS "${CMAKE_CURRENT_BINARY_DIR}${PATH_OPT}") |
| 32 | IF(FLEX_PREFIX_OUTPUTS) |
| 33 | GET_FILENAME_COMPONENT(PREFIX "${FILENAME}" NAME_WE) |
| 34 | ELSE(FLEX_PREFIX_OUTPUTS) |
| 35 | SET(PREFIX "yy") |
| 36 | ENDIF(FLEX_PREFIX_OUTPUTS) |
| 37 | SET(OUTFILE "${CMAKE_CURRENT_BINARY_DIR}${PATH_OPT}/lex.${PREFIX}.c") |
| 38 | ADD_CUSTOM_COMMAND( |
| 39 | OUTPUT "${OUTFILE}" |
| 40 | COMMAND "${FLEX_EXECUTABLE}" |
| 41 | ARGS "-P${PREFIX}" |
| 42 | "-o${OUTFILE}" |
| 43 | "${CMAKE_CURRENT_SOURCE_DIR}/${FILENAME}" |
| 44 | DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/${FILENAME}") |
| 45 | SET_SOURCE_FILES_PROPERTIES("${OUTFILE}" PROPERTIES GENERATED TRUE) |
| 46 | ENDMACRO(FLEX_FILE) |
| 47 | ENDIF(FLEX_EXECUTABLE) |