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# use bison for .yy files
# search for bison
MACRO(FIND_BISON)
IF(NOT BISON_EXECUTABLE)
IF (MSVC)
FIND_PROGRAM(BISON_EXECUTABLE PATHS
NAMES bison.exe
PATHS $ENV{LIB_DIR}/bin $ENV{PROGRAMFILES}/GnuWin32/bin
)
ELSE (MSVC)
FIND_PROGRAM(BISON_EXECUTABLE bison)
ENDIF (MSVC)
IF (NOT BISON_EXECUTABLE)
MESSAGE(FATAL_ERROR "Bison not found - aborting")
ELSE (NOT BISON_EXECUTABLE)
EXEC_PROGRAM(${BISON_EXECUTABLE} ARGS --version OUTPUT_VARIABLE BISON_VERSION_STR)
# get first line in case it's multiline
STRING(REGEX REPLACE "([^\n]+).*" "\\1" FIRST_LINE "${BISON_VERSION_STR}")
# get version information
STRING(REGEX REPLACE ".* ([0-9]+)\\.([0-9]+)" "\\1" BISON_VERSION_MAJOR "${FIRST_LINE}")
STRING(REGEX REPLACE ".* ([0-9]+)\\.([0-9]+)" "\\2" BISON_VERSION_MINOR "${FIRST_LINE}")
IF (BISON_VERSION_MAJOR LESS 2)
MESSAGE (FATAL_ERROR "Bison version is too old (${BISON_VERSION_MAJOR}.${BISON_VERSION_MINOR}). Use 2.0 or higher.")
ENDIF (BISON_VERSION_MAJOR LESS 2)
ENDIF (NOT BISON_EXECUTABLE)
ENDIF(NOT BISON_EXECUTABLE)
ENDMACRO(FIND_BISON)
MACRO(ADD_BISON_FILES _sources )
FIND_BISON()
FOREACH (_current_FILE ${ARGN})
GET_FILENAME_COMPONENT(_in ${_current_FILE} ABSOLUTE)
GET_FILENAME_COMPONENT(_basename ${_current_FILE} NAME_WE)
SET(_out ${CMAKE_CURRENT_BINARY_DIR}/${_basename}.cpp)
# bison options:
# -t add debugging facilities
# -d produce additional header file (used in parser.l)
# -v produce additional *.output file with parser states
ADD_CUSTOM_COMMAND(
OUTPUT ${_out}
COMMAND ${BISON_EXECUTABLE}
ARGS
-o${_out} -d -v -t
${_in}
DEPENDS ${_in}
)
SET(${_sources} ${${_sources}} ${_out} )
ENDFOREACH (_current_FILE)
ENDMACRO(ADD_BISON_FILES)
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