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find_program(JAVACC_EXECUTABLE NAMES javacc javaCC Javacc JavaCC javacc.bat DOC "path to the javacc executable")
mark_as_advanced(JAVACC_EXECUTABLE)
set(JAVACC_FOUND 0)
if(JAVACC_EXECUTABLE)
execute_process(
COMMAND "${JAVACC_EXECUTABLE}" -version
OUTPUT_VARIABLE JAVACC_TEMP_VERSION
)
string(REGEX MATCH ".* ([0-9]+(\\.[0-9]+)+) .*" JAVACC_TEMP_VERSION2_UNUSED "${JAVACC_TEMP_VERSION}")
if(CMAKE_MATCH_1)
set(JAVACC_FOUND 1)
set(JAVACC_VERSION ${CMAKE_MATCH_1})
else()
string(REGEX MATCH "([0-9]+(\\.[0-9]+)+)" JAVACC_TEMP_VERSION3_UNUSED "${JAVACC_TEMP_VERSION}")
if(CMAKE_MATCH_1)
set(JAVACC_FOUND 1)
set(JAVACC_VERSION ${CMAKE_MATCH_1})
endif()
endif()
endif()
if(JAVACC_FOUND)
message(STATUS "The javacc executable: ${JAVACC_EXECUTABLE} (found version \"${JAVACC_VERSION}\")")
else()
message(STATUS "The javacc executable not found, using existing files")
endif()
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