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# - Try to find Flex
# Once done this will define
#
# FLEX_FOUND - system has Flex
# FLEX_EXECUTABLE - path of the flex executable
# FLEX_VERSION - the version string, like "2.5.31"
# Copyright (c) 2008, Jakob Petsovits, <jpetso@gmx.at>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
FIND_PROGRAM(FLEX_EXECUTABLE NAMES flex)
INCLUDE(MacroEnsureVersion)
IF(FLEX_EXECUTABLE)
SET(FLEX_FOUND TRUE)
EXECUTE_PROCESS(COMMAND ${FLEX_EXECUTABLE} --version
OUTPUT_VARIABLE _FLEX_VERSION
)
string (REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" FLEX_VERSION "${_FLEX_VERSION}")
ENDIF(FLEX_EXECUTABLE)
FIND_PATH(FLEX_INCLUDE_DIR FlexLexer.h )
FIND_LIBRARY(FLEX_LIBRARY fl)
IF(FLEX_FOUND)
IF(NOT Flex_FIND_QUIETLY)
MESSAGE(STATUS "Found Flex: ${FLEX_EXECUTABLE} ${FLEX_VERSION}")
ENDIF(NOT Flex_FIND_QUIETLY)
ELSE(FLEX_FOUND)
IF(Flex_FIND_REQUIRED)
MESSAGE(FATAL_ERROR "Could not find Flex")
ENDIF(Flex_FIND_REQUIRED)
ENDIF(FLEX_FOUND)
MARK_AS_ADVANCED(FLEX_INCLUDE_DIR FLEX_LIBRARY FLEX_EXECUTABLE)
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