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FindFLEX: fix version parsing for old flex versions

This commit is contained in:
Rolf Eike Beer 2012-01-20 17:44:00 +01:00
parent b8ff1c1e72
commit 2cf5df3e58
1 changed files with 5 additions and 1 deletions
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6
Modules/FindFLEX.cmake
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@ -91,8 +91,12 @@ IF(FLEX_EXECUTABLE)
MESSAGE("Command \"${FLEX_EXECUTABLE} --version\" failed with output:\n${FLEX_version_output}\n${FLEX_version_error}\nFLEX_VERSION will not be available")
ENDIF()
ELSE()
STRING(REGEX REPLACE "^flex (.*)$" "\\1"
# older versions of flex printed "/full/path/to/executable version X.Y"
# newer versions use "basename(executable) X.Y"
GET_FILENAME_COMPONENT(FLEX_EXE_NAME "${FLEX_EXECUTABLE}" NAME)
STRING(REGEX REPLACE "^.*${FLEX_EXE_NAME} (version )?([0-9]+[^ ]*)$" "\\2"
FLEX_VERSION "${FLEX_version_output}")
UNSET(FLEX_EXE_NAME)
ENDIF()
#============================================================