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-rw-r--r--Modules/FindBISON.cmake5
1 files changed, 3 insertions, 2 deletions
diff --git a/Modules/FindBISON.cmake b/Modules/FindBISON.cmake
index edde9eb..7af3367 100644
--- a/Modules/FindBISON.cmake
+++ b/Modules/FindBISON.cmake
@@ -75,8 +75,9 @@ IF(BISON_EXECUTABLE)
ELSEIF("${BISON_version_output}" MATCHES "^bison[^+]")
STRING(REGEX REPLACE "^bison \\(GNU Bison\\) ([^\n]+)\n.*" "\\1"
BISON_VERSION "${BISON_version_output}")
- ELSE()
- SET(BISON_VERSION "unknown")
+ ELSEIF("${BISON_version_output}" MATCHES "^GNU Bison ")
+ STRING(REGEX REPLACE "^GNU Bison (version )?([^\n]+).*" "\\2"
+ BISON_VERSION "${BISON_version_output}")
ENDIF()
ENDIF()