+
+ set(Protobuf_VERSION 0)
Just set it to an empty string.
+ set(Protobuf_LIB_VERSION "")
+ file(STRINGS ${_Protobuf_COMMON_HEADER} _Protobuf_COMMON_H_CONTENTS
REGEX "#define GOOGLE_PROTOBUF_VERSION ")
I would replace the spaces with "[ \t]+" so a formatting change will not
break the extraction, also below.
+ set(_Protobuf_VERSION_REGEX "([0-9]+)")
No need for that variable, just put it into the matches argument below.
+ if("${_Protobuf_COMMON_H_CONTENTS}" MATCHES "#define
GOOGLE_PROTOBUF_VERSION ${_Protobuf_VERSION_REGEX}")
+ set(Protobuf_VERSION "${CMAKE_MATCH_1}")
+ endif()
+ unset(_Protobuf_COMMON_H_CONTENTS)
+
+ math(EXPR Protobuf_MAJOR_VERSION "${Protobuf_VERSION} / 1000000")
+ math(EXPR Protobuf_MINOR_VERSION "${Protobuf_VERSION} / 1000 %
1000")
+ math(EXPR Protobuf_SUBMINOR_VERSION "${Protobuf_VERSION} % 1000")
You are not required to export these variables, only if you expect it to
be useful for something beyond version checking. If anyone needs
specific version fiddling Protobuf_VERSION can be used.
Eike
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