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Without this, when reconfiguring, BUILD_FILEVERSION will end up with a trailing comma with no revision number, which means that src/versioninfo.rc will have a syntax error on build. To reproduce/understand, download the plain gcrypt tarball; configure contains a line like this: BUILD_FILEVERSION="${BUILD_FILEVERSION}45409" After running configure, src/versioninfo.rc contains "FILEVERSION 1,7,8,45409". If running autoreconfigure with no enclosing git repo anywhere, the same line in configure will end up as this: BUILD_FILEVERSION="${BUILD_FILEVERSION}" After configuring, src/versioninfo.rc will now contain "FILEVERSION 1,7,8,", which results in syntax errors. As long as an enclosing git repo is available somewhere (if the surrounding vlc tree contains a .git directory), this isn't an issue though. Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
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