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Fall back to the previous /etc/bash_completion.d dir on failures (either old bash completion or not installed). changes over Ville Skyttä's patch: define PKG_CHECK_VAR macro which became available only in pkg-config 0.28 see https://bugs.freedesktop.org/show_bug.cgi?id=88782 and https://bugs.freedesktop.org/show_bug.cgi?id=89540 Signed-off-by: Ville Skyttä <ville.skytta@iki.fi> Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
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