configure check for flex

Andreas Schwab
Tue Jan 28 13:36:00 GMT 2014

Hans-Peter Nilsson <> writes:

> See is_release in that same, that might be the only
> additional condition that's needed.

is_release only distinguishes a release from a snapshot, but does not
say anything whether its a tarball or a VC checkout (ie. is_release=yes
is also possible in a VC checkout).


Andreas Schwab,
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