[avrdude-dev] [bug #35406] configure.ac: check for yylex_destroy not sufficient

[Joerg Wunsch]

Follow-up Comment #2, bug #35406 (project avrdude):

Yeah, that's a pretty old system.  But it's a production Linux
system, so you can assume other similarly old systems can be
found in the wild.

No idea how old the source code has been; the binary dates to
2005.

Well, we could try to test-compile something, but it's also
possible to just check the output of flex -V.  The flex
documentation says yylex_destroy() has been supported as of
flex version 2.5.9:

http://flex.sourceforge.net/manual/The-Default-Memory-Management.html

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