Update of bug #15536 (project avrdude):
Status: None => Confirmed
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Follow-up Comment #1:
lexer.c is a generated file, from lexer.l. Thus, there is
no CVS file for it, so we cannot patch it that way.
I'm a bit surprised this file even makes it into the source
distribution, but that's the way "make distcheck" created
the tarball. I rather suspect a bug in the autoconf/automake
configuration files used in avrdude.
As a workaround, I suggest you remove lexer.c, config_gram.c,
and config_gram.h locally before starting the build, so the
make process will recreate them using your local lex and yacc.