Date:	Fri, 02 Dec 1994 14:47:13 +0100
To:	djgpp AT sun DOT soe DOT clarkson DOT edu
From:	tony AT nt DOT tuwien DOT ac DOT at
Subject:	Multiple FLEX/BISONs in one program ?

Hi,

I have used FLEX/BISON for scanners and parsers many times before, but now I
should 
parse 3 different files (with different grammars) in one program.
Both BISON and FLEX allow to change their global variables using the -p (or
-P) commandline
option. Multiple use should therefore be possible.

But...
When using e.g. -paa I get an unresloved symbol "aaerror" (was yyerror
before) while linking.
yyerror seems to be in libbison.a
Anyway, there might be more problems, I haven't figured out yet.

Has someone successfully applied multiple scanners/parsers in one program
using FLEX/BISON ?
I studied the docs, but didn't find any hint.

Any ideas welcome !

Tony



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