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Problems with YYDEBUG and C++


From: Potthoff, Kay
Subject: Problems with YYDEBUG and C++
Date: Thu, 5 Sep 2002 10:30:47 +0200

Hello,
 
I'm not shure if this is really a bug, but I think perhaps some corrective action is preferrable.
 
I tried to compile my bison stuff with the C++ compiler and got an error:
 
    # bison -d -v -t parser.yxx
    # mv y.tab.c parser.cxx
    # c++ -Wall -g -DYYDEBUG=1 -c parser.cxx -I.
 
    y.tab.c: In function `int yyparse()':
    y.tab.c: 388: too many arguments to function `char* getenv()'
 
I have taken a look into the produced sources and have seen that first there is a forward declaration of getenv():
 
    extern char* getenv();
 
but later then getenv() is used with one argument:
 
    ... getenv("YYDEBUG") ...
 
This is ok for a C-compiler but my C++-compiler don't like this. By the way, if I compile with YYDEBUG=0 then the C++-compiler runs without any complains.
 
The version of bison is 1.28, the version of gcc is 3.0.
 
Regards, Kay
 
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