Hello,
I would like to generate a lexer with debug functionality. I'm relying on a
slightly modified versions of the sources:
https://9fans.github.io/plan9port/man/man3/bio.html
https://9fans.github.io/plan9port/man/man1/yacc.html
https://9fans.github.io/plan9port/man/man1/lex.html
As far as I can tell, my issues are not related to the fact that I'm working
with a slightly modified version, but I thought I'll mention it just to be on
the safe side.
The first issue was that the debug information collected in fdebug was not
flushed and as a result the **y.debug** file for the lexer kept showing up
empty. I had to add Bterm(fdebug); at the end of the main() in **yacc.c** to
get the **y.debug** file to be generated with content.
Now, my issue is that if I'm compiling the generated **lex.yy.c** with
-DLEXDEBUG I get:
undefined reference to `allprint(char)'
because of sections like the one below:
# ifdef LEXDEBUG
if(debug){
fprintf(yyout,"char ");
allprint(yych);
putchar('\n');
}
# endif
The allprint() function is defined in the Lex source **sub1.c**. It seems I'd
have to link against the Lex source to be able to compile **lex.yy.c** in debug
mode, which would be a bit complicated as there are some clashes with my other
application. Other complications are caused by the global variables that show
up in allprint() and other functions that are listed in the DEBUG section of
**sub1.c**.
Can someone point me in the right direction, or tell me what am I missing here?
Thanks!
Gyorgy
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