🚀 go-pugleaf

The node `Debugging' in bison.texinfo explains how to enable debugging
using `#define YYDEBUG' in the parser file:

>To enable compilation of trace facilities, you must define the macro
>`YYDEBUG' when you compile the parser.  You could use `-DYYDEBUG' as
>a compiler option or you could put `#define YYDEBUG' in the C
>declarations section of the grammar file (*note C Declarations::.). 


`bison.simple' seems to expect this symbol to have a value --- it
uses it in a comparison:

#if YYDEBUG != 0

Should the text instead suggest using `#define YYDEBUG 1' or
`-DYYDEBUG=1' to enable debugging?

Thanks,
Rich@rice.edu