Re: [GNU bison 1.75b] testsuite.log: 14 failures

[Bruce Lilly]

Akim Demaille wrote:
>  Bruce> Finally, there are some bad interactions between bison 1.75b
>  Bruce> and flex 2.5.23: bison unconditionally #defines YYLTYPE, which
>  Bruce> causes grief when location tracking is undesired, 
>
> Why exactly did this cause a problem?

Flex 2.5.2[345] %option header generates a header file that contains
#ifdef YYLTYPE
and that causes inappropriate declataions for yylex, etc. when the
flex-generated header is included in the bison-generated parser.