Re: Bootstrapping hppa64? CPP problem

[Neil Booth <neil@daikokuya.co.uk>]

Steve Ellcey wrote:-

> I am curious if anyone is currently bootstrapping the hppa64 GCC
> compiler from the latest sources?  I am running into a very curious cpp
> problem.  With the attached example, using the cc1 that I just built I
> get two definitions of sigpause showing up because _SVID2 seems to be
> considered defined and undefined at the same time.  It doesn't happen on
> the other platforms I have tried but it happens consistenly for me on
> PA64.
> 
> Steve Ellcey
> sje@cup.hp.com
> 
> [hpsje - sje_pa64] $ cat x.c
> #define _SVID2
> 
> #if !defined(_SVID2)
>      extern long sigpause(long);
> #endif
> 
> #if defined(_SVID2)
>            extern int sigpause(int);
> #endif

Steve,

Could you step into the code (should be not too hard to grok
for such a simple case) starting with the #define and see
what hash entry pointer is given for _SVID2?  Then figure
out why you're not getting it for the !defined line?

A breakpoint on do_define() might be useful; be sure to
step into lex_macro_node () which lexes and creates a hash
entry for _SVID2.  If this is a CPP bug I would really like
to catch it.

Neil.