Re: cannot build lilypond 2.6.3 on powerpc

[Han-Wen Nienhuys]

Thomas Bushnell BSG wrote:
> Thomas Bushnell BSG <address@hidden> writes:
>
>
> > Ah, I have found the problem.  The Debian package builds gf2pbm with
> > optimization on (-O2).  gf2pbm misbehaves when compiled with
> > optimization, and works fine when compiled without.
>
>
> More specifically, failure happens with:
>
> -fschedule-insns -fstrict-aliasing -O
>
> But not with: -O or either of those -f optimizations alone.

there are some dodgy pointer casts in gf2pbm, specifically,

gf2pbm.c: In functie $-1òøread_GF_charòù:
gf2pbm.c:305: let op: initialization from incompatible pointer type

        BMUNIT  *cp, *basep, *maxp;
        char    **basep_cpp = &basep;

GCC4 has become much more agressive with considering cast pointers as 
unaliased by definition, so I would suspect this one.


> I'll try isolating it function by function now.
>
> Thomas


--
 Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen