Andrew Haley writes:
> D'arito writes:
> >
> > HI Folks,
> > I need to "undergrade" my gcc version that comes with openSuse
> > 10.2. Well the default version is gcc version 4.1.2 20061115
> > (prerelease) (SUSE Linux). I do really need the old version,
> > because my "mentor" told me my code compiles properly with
> > gcc-3.3.3 ( just I need to compile using a static library called
> > libESP.a) . So I decided to install a previous version in order to
> > avoid modify the libESP.a , cause I thought it was harder than
> > install another compiler version.
> >
> > After reading in forums, asking buddies, and losing a lot of time(
> > I know that's the way sometimes) I couldn't install gcc-3.3.3 yet !
> > It's so annoying. I just claim for help .
> >
> > I've achieved to run the configure script in a gcc-build directory, but I
> > got an error withing the make. :
> > ../../gcc-3.3.3/gcc/read-rtl.c: In function ?read_rtx?:
> > ../../gcc-3.3.3/gcc/read-rtl.c:653: error: invalid lvalue in increment
> > make[1]: *** [read-rtl.o] Error 1
> > make[1]: Leaving directory `/opt/gcc3/gcc-build/gcc'
> > make: *** [all-gcc] Error 2
> >
> >
> > I've also tried by using rpms without success too...
> >
> > Feel free to ask me for important data , kie logs or whatever you need.
> >
> > I'm able to establish a VNC session if anyone have time to help me online.
> > thanks a lot , I would appreciate your interest so much !!
>
> OK. I can see your problem: you have nonstandard code that gcc won't
> compile any more, so you want an old gcc that will compile it. But the
> new gcc won't compile the old gcc either.
>
> I'm guessing that the problem here is that old gcc uses what's known
> as an "lvalue cast", which is a language feature that has been removed
> from gcc. It's possible to fix the gcc source so that it doesn't use
> an lvalue cast, or it's possible to fix your own code so that it
> compiles with a modern gcc. I'd do the latter.
If you want to fix the lvalue cast in obstack.h you can just do
something like this:
# define obstack_ptr_grow(OBSTACK,datum) \
__extension__ \
({ struct obstack *__o = (OBSTACK); \
if (__o->next_free + sizeof (void *) > __o->chunk_limit) \
_obstack_newchunk (__o, sizeof (void *)); \
void **__tmp = (void**)__o->next_free; \
*__tmp++ = ((void *)datum); \
__o->next_free = (char*)__tmp; \
/* *((void **)__o->next_free)++ = ((void *)datum); */ \
(void) 0; })
This might be all you need, but I wouldn't guarantee it. You must
make gcc-3.3.3 with "make bootstrap".
Andrew.
--
Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, UK
Registered in England and Wales No. 3798903
