Re: [Gcl-devel] Re: gcl/maxima on hppa
email@example.com (LaMont Jones) writes:
> On Fri, Sep 13, 2002 at 10:17:04AM -0400, Camm Maguire wrote:
> > Greetings! I think I may have stumbled on a possible explanation for
> > gcl's build failure on hppa. Hppa alone will not relocate (i.e. allow
> > dlopen to open) modules not compiled with -fPIC. All other
> > architectures on which dlopen is currently used (alpha, ia64, mips,
> > mipsel)
> Actually, mips and mipsel force -fPIC on all compiles. The spec requires
> that shared objects be built with -fPIC.
OK. And on further investigation, the -fPIC theory is further
weakened by my finding that the i386 dlopen build works with -fPIC,
its just the i386 bfd build which breaks. Still investigating this.
> > 1) gcl can also relocate and load objects via a direct call to the BFD
> > library routine bfd_get_relocated_section_contents. This method is
> > currently used as the default on i386, sparc, ppc, s390, m68k and
> > arm. It is not yet fully implemented on hppa. Completing this
> > routine should enable a fully functional gcl, maxima, and in the
> > hopefully near future acl2 on this platform.
I like it too :-).
> > 2) Find a way to load objects with dlopen without -fPIC. Attempting
> > this results in the error that a certain relocation output by the
> > compiler cannot be handled by dlopen. Perhaps there is some other
> > gcc compiler option short of the full -fPIC which can avoid this
> > relocation?
> Nope. The non-PIC is truly not position independent.
They may not be position independent, but they are relocateable,
right? I mean, that's how ld will work on .o files made without
-fPIC, no? I guess I don't quite understand how other platforms have
been able to duplicate the relocation functionality of ld in dlopen
for non-fpic objects, but that on hppa, (and also possibly mips?),
this cannot be done?
> > In either case, I will need a knowledgeable hppa person to advise,
> > discuss and help generate patches for this to get fixed any time soon.
> > Gcl can build its own bfd library, so patches here can be simply
> > incorporated.
> willy would be a good target. I'm going to be out of town for a couple
> of weeks, but (if it's still pending) I'd be happy to help when I get
Wonderful! Anyone have a contact address?
Camm Maguire firstname.lastname@example.org
"The earth is but one country, and mankind its citizens." -- Baha'u'llah