[Bug bootstrap/41771] Bootstrap with Sun Studio 12.1 fails

[ro at techfak dot uni-bielefeld dot de]

------- Comment #6 from ro at techfak dot uni-bielefeld dot de  2009-10-22 17:09 -------
Subject: Re:  Bootstrap with Sun Studio 12.1 fails

> ------- Comment #5 from ghazi at gcc dot gnu dot org  2009-10-21 19:51 -------
> (In reply to comment #3)
> > > (Also, you don't mention what version of gmp you were using.)
> > Right, sorry: I've tried this with the latest version, gmp 4.3.1.
> 
> Okay I checked gmp source tarballs, and it looks like the SUNPRO clauses
> defining __GMP_EXTERN_INLINE were added specifically in gmp-4.3.1.  I don't see
> them in gmp-4.2.4 or gmp-4.3.0.  Could you please verify bootstrapping gcc with
> those two versions of gmp plus Sun's cc to see if they work?  If it does we
> should offer it as a workaround for users until we figure out how we want to
> solve this long-term.

I've only tried with gmp 4.3.0, but this works on i386-pc-solaris2.10.  So
for the moment, we have a workaround.

> Recommending other versions of gmp as a workaround is helpful even if we hack
> up a patch to GCC, because gcc-4.3 and 4.4 will not see these "fixes" until
> some months in the future when we do another release.  Alternatively we may end
> up recommending to the gmp maintainer(s) that they fix the problem in their
> package since that's what's really broken IMHO.  Either way, it would be
> helpful to know whether using other versions of gmp would help.

I'm not sure we can claim there is GMP breakage at all: they could argue
that anyone including <gmp.h> can be expected to link with -lgmp as well.
I just don't know if it is correct to assume that a function defined as
extern inline in a header will not be emitted in the object file.

Even so, there is breakage in GCC as well:

* ansidecl.h has a broken test for C99, and incorrectly assumes Sun cc
  doesn't support extern inline.  The define from inline to nothing causes
  part of the problem.

* Three files in the gcc directory declared extern inline call static
  functions, which causes Sun Studio cc to error out (cf. the attached
  diff).

        Rainer


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41771