[Ecls-list] Solaris SPARC issues with Sun complier - location of gmp specified.

[Dr. David Kirkby]

Juan Jose Garcia-Ripoll wrote:
> On Sat, Aug 1, 2009 at 11:57 PM, Juan Jose
> Garcia-Ripoll<juanjose.garciaripoll at googlemail.com> wrote:
>> On Sat, Aug 1, 2009 at 11:36 PM, Dr. David
>> Kirkby<david.kirkby at onetel.net> wrote:
>>> Following from my mail half an hour or so ago, here is what happens on
>>> t2 if the Sun compiler is used, but the location of the gmp library and
>>> header files are specified.
>>> Undefined                       first referenced
>>>  symbol                             in file
>>> __gmpn_perfect_square_p             dpp.o
>>> __gmpz_tdiv_q                       dpp.o
>>> __gmpq_set                          dpp.o
>>> __gmpz_set                          dpp.o
>>> __gmpn_add_n                        dpp.o
>>> __gmpn_sub_n                        dpp.o
>>> __gmpn_popcount                     dpp.o
>>> ld: fatal: Symbol referencing errors. No output written to dpp
>>> I've seen very similar error messages about __gmp.... undefined, when
>>> using the GNU compiler too.
>> Yes, I have seen this, and I can not tell what this is about. GMP is
>> not used or referenced in the dpp program at all and those symbols
>> should not be linked in. There must be a problem with the GMP headers
>> and the Solaris versions of the compiler or something like that.
> 
> I found the problem: GMP has inline forms which are being compiled
> always, even if no function from GMP is used. See for instance gmp.h,
> line 1745 (below an exceprt). Somehow GCC is creating references to
> those functions _always_.
> 
> This is absurd for GCC to do, specially since those inline functions
> are not called anywhere in dpp.c Note that even with a hack to prevent
> including gmp.h in dpp.c, the problem persists because one will find
> multiple definitions of the same function.
> 
> I will see whether MPIR has this problem.
> 
> #if defined (__GMP_EXTERN_INLINE) || defined (__GMP_FORCE_mpz_set_q)
> #if ! defined (__GMP_FORCE_mpz_set_q)
> __GMP_EXTERN_INLINE
> #endif
> void
> mpz_set_q (mpz_ptr __gmp_w, mpq_srcptr __gmp_u)
> {
>   mpz_tdiv_q (__gmp_w, mpq_numref (__gmp_u), mpq_denref (__gmp_u));
> }
> #endif

Well done Juanjo.

If by chance MPIR does have the same issue, then we can report that to 
the MPIR developers. Since the MPIR is based on an earlier release of 
GMP, it it not beyond the bounds of possibility this might occur. But at 
least they seem responsive to help requests.

But note the errors I reported here were with the Sun compiler, so it is 
not only gcc.

Dave