Re: Guile 1.9.14 & GIT version linking errror

[Hans Aberg <haberg-1@telia.com>]

On 16 Jan 2011, at 11:18, Neil Jerram wrote:

>>> ... when I try to install guile-1.9.14, I get the error below (Mac
>>> OS X 10.5.8 PPC G4).
>>>
>>> ld: duplicate symbol ___gmpz_abs in .libs/libguile_2.0_la-arbiters.o
>>> and .libs/libguile_2.0_la-alist.o
>>
>> And I get the same error when using GIT.

> - understand why it is being _defined_ twice, as opposed to just
>  declared

There might be a problem with GMP inlining. A lot of binary files  
match by 'grep -r mpz_abs *', but no source files. The header /usr/ 
local/include/gmp.h has a section inlining (below). The macro  
__GMP_EXTERN_INLINE is turned on by another section:

  /* gcc has __inline__ in all modes, including strict ansi.  Give a  
prototype
     for an inline too, so as to correctly specify "dllimport" on  
windows, in
     case the function is called rather than inlined.
     GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99
     inline semantics, unless -fgnu89-inline is used.  */
#ifdef __GNUC__
#if (defined __GNUC_STDC_INLINE__) || (__GNUC__ == 4 && __GNUC_MINOR__  
== 2)
#define __GMP_EXTERN_INLINE extern __inline__ __attribute__  
((__gnu_inline__))
#else
#define __GMP_EXTERN_INLINE      extern __inline__
#endif
#define __GMP_INLINE_PROTOTYPES  1
#endif

...

/* The following are provided as inlines where possible, but always  
exist as
    library functions too, for binary compatibility.

    Within gmp itself this inlining generally isn't relied on, since it
    doesn't get done for all compilers, whereas if something is worth
    inlining then it's worth arranging always.

    There are two styles of inlining here.  When the same bit of code is
    wanted for the inline as for the library version, then  
__GMP_FORCE_foo
    arranges for that code to be emitted and the __GMP_EXTERN_INLINE
    directive suppressed, eg. mpz_fits_uint_p.  When a different bit  
of code
    is wanted for the inline than for the library version, then
    __GMP_FORCE_foo arranges the inline to be suppressed, eg.  
mpz_abs.  */

#if defined (__GMP_EXTERN_INLINE) && ! defined (__GMP_FORCE_mpz_abs)
__GMP_EXTERN_INLINE void
mpz_abs (mpz_ptr __gmp_w, mpz_srcptr __gmp_u)
{
   if (__gmp_w != __gmp_u)
     mpz_set (__gmp_w, __gmp_u);
   __gmp_w->_mp_size = __GMP_ABS (__gmp_w->_mp_size);
}
#endif