Re: [PATCH] Enforce GMP/MPFR version requires and fix fortran/28276,27021

[Steve Kargl <sgk at troutmask dot apl dot washington dot edu>]

On Tue, Sep 12, 2006 at 02:20:27PM -0700, Steve Kargl wrote:
> The attached patch has been tested on amd64-*-freebsd, and it
> should only impact gfortran.  However, the patch does touch
> the toplevel configure.in, and hence, configure.
> 
> markm, I cc'd you because of the pending branching of 4.2 and
> the fact I touch configure.in.  If you prefer that I hold the
> patch until after the branching, I can do so.
> 
> The patch causes configure to check that the version of 
> GMP is 4.1 or newer and that MPFR is version 2.2.0 or
> newer.  For older versions of GMP, configure will die.
> For older versions of MPFR, configure simply checks that
> any version of MPFR is available.  If no version of
> MPFR is available, configure will die.  If an older version
> of MPFR is found, it will be used; however, several known
> problems with older MPFRs prevent the bug fixes for PR
> fortran/28276 and fortran/27021 from functioning (ie.,
> the old buggy gfortran code is still used).
> 
> This patch also removes the local hacks for handling subnormal
> numbers and the folding of atan2().  Again, if an older version
> of MPFR is found, the old buggy gfortran code is used.
> 
> 2006-09-12  Steven G. Kargl  <kargl@gcc.gnu.org>
> 
> 	* configure.in: Check for GMP 4.1 or newer.  Check for MPFR 2.2.0 
> 	or newer.
> 	* configure: Regenerated.
> 	* doc/install.texi: Document required versions of GMP and MPFR.
> 	* fortran/arith.c (arctangent2): Conditionally include code.
> 	(gfc_check_real_range): Use mpfr_subnormalize in preference to local
> 	hack.
> 	* fortran/simplify.c: Wrap Copyright to new line.
> 	(gfc_simplify_atan2): Use mpfr_atan2 in preference to arctangent2().
>         (gfc_simplify_log): Ditto.
> 
> 
> 	PR fortran/28276
> 	* fortran/simplify.c (gfc_simplify_exponent): Use mpfr_get_exp in
> 	preference to broken local hack.
> 	* fortran/trans-intrinsic.c (gfc_get_intrinsic_lib_fndecl): Append
> 	l for long double functions.
> 
> 	PR fortran/27021
> 	* fortran/simplify.c (gfc_simplify_nearest): Use mpfr_nexttoward and
> 	mpfr_subnormalize to handle numbers near zero in preference to broken
> 	 local hack.
> 
> 	PR fortran/28276
> 	* testsuite/gfortran.dg/exponent_1.f90: New test.
> 
> 	PR fortran/27021
> 	* testsuite/gfortran.dg/nearest_1.f90: New test.
> 

Committed to trunk.

-- 
Steve