Re: Provide 64-bit default Solaris/x86 configuration (PR target/39150)

[Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>]

Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> writes:

> There has long been some clamoring for a amd64-*-solaris2 configuration
> similar to sparcv9-sun-solaris2.  I've resisted this for quite some
> time, primarily because it doubles the maintenance effort of testing
> both the 32-bit default and 64-bit default configurations.
[...]
> I think practically the whole patch falls under the Solaris
> maintainership, with the possible exception of the change to the copy of
> libtool.m4 in libgo/config.  This is not for the technical content, but
> for the special commit rules to that directory.  Ian?
>  
> Anyway, this part of the patch will have to go to upstream libtool.
> Ralf, could you take care of that?
>
> Bootstrapped without regression on i386-pc-solaris2.10 (both 32-bit
> default and 64-bit default configurations), i386-pc-solaris2.11 and
> sparc-sun-solaris2.11 in progress.
[...]
> Once all the bootstraps have finished, I'll commit this patch (at least
> the non-libgo parts) unless anything unexpected comes up.

All bootstraps have completed without regressions, so I've installed the
patch as is, after verifying that the libgo parts aren't present in the
upstream Go repo.

I've also synced the toplevel configure.ac/configure changes to src.

One other issue: it was suggested that the 64-bit compiler might
actually be faster than a 32-bit one.  At least bootstrap times speak
another language: on a Sun Fire X4450 running Solaris 10 with 4 x 2.93
GHz Quad-Core Xeon Xeon X7350, I find for make -j32 + make -j32 -k check
for both multilibs:

      		64-bit		32-bit

		as/ld

      real     	1:59:28.66	1:52:15.55
      user     	7:14:33.93	6:43:25.84
      sys      	5:26:30.66	4:41:02.78

      		gas/ld

		2:02:47.64	1:54:24.51
		7:10:41.93	6:39:39.39
		5:37:15.86	4:51:41.02

		gas/gld

		1:59:57.13	1:45:13.18
		7:57:37.13	7:11:41.83
		5:11:58.14	4:04:26.97

Same picture on a Sun Fire X4600 M2 running Solaris 11 with 8 x 2.6 GHz
Dual-Core Opteron 8218.

	Rainer

-- 
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University