gcc -m64 for Solaris10 x86

[Rainer Orth]

Guenter Feldmann <fld@informatik.uni-bremen.de> writes:

> could any one explain what is needed to enable the 64-bit mode in
> gcc for Solaris10 x86?
> 
> I tried 
>  configure  ... amd64-pc-solaris2.10
> and
>  configure  ... x86_64-pc-solaris2.10
> 
> in both cases  
>  make bootstrap 
> ended up in:
> 
> > [ ... ]
> > checking for .preinit_array/.init_array/.fini_array support... no
> > checking if mkdir takes one argument... no
> > *** Configuration x86_64-pc-solaris2.10 not supported

Nothing: just bootstrap on Solaris 10/x86 without specifying a specific
configuration triplet.  The resulting compiler will automatically support
amd64 code generation when specifying the -m64 option.  Note however that
you need to use a recent version of GNU as (from CVS binutils) for the
bootstrap to succeed.  You'll probably have to restrict yourself to C at
the moment: the 64-bit libstdc++ didn't build (at least as of a week ago).
Besides, there may be code generation bugs on mainline: building a 64-bit
lsof some time ago seems to have produced wrong code (though I haven't
investigate this in detail yet).

You may be better off with a modified version of GCC 3.4.3 from the
csl-sol210-3_4-branch branch documented in

	http://gcc.gnu.org/cvs.html

at the moment.  This compiler will be included in Solaris 10 build 73
(probably the next release of Solaris Express), btw.

	Rainer

-- 
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Rainer Orth, Faculty of Technology, Bielefeld University