Re: [PATCH][4.8][4.7][4.6] Make -shared-libgcc the default on Cygwin.

[Richard Biener <richard.guenther@gmail.com>]

On Tue, Mar 12, 2013 at 2:44 AM, Dave Korn <dave.korn.cygwin@gmail.com> wrote:
>
>     Hello list,
>
>   The attached patch makes -shared-libgcc the default for Cygwin.  This is
> something that I should have done some time ago, as shared libgcc on Cygwin is
> more than mature.  What's more, it is vital for reliable compilation of
> applications that throw exceptions or share TLS variables from DLLs into the
> main executable; at present these compile incorrectly without an explicit
> -shared-libgcc.  For instance, the just-released MPFR-3.1.2 doesn't work
> without it.
>
>   Given that it's a very simple tweak to the compiler specs on a single
> platform only, I would like to use my target maintainer's discretion to apply
> it even at this late stage, but I figure it's so close to RC1 that I should
> ask the RM's permission anyway.
>
>   I'd also like to backport it to all the currently-open branches.
>
> gcc/ChangeLog
>
> 2013-03-12  Dave Korn  <dave.korn.cygwin@....>
>
>         * config/i386/cygwin.h (SHARED_LIBGCC_SPEC): Make shared libgcc the
>         default setting.
>
>   Is this OK by everyone?

Ok for trunk (4.8).  Please add a documentation entry to gcc-4.8/changes.html.

I'm not sure whether this kind of stuff should change on a release branch,
I'll defer to others for this.  Still, if you backport it, add a
gcc-4.x/changes.html
item to the sub-release sections.

Richard.

>     cheers,
>       DaveK
>
>
>