Re: Fwd: Windows support dropped from gcc trunk

[Tim Prince <tprince818.tp@gmail.com>]

On 10/14/2015 11:36 AM, Steve Kargl wrote:
> On Wed, Oct 14, 2015 at 11:32:52AM -0400, Tim Prince wrote:
>> Sorry if someone sees this multiple times; I think it may have been
>> stopped by ISP or text mode filtering:
>>
>> Since Sept. 26, the partial support for Windows 64-bit has been dropped
>> from gcc trunk:
>> winnt.c apparently has problems with seh, which prevent bootstrapping,
>> and prevent the new gcc from building libraries.
>> libgfortran build throws a fatal error on account of lack of support for
>> __float128, even if a working gcc is used.
>> I didn't see any notification about this; maybe it wasn't a consensus
>> decision?
>> There are satisfactory pre-built gfortran 5.2 compilers (including
>> libgomp, although that is off by default and the testsuite wants acc as
>> well as OpenMP) available in cygwin64 (test version) and (apparently)
>> mingw-64.
>>
> The last comment to winnt.c is
>
> 2015-10-02  Kai Tietz  <ktietz70@googlemail.com>
>
>         PR target/51726
>         * config/i386/winnt.c (ix86_handle_selectany_attribute): Handle
>         selectany within this function without need to keep attribute.
>         (i386_pe_encode_section_info): Remove selectany-code.
>
> Perhaps, contact Kai.
>
> I added gcc@gcc.gnu.org as this technically isn't a Fortran issue.
test suite reports hundred of new ICE instances, all referring to this
seh_unwind_emit function:

/cygdrive/c/users/tim/tim/tim/src/gnu/gcc1/gcc/testsuite/gcc.c-torture/compile/20000127-1.c:
In function 'foo':^M
/cygdrive/c/users/tim/tim/tim/src/gnu/gcc1/gcc/testsuite/gcc.c-torture/compile/20000127-1.c:7:1:
internal compiler error: in i386_pe_seh_unwind_emit, at
config/i386/winnt.c:1137^M
Please submit a full bug report,^M
I will file a bugzila if that is what is wanted, but I wanted to know if
there is a new configure option required.
As far as I know there were always problems with long double for Windows
targets, but the refusal of libgfortran to build on account of it is new.
Thanks,
Tim