On Mon, Jan 28, 2013 at 9:14 PM, Leif Ekblad <leif@rdos.net> wrote:

>>> That is intentional. The gthr-rdos.h file is part of libgcc. My intention
>>> was to first patch gcc, then update the patches for newlib, and finally
>>> libgcc. The gthr-rdos.h file would reference include-files part of
>>> newlib,
>>> so this is kind of circular. I also cannot define the thread model for
>>> RDOS
>>> unless I define this file.
>>>
>>> I see a couple of possible solutions:
>>> 1. Keep as is. You cannot build libgcc at the current stage anyway, and
>>> the
>>> bootstrap must be built without threading
>>> 2. Add an empty gthr-rdos.h file until libgcc is done
>>> 3. Remove the threading-model for now, and add it with libgcc instead.
>>
>>
>> I propose option 3.
>>
>> Is it enough to remove gthr.m4 change from the patch in this case?
>
> Yes, for all practical purposes. There is a reference to thread-file in
> config.gcc, when threading is enabled, which doesn't work for bootstrapping
> the compiler anyway.

Thanks for pointing it, I have also removed this reference.

Attached is the patch that has been committed to SVN. I have added
missing licence headers to new files and clean whitespace a bit.

2013-01-28  Leif Ekblad  <leif@rdos.net>

	* config.gcc (i[34567]86-*-rdos*, x86_64-*-rdos*): New targets.
	* config/i386/i386.h (TARGET_RDOS): New macro.
	(DEFAULT_LARGE_SECTION_THRESHOLD): New macro.
	* config/i386/i386.c (ix86_option_override_internal): For 64bit
	TARGET_RDOS, set ix86_cmodel to CM_MEDIUM_PIC and flag_pic to 1.
	* config/i386/i386.opt (mlarge-data-threshold): Initialize to
	DEFAULT_LARGE_SECTION_THRESHOLD.
	* config/i386/i386.md (R14_REG, R15_REG): New constants.
	* config/i386/rdos.h: New file.
	* config/i386/rdos64.h: New file.

Thanks,
Uros.