gold work on mingw/mingw64 support

[Vladimir Simonov]

On 01/04/2011 08:35 PM, Ian Lance Taylor wrote:
> Vladimir Simonov<sv@sw.ru>  writes:
>
>> IMO mremap.c, pread.c, etc. are a kind of such library.
>> Analysis of target OS capabilities is overkill here, we
>> know in advance - mingw doesn't have mmap and most probably
>> won't have it.
>
> Sure, but there are other systems that also don't have mmap.  We don't
> want to test for all of them.
>
>> If __MINGW32__ looks too OS specific it may be
>> replaced with HAVE_NO_MMAP, HAVE_NO_CLOEXEC defined
>> in config/mh-mingw. Really __MINGW32__ looks quite strange
>> in the middle of descriptors.cc but I don't know how to do it
>> better - fake function in mremap.h would be also strange,
>> new fcntl.c - the same...
>
> I'm complaining in part about the __MINGW32__ and in part about the
> #ifdef.  Apart from ENABLE_THREADS, the only #ifdefs in gold are very
> small ones at the top of a few .cc files.  Let's keep it that way.
>
> Ian
>

OK. Here is a version without __MINGW32__, with sys/mman.h and mmap
function presence detection and new mmap.h/mmap.c.
It is larger but should satisfy you requirements.
Could you comment?

Best regards
Vladimir Simonov
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