[patch bfd]: Add further support for x86_64 mingw

[Pedro Alves]

Brian Dessent wrote:

> Is _WIN32 really the right thing to predicate this on?  For example
> someone using Cygwin and also using the w32api directly (by #include
> <windows.h>) will have _WIN32 defined, but they aren't using MSVCRT and
> so I64x is wrong.  Admittedly this is probably not something that is
> likely to occur in bfd, and I know this is a common idiom, but why not
> conditionalize it on __MSVCRT__ instead?  MinGW gcc defines this as a
> builtin right next to _WIN32 but it is not overloaded with the meaning
> of "I'm using the Windows headers."
> 

__MSVCRT__ is defined if using the the msvcrt.dll runtime.  If using the
old crtdll runtime it is __CRTDLL__ (gcc/config/crtdll.h).  For Windows
CE, it is coredll.dll, so it is __COREDLL__ that gets defined.

Isn't it usual to do:
#if defined (_WIN32) && !defined (__CYGWIN__)

or:
#ifdef __MINGW32__
?

-- 
Pedro Alves