Yasm working with Win32

[Simon Marlow]

Peter Tanski wrote:
> On Dec 15, 2006, at 4:19 AM, Simon Marlow wrote:
>> For the native Windows port, we should have a new target, probably
>> i386-unknown-win32 or i386-unknown-windows.  Then we can have an
>> option in config.mk to control whether YASM is used, $(UseYASM),
>> which would be on by default for windows_TARGET_OS.  Later we might
>> want to make it a configure option, but for now I'd leave it as a
>> build.mk option.
>
> Right on.  Would it be good to consolidate the hard-coded build flags
> into one module, i.e., wired-in flags in DriverPipeline.hs should be
> brought together in DynFlags.hs?

Sounds reaonsable.

> To sum up:
>   * new target: i386-unknown-windows (Yasm covers Win64,
> Intel and AMD)

I imagine a Win64 build will look like x86_64-unknown-windows (if/when we support it; cygwin doesn't support Win64 yet, so we don't have a build system).  I don't think it's necessary to change the OS to be -win64, but I could be wrong.

>   * windows_TARGET_OS (new cpp define)

You'll get the CPP defines automatically when you tell configure about the i386-unknown-windows target.  Note that there are *lots* of #ifdef mingw32_blah_blah that around the system that will need to change, it's probably a good idea to grep and look at each one individually.

> Other things may need changing:
>   * add code to DriverPhases.hs to allow ".asm" suffix?  (Not
> necessary)

Don't see why not, if it's easy.

>   * SysTools.lhs:328-329 (as-prog,as-args) are NOT (gcc_prog,gcc_args)

sure

>   * (potential bugger): remove default use of mangler on -O and -fvia-
> C on -fglasgow-exts;

Don't understand this one.  -fvia-C won't be available for i386-unknown-windows, right?  What are you referring to with -fglasgow-exts?

> Yasm chokes on /ARGS, /NO_ARGS gas directives,
> may add to Yasm with special -D macro[=value] options

Could you elaborate?  I don't know what /ARGS is.

Cheers,
        Simon