[m-rev.] for post-commit review: mingw cross compiler on Mac OS X

[Peter Wang]

On Tue, 10 Jan 2012 01:48:15 +1100 (EST), Julien Fischer <juliensf at csse.unimelb.edu.au> wrote:
> 
> For post-commit review by Peter Wang.
> 
> (I will update the README file once this works.  At the moment there
> appear to be other issues involving pthreads that prevent it working.)
> 
> Branches: main
> 
> A step towards getting compilation with the MacPorts version of the MinGW cross
> compiler working on Mac OS X.  It's not clear that this is terribly useful as
> the version of mingw-gcc in MacPorts is ancient (3.4.5).  (I will also try 
> using the nognu port, maybe that is more recent.)
> 
> configure.in:
>  	When checking whether the Mercury compiler is up-to-date, pass options
>  	appropriate to the build compiler, not the host one.  This avoids
>  	problems where the build Mercury compiler doesn't support --linkage
>  	static but the host one does.
> 
>  	Use AC_CHECK_TOOL to check for ar in the non-MSVC case.  This means
>  	the correct host type prefix will get attached when cross compiling.
>          (The prefix is for MacPorts mingw-gcc is not a standard host triplet,
>          it's simply i386-mingw.)

Looks okay.

Peter
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