[Pixman] Win32 fixes and improvements

[Andrea Canciani]

On Tue, Feb 22, 2011 at 11:07 PM, Andrea Canciani <ranma42 at gmail.com> wrote:
> In order to make pixman more maintainable on windows, having working
> Makefiles for the library and the tests is probably needed. Today I
> took the Makefile attached to
> https://bugs.freedesktop.org/show_bug.cgi?id=33069
> and tried to use it to build but it didn't build all the tests because
> of some incompatibilities between cl and gcc.
>
> The following patches should make it possible to build pixman and the
> entire test suite on Windows from git in a properly configured Cygwin
> environment.
>
> There are some remaining warnings:
>
> c:\cygwin\home\ranma42\code\fdo\pixman\pixman\pixman-mmx.c(317) :
> warning C4799: function 'store8888' has no EMMS instruction
> c:\cygwin\home\ranma42\code\fdo\pixman\pixman\pixman-mmx.c(166) :
> warning C4799: function 'to_uint64' has no EMMS instruction
> c:\cygwin\home\ranma42\code\fdo\pixman\pixman\pixman-mmx.c(437) :
> warning C4799: function 'combine' has no EMMS instruction
>
> These are wanrings about some missing MMX registers cleanup. I don't
> know if this is required or if the compiler just does not notice that
> it is already performed somewhere else.
>
> c:\cygwin\home\ranma42\code\fdo\pixman\test\fetch-test.c(114) :
> warning C4715: 'reader' : not all control paths return a value
> c:\cygwin\home\ranma42\code\fdo\pixman\test\stress-test.c(133) :
> warning C4715: 'real_reader' : not all control paths return a value
> c:\cygwin\home\ranma42\code\fdo\pixman\test\composite.c(431) :
> warning C4715: 'calc_op' : not all control paths return a value
>
> These are non-returning functions (abort() / assert(0)). They can be
> silenced by adding a return after the termination call, if we aim at a
> warning-free build on Windows.
>

I improved the patchset a little (I fixed the library makefile for real
and silenced the test warnings) and pushed it as a git branch here:
http://cgit.freedesktop.org/~ranma42/pixman/log/?h=wip/win32

These are my first step in the win32 build environment, so review
and testing are greatly appreciated.

Andrea