[vlc-devel] Building VLC for Windows

[Kaarlo Räihä]

2012/2/4 Rafaël Carré <funman at videolan.org>

> Le 2012-02-03 19:04, Rafaël Carré a écrit :
> > vlc | branch: master | Rafaël Carré <funman at videolan.org> | Thu Feb  2
> 18:23:20 2012 -0500| [521f40906c11615b9da6fabb19870724b91769fb] |
> committer: Rafaël Carré
> >
> > contrib: detect mingw-w64 (as opposed to mingw.org)
>
> Hello,
>
> I want to explain what is going on with all the mingw changes.
>
>
> Q. What is Mingw?
> A. Mingw is a set of headers and libraries which mimic the Windows SDK,
> and let people build applications for Windows without Windows.
> It's the equivalent of glibc for Linux.
>
> Q. What is mingw.org?
> A. Often called "mingw32", it's the first project which shipped such
> libraries and headers, targetting Windows/i386.
> On Debian it's installed in /usr/i586-mingw32msvc
> See http://www.mingw.org/
>
> Q. What is mingw-w64?
> A. It's a fork of mingw.org which adds Win64 compatibility (targetting
> x86_64), but keeps Win32 compatibility.
> On Debian it's installed in /usr/x86_64-w64-mingw32 and
> /usr/i686-w64-mingw32.
> See http://mingw-w64.sourceforge.net/
>
> Q. What does VLC build with?
> A. It was always built with mingw.org
> See http://wiki.videolan.org/Win32Compile
>
>
>
> So to build VLC with mingw.org you need:
>        gcc built for i586-ming32msvc target (available as gcc-mingw32 in
> debian, which is gcc 4.4)
>        binutils built for i586-mingw32msvc target (available as
> mingw32-binutils in debian, which is binutils 2.20)
>        mingw.org >= 3.15 (only 3.13 is available in debian, you can get a
> more
> recent package on http://people.videolan.org/~jb/debian/ , or get 3.15
> from Ubuntu).
>        directx, directshow, direct2d, and dxva2api headers which are absent
> from mingw.org (that is taken care by the contrib)
>
>
>
> If you want to use mingw-w64 (for either 32bits or 64bits), you need:
>        gcc built for your target (debian has gcc-mingw-w64 which is gcc
> 4.6.2)
>        binutils built for your target (debian has binutils-mingw-w64 which
> depends on both targets)
>        mingw-w64 built for your target.
>
>
> So which version of mingw-w64 works with VLC ? Let's see....
>
> <= 2.0.0 has a #define printf __mingw_printf which breaks printf format
> attribute and C++ using printf as a name for class members, so it can
> not be used to build Qt4.
>
> 2.0.1 has fixes for printf functions, but a bug in the definition of
> asprintf will make VLC crash at runtime.
>
> 2.0.1+svn4784-1 available in Debian works, but
> include/sdks/_mingw_directx.h incorrectly states that DirectX SDK is not
> available while it is; you can change the #if 0 into #if 1 into that file.
>
> I was recently given commit access to mingw-w64 and I have been
> contributing fixes for those issues.
>
>
> What remains to be done:
> - Fix the availability of DirectX SDK in header
> - Fix ID2D1HwndRenderTarget interface (d2d1.h in Debian's version is not
> detected by VLC due to using C++ syntax, which is fixed already)
>
> When that 2 changes will be done, 3.0 and 2.0.2 will be the first
> versions of mingw-w64 able to build VLC out of the box (and without
> using external headers).
>
> You can find automated builds for both 32/64 bits target, and for Linux
> i386/amd64 / Windows (presumably 32bits) and OSX (presumably i386) on:
>
> http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Automated%20Builds/
>
> http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Automated%20Builds/
>
> However I don't know the schedule for rebuild.
>
>
If this workflow works with Debian netinst, I could do Wiki tutorial for
virtual machine compile since build from Windows seems somewhat error prone
for new developers.


>
>
> So you can continue to use mingw.org without worrying, and if you have a
> question about mingw-w64 I will be glad to answer.
>
>
> In the meantime I advise to use debian sid versions of mingw-w64, and
> fix /usr/*/include/sdks/_mingw_directx.h . I will speak soon with the
> package maintainer to have a fixed version.
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