[vlc-devel] report from the Win32 front

Rafaël Carré funman at videolan.org
Sun Jan 29 22:14:07 CET 2012

Le 2012-01-29 14:31, Jean-Baptiste Kempf a écrit :
> On Sun, Jan 29, 2012 at 08:14:25PM +0100, John Freed wrote :
>> 1) upgrading to Qt 4.8
>> Fedora 16 uses Qt 4.8. I had hoped I could fool MOC into using the 4.7.4
>> libs, but failed.

You could build contribs from source to fix that, or take the moc 4.7.4
binary from debian.

>> Not wanting to downgrade to Qt 4.7 (essentially moving
>> back to Fedora 15) and too lazy to use a virtual machine, I upgraded my
>> contribs to Qt 4.8. I figured VLC will eventually move there anyhow, so why
>> not try? The good news is, this required only a couple of tiny patches to
>> work. I'll be happy to submit if you want.
> We will move to Qt 4.8 eventually, but, I would prefer to avoid .0
> releases of Qt, because of the issual issue we have in those releases.

We can accept or look at the patches anyway, so please send them

>> 2) building using Mingw32 under Fedora
>> It was necessary to
>> set PKG_CONFIG_LIBDIR=../contrib/i686-pc-mingw32/lib/pkgconfig for building
>> both the vlc.exe binary and the installation package. I'll note that in the
>> Fedora build wiki page.
> Cool.

Strange, configure should do that already

>> 3) building the win32 installation package.
>> Even with the correct PKG_CONFIG_LIBDIR, "make package-win-common"
>> complained that it could not find LIBVLC. I'm guessing there is some
>> interim problem with the build process 

>> or there is a workaround used on the buildbot machine.

Nope there's none

>> ONE final problem, that's finding the two files libstdc++-6.dll and
>> libgcc_s_sjlj-1.dll
>> The file Makefile.in in the build root directory uses this formula to find
>> them:
>> gcc_lib_dir=`$(CXX) -v /dev/null 2>&1 | grep ^LIBRARY_PATH|cut -d= -f2|cut
>> -d: -f1`
>> A couple of observations: 1) the current nightly builds don't include those
>> files, so I suspect they're not being found even by the VLC buildbots, 

The win64 one has them (uses different compiler)

>> 2) that formula does not produce the location specified in Fedora.

What does it give? Where are the DLLs (if they are here) ?

> You should not use those dlls at all for VLC. They give a lot of
> problems and headaches when releasing and when using libVLC application.
> The NB do not have it, because this is statically linked, as it should.

When I asked mingw-w64 developers about it they gave me good reasons to
not use C++ static linking (with exceptions?).

I don't remember them at the moment but either:

- it's a mingw-w64 specific problem
- you don't know what you're talking about
- debian mingw-w64 package is buggy and/or we need to force auto* to
link statically
- probably other options

No idea which one it is but input is welcome.

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