[libav-tools] cross compile problem with yasm

Farkas Levente lfarkas at lfarkas.org
Mon Aug 1 16:36:30 CEST 2011


On 08/01/2011 02:55 PM, Luca Barbato wrote:
> On 8/1/11 1:48 PM, Farkas Levente wrote:
>> On 08/01/2011 12:45 PM, Luca Barbato wrote:
>>> On 8/1/11 11:56 AM, Farkas Levente wrote:
>>>> hi,
>>>> i try to build on linux with mingw64 toolchain the gstreamer packages.
>>>> all build and working fine except gst-ffmpeg. gst-ffmpeg inlude
>>>> libav as
>>>> it's backend. when i try build it on linux with mingw than i use yasm.
>>>> it compile and build without any kind of error, but when i try to
>>>> use it
>>>> seg fault immediately.
>>>
>>> The backtrace isn't much meaningful, please get gdb to point the
>>> sources. We have mingw64 builds on win32.libav.org could you please try
>>> those and see if ffplay can decode correctly your testfile?
> qlist -Iv yasm mingw
> cross-i686-w64-mingw32/binutils-2.21
> cross-i686-w64-mingw32/gcc-4.5.2
> cross-i686-w64-mingw32/mingw64-runtime-20101003
> cross-mingw32/binutils-2.21
> cross-mingw32/gcc-4.5.2
> cross-mingw32/mingw-runtime-3.18
> cross-mingw32/w32api-3.15
> cross-x86_64-w64-mingw32/binutils-2.21
> cross-x86_64-w64-mingw32/gcc-4.5.2
> cross-x86_64-w64-mingw32/mingw64-runtime-20101003
> dev-lang/yasm-1.1.0-r1
> 
> Those are my versions for the toolchains not sure how much it helps.

not too much.
now i try to build a standalone libav. here are a few of my thoughts:
- it'd be good if configure can except (or ext least don't generate
error on default arguments like:
--host=i686-w64-mingw32
--exec-prefix=/usr/i686-w64-mingw32/sys-root/mingw
etc.

- it has no real reason to generate symlink in case of cross compile,
since on windows it's not working:
avcodec-53.dll -> avcodec-53.5.0.dll
but in this case may be name it avcodec-53.dll would be better then
avcodec-53.5.0.dll otherwise the exe can't find the dlls.

i'm still trying to make a working version...

-- 
  Levente                               "Si vis pacem para bellum!"


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