[FFmpeg-cvslog] r9281 - trunk/Makefile

Diego Biurrun diego
Sun Jun 17 16:11:04 CEST 2007


On Sat, Jun 16, 2007 at 02:07:54AM +0200, V?ctor Paesa wrote:
> 
> On 6/15/07, Ramiro Ribeiro Polla wrote:
> > V?ctor Paesa wrote:
> > >
> > > On 6/15/07, Diego Biurrun wrote:
> > >
> > >> On Tue, Jun 12, 2007 at 11:24:58AM +0200, V?ctor Paesa wrote:
> > >>
> > >>> On 6/12/07, Diego Biurrun wrote:
> > >>>
> > >>>> On Mon, Jun 11, 2007 at 12:44:58PM -0300, Ramiro Ribeiro Polla wrote:
> > >>>>
> > >>>>> diego wrote:
> > >>>>>
> > >>>>>> Log:
> > >>>>>> The video hooks do not depend on the libav* libraries.
> > >>>>>>
> > >>>>> Actually, while working on vhooks for MinGW, and re-reading V?ctor's two
> > >>>>> month effort to get them working on Cygwin, vhooks do depend on the
> > >>>>> libav* libraries. Since I'm already trying to finish the integration for
> > >>>>> MinGW, I'll see how it can be set conditionally for Windows platforms.
> > >>>>>
> > >>>> It sure compiles standalone here, so I'm very curious to see what you
> > >>>> are talking about.
> > >>>>
> > >>> Broken here on Cygwin:
> > >>>
> > >>> $ ./configure --disable-static --enable-shared --enable-gpl --enable-swscaler
> > >>>
> > >>> $ make
> > >>>
> > > [...]
> > >
> > >
> > >>> gcc -Wl,--warn-common  -rdynamic -export-dynamic
> > >>> -Wl,-rpath-link,"/home/wzrlpy/src/ffmpeg-9284/ffmpeg"/libavcodec
> > >>> -Wl,-rpath-link,"/home/wzrlpy/src/ffmpeg-9284/ffmpeg"/libavformat
> > >>> -Wl,-rpath-link,"/home/wzrlpy/src/ffmpeg-9284/ffmpeg"/libavutil -g -o
> > >>> null.dll -shared -L"/home/wzrlpy/src/ffmpeg-9284/ffmpeg"/libavformat
> > >>> -L"/home/wzrlpy/src/ffmpeg-9284/ffmpeg"/libavcodec
> > >>> -L"/home/wzrlpy/src/ffmpeg-9284/ffmpeg"/libswscale
> > >>> -L"/home/wzrlpy/src/ffmpeg-9284/ffmpeg"/libavutil null.o -lavformat
> > >>> -lavcodec -lswscale -lavutil -lz
> > >>> gcc: unrecognized option `-rdynamic'
> > >>> /usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../i686-pc-cygwin/bin/ld:
> > >>> cannot find -lavformat
> > >>> collect2: ld returned 1 exit status
> > >>> make[1]: *** [null.dll] Error 1
> > >>> rm null.o
> > >>> make[1]: Leaving directory `/home/wzrlpy/src/ffmpeg-9284/ffmpeg/vhook'
> > >>> make: *** [videohook] Error 2
> > >>>
> > >>> Reverting the change fixes the build
> > >>> (with the unapproved llrintf() patch applied, of course).
> > >>>
> > >> Try removing -lavformat from the link command manually.
> > >
> > > I'll give it a try this night, but I doubt it works: ld forbids
> > > undefined references
> > > in shared objects (for PE binaries, for ELF is OK).
> 
> Tried&failed:
> 
> $ gcc -rdynamic -export-dynamic -Wl,--warn-common
> -Wl,-rpath-link,"/home/Inma/src/ffmpeg-9328"/libavcodec
> -Wl,-rpath-link,"/home/Inma/src/ffmpeg-9328"/libavformat
> -Wl,-rpath-link,"/home/Inma/src/ffmpeg-9328"/libavutil -g -o null.dll -shared
> -L"/home/Inma/src/ffmpeg-9328"/libavformat
> -L"/home/Inma/src/ffmpeg-9328"/libavcodec
> -L"/home/Inma/src/ffmpeg-9328"/libswscale
> -L"/home/Inma/src/ffmpeg-9328"/libavutil null.o
> -lavcodec -lswscale -lavutil -lz
> gcc: unrecognized option `-rdynamic'
> /usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../i686-pc-cygwin/bin/ld:
> cannot find -lavcodec
> collect2: ld returned 1 exit status

Of course you need to remove -lavcodec -lswscale -lavutil from the link
command as well ...

Diego




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