[FFmpeg-devel] [PATCH] define _BSD_SOURCE for bktr.c

[Reimar Döffinger]

On Sat, Dec 13, 2008 at 12:46:56PM +0100, Diego Biurrun wrote:
> patch-configure: I merged some more parts, the rest needs an explanation.

I can explain with the rpath-link stuff is removed: BSD linker is
somehow marvelously behaving differently, ldd ffmpeg results in this:
ffmpeg:
        Start    End      Type Open Ref GrpRef Name
        1c000000 3c00b000 exe  1    0   0      ffmpeg
        0170a000 2170e000 rlib 0    1   0      /home/reimar/fate/build/install-directory/lib/libavfilter.so
        02dc9000 22dcd000 rlib 0    1   0      /home/reimar/fate/build/install-directory/lib/libpostproc.so
        0c6c2000 2c6c7000 rlib 0    1   0      /home/reimar/fate/build/install-directory/lib/libswscale.so
        0d704000 2d708000 rlib 0    1   0      /home/reimar/fate/build/install-directory/lib/libavdevice.so
        040a5000 2410a000 rlib 0    1   0      /home/reimar/fate/build/install-directory/lib/libavformat.so
        0da47000 2ddca000 rlib 0    1   0      /home/reimar/fate/build/install-directory/lib/libavcodec.so
        0356f000 23576000 rlib 0    1   0      /home/reimar/fate/build/install-directory/lib/libavutil.so
        06ad0000 26ad8000 rlib 0    8   0      /usr/lib/libm.so.3.0
        0534c000 25382000 rlib 0    1   0      /usr/lib/libc.so.48.0
        08192000 28515000 rlib 0    4   0      libavcodec/libavcodec.so
        0d031000 2d038000 rlib 0    8   0      libavutil/libavutil.so
        0294e000 229b3000 rlib 0    1   0      libavformat/libavformat.so
        04ccb000 24ccf000 rlib 0    1   0      /usr/lib/libossaudio.so.3.1
        010f1000 210f9000 rlib 0    6   0      /usr/lib/libz.so.4.1
        02c5c000 02c5c000 rtld 0    1   0      /usr/libexec/ld.so

As you can see, libav* is linked twice: once with the correct install
path (/home/reimar/fate/build/install-directory/lib) and once with the
incorrect relative path, thus it no longer works after installation.
This is probably related to these while linking ffmpeg:
/usr/bin/ld: warning: libavcodec/libavcodec.so, needed by /home/reimar/fate/build/libavfilter/libavfilter.so, not found (try using -rpath or -rpath-link)
This seems to be cause by the following in the command line that e.g.
generates libavformat.so:
libavcodec/libavcodec.so libavutil/libavutil.so -lavcodec -lavutil
Is there any reason for the former ones?
So far I wasn't even able to find out where exactly that command is
generated...

Greetings,
Reimar D?ffinger