[GRASS-dev] NVIZ compile error with missing -lavformat

[Glynn Clements]

Hamish wrote:

> > Compiling NVIZ from SVN trunk, I get following problem:
> ....
> >
> /home/neteler/svngrass/dist.x86_64-unknown-linux-gnu/lib/libgrass_ogsf.so:
> > undefined reference to `guess_format'
> >
> /home/neteler/svngrass/dist.x86_64-unknown-linux-gnu/lib/libgrass_ogsf.so:
> > undefined reference to `av_destruct_packet_nofree'
> ....
> > collect2: ld returned 1 exit status
> > make[1]: *** [nvwish] Error 1
> > make[1]: Leaving directory
> > `/home/neteler/svngrass/visualization/nviz/src'
> > make: *** [default] Error 2
> > 
> > If I manually add -lavformat, the compilation works ok.
> ...
> > Any ideas how to automate that -lavformat is included?
> 
> 
> the new ffmpeg movie format-by-extension code needs libavformat which
> may come in a separate package to libavcodec.
> (libavformat-dev and libavcodec-dev packages on Debian)
> 
> I don't know much about ./config scripts, but the attached is an
> untested cut & paste job which might work. (I don't know about
> -lavutil,..)

>  LOC_CHECK_LIBS(avcodec, avcodec_init, FFMPEG, $FFMPEGLIBPATH, FFMPEGLIB,,,,-lavutil $MATHLIB)
> +LOC_CHECK_LIBS(avformat, av_set_parameters, FFMPEG, $FFMPEGLIBPATH, FFMPEGLIB,,,,-lavutil $MATHLIB)

I initially thought that this would replace FFMPEGLIB, but it will
actually append to it, so it should be okay.

-- 
Glynn Clements <glynn at gclements.plus.com>