multimedia/x264

[[LoN]Kamikaze]

I cannot build it, no matter which options or compiler I use. The error
is always the same:

gcc41 -o x264 x264.o matroska.o muxers.o libx264.a -lm  -L/usr/local/lib
-L/usr/X11R6/lib -lgpac_static -s
muxers.o(.text+0x795): In function `.L81':
: undefined reference to `gf_list_add'
muxers.o(.text+0x89c): In function `.L82':
: undefined reference to `gf_list_add'
/usr/local/lib/libgpac_static.a(avc_ext.o)(.text+0x42a): In function
`avcc_Size':
...

and it goes on with undefined reference errors. It seems like the gpac
headers are not found, but I don't know how to resolve this.