Hi, we really stuck into a linker error and couldn't get it resolved. Could you please help us: After ./configure, make dep the make raises a linker problem: gcc -o ../bin/pjmedia-test-x86_64-unknown-linux-gnu \ output/pjmedia-test-x86_64-unknown-linux-gnu/vid_dev_test.o output/pjmedia-test-x86_64-unknown-linux-gnu/codec_vectors.o output/pjmedia-test-x86_64-unknown-linux-gnu/jbuf_test.o output/pjmedia-test-x86_64-unknown-linux-gnu/main.o output/pjmedia-test-x86_64-unknown-linux-gnu/mips_test.o output/pjmedia-test-x86_64-unknown-linux-gnu/vid_codec_test.o output/pjmedia-test-x86_64-unknown-linux-gnu/rtp_test.o output/pjmedia-test-x86_64-unknown-linux-gnu/test.o output/pjmedia-test-x86_64-unknown-linux-gnu/sdp_neg_test.o ../lib/libpjmedia-x86_64-unknown-linux-gnu.a ../lib/libpjmedia-audiodev-x86_64-unknown-linux-gnu.a ../lib/libpjmedia-videodev-x86_64-unknown-linux-gnu.a ../lib/libpjmedia-codec-x86_64-unknown-linux-gnu.a /home/fmetz/tmp/pjproject-2.0-dev/pjlib/lib/libpj-x86_64-unknown-linux-gnu.a /home/fmetz/tmp/pjproject-2.0-dev/pjlib-util/lib/libpjlib-util-x86_64-unknown-linux-gnu.a /home/fmetz/tmp/pjproject-2.0-dev/pjnath/lib/libpjnath-x86_64-unknown-linux-gnu.a -L/home/fmetz/tmp/pjproject-2.0-dev/third_party/lib -lresample-x86_64-unknown-linux-gnu -lmilenage-x86_64-unknown-linux-gnu -lsrtp-x86_64-unknown-linux-gnu -lgsmcodec-x86_64-unknown-linux-gnu -lspeex-x86_64-unknown-linux-gnu -lilbccodec-x86_64-unknown-linux-gnu -lg7221codec-x86_64-unknown-linux-gnu -lportaudio-x86_64-unknown-linux-gnu -lm -lnsl -lrt -lpthread -lcrypto -lssl output/pjmedia-test-x86_64-unknown-linux-gnu/vid_codec_test.o: In function `vid_codec_test': vid_codec_test.c:(.text+0x917): undefined reference to `pjmedia_codec_ffmpeg_init' vid_codec_test.c:(.text+0x92b): undefined reference to `pjmedia_codec_ffmpeg_deinit' collect2: ld returned 1 exit status make[2]: *** [../bin/pjmedia-test-x86_64-unknown-linux-gnu] Error 1 make[2]: Leaving directory `/home/fmetz/tmp/pjproject-2.0-dev/pjmedia/build' make[1]: *** [pjmedia-test] Error 2 make[1]: Leaving directory `/home/fmetz/tmp/pjproject-2.0-dev/pjmedia/build' make: *** [all] Error 1 Cheers, Fr?d?ric