Hi I want implement G729 codec to my application i found in mailing list this project: http://code.google.com/p/siphon/downloads/list my steps: 1) I apply patch patch-g729.txt from http://code.google.com/p/siphon/downloads/list 2) add code for inicializing g729 codec to pjsua_media.c 3) copy headers + source files from sipphon project http://code.google.com/p/siphon/source/browse/#svn/trunk/g729a to .../third_party/g729 4) run autoconf ./aconfigure.ac > aconfigure 5) run ./configure CFLAGS="-g" --disable-ssl --enable-g729-codec && make dep && make but i suppose the patch is not complete because i get follow error: output/pjsua-i686-pc-linux-gnu/main.o output/pjsua-i686-pc-linux- gnu/pjsua_app.o -L/opt/emtest/compile_386/voip/pjproject-1.5-729/pjlib/lib - L/opt/emtest/compile_386/voip/pjproject-1.5-729/pjlib-util/lib - L/opt/emtest/compile_386/voip/pjproject-1.5-729/pjnath/lib - L/opt/emtest/compile_386/voip/pjproject-1.5-729/pjmedia/lib - L/opt/emtest/compile_386/voip/pjproject-1.5-729/pjsip/lib - L/opt/emtest/compile_386/voip/pjproject-1.5-729/third_party/lib -lpjsua-i686- pc-linux-gnu -lpjsip-ua-i686-pc-linux-gnu -lpjsip-simple-i686-pc-linux-gnu - lpjsip-i686-pc-linux-gnu -lpjmedia-codec-i686-pc-linux-gnu -lpjmedia-i686-pc- linux-gnu -lpjmedia-audiodev-i686-pc-linux-gnu -lpjnath-i686-pc-linux-gnu - lpjlib-util-i686-pc-linux-gnu -lresample-i686-pc-linux-gnu -lmilenage-i686-pc- linux-gnu -lsrtp-i686-pc-linux-gnu -lgsmcodec-i686-pc-linux-gnu -lspeex-i686- pc-linux-gnu -lilbccodec-i686-pc-linux-gnu -lg7221codec-i686-pc-linux-gnu - lportaudio-i686-pc-linux-gnu -lpj-i686-pc-linux-gnu -lm -lnsl -lrt -lpthread /opt/emtest/compile_386/voip/pjproject-1.5-729/pjmedia/lib/libpjmedia-codec- i686-pc-linux-gnu.a(g729.o): In function `g729_open': /opt/emtest/compile_386/voip/pjproject-1.5-729/pjmedia/build/../src/pjmedia- codec/g729.c:422: undefined reference to `g729a_enc_mem_size' /opt/emtest/compile_386/voip/pjproject-1.5-729/pjmedia/build/../src/pjmedia- codec/g729.c:425: undefined reference to `g729a_enc_init' /opt/emtest/compile_386/voip/pjproject-1.5-729/pjmedia/build/../src/pjmedia- codec/g729.c:429: undefined reference to `g729a_dec_mem_size' /opt/emtest/compile_386/voip/pjproject-1.5-729/pjmedia/build/../src/pjmedia- codec/g729.c:432: undefined reference to `g729a_dec_init' /opt/emtest/compile_386/voip/pjproject-1.5-729/pjmedia/lib/libpjmedia-codec- i686-pc-linux-gnu.a(g729.o): In function `g729_close': /opt/emtest/compile_386/voip/pjproject-1.5-729/pjmedia/build/../src/pjmedia- codec/g729.c:447: undefined reference to `g729a_enc_deinit' /opt/emtest/compile_386/voip/pjproject-1.5-729/pjmedia/build/../src/pjmedia- codec/g729.c:448: undefined reference to `g729a_dec_deinit' /opt/emtest/compile_386/voip/pjproject-1.5-729/pjmedia/lib/libpjmedia-codec- i686-pc-linux-gnu.a(g729.o): In function `g729_encode': /opt/emtest/compile_386/voip/pjproject-1.5-729/pjmedia/build/../src/pjmedia- codec/g729.c:548: undefined reference to `g729a_enc_process' /opt/emtest/compile_386/voip/pjproject-1.5-729/pjmedia/lib/libpjmedia-codec- i686-pc-linux-gnu.a(g729.o): In function `g729_decode': /opt/emtest/compile_386/voip/pjproject-1.5-729/pjmedia/build/../src/pjmedia- codec/g729.c:580: undefined reference to `g729a_dec_process' I suppose i have to add Makefile to /third_party/build/g729 and compile all source from codec to libpjmedia-codec but i'm not very familiar with automake mess :) and my question..have somebody "this" makefile? or some other patch?? or is something wrong on my side ? thanks