collect2: error: ld returned 1 exit status

[hpng6]

/opt/belledonne-communications/lib/libmediastreamer.so.10: undefined reference to speex_echo_state_blob_new_from_memory' /opt/belledonne-communications/lib/libmediastreamer.so.10: undefined reference tospeex_echo_state_blob_free' /opt/belledonne-communications/lib/libmediastreamer.so.10: undefined reference to speex_echo_state_blob_get_data' /opt/belledonne-communications/lib/libmediastreamer.so.10: undefined reference tospeex_echo_state_blob_get_size' collect2: error: ld returned 1 exit status src/CMakeFiles/flexisip_server.dir/build.make:113: recipe for target 'src/flexisip' failed make[6]: [src/flexisip] Error 1 make[6]: Leaving directory '/root/flexisip/WORK/flexisip/Build/flexisip' CMakeFiles/Makefile2:146: recipe for target 'src/CMakeFiles/flexisip_server.dir/all' failed make[5]: [src/CMakeFiles/flexisip_server.dir/all] Error 2 make[5]: Leaving directory '/root/flexisip/WORK/flexisip/Build/flexisip' Makefile:151: recipe for target 'all' failed make[4]: [all] Error 2 make[4]: Leaving directory '/root/flexisip/WORK/flexisip/Build/flexisip' CMakeFiles/EP_flexisip.dir/build.make:120: recipe for target '/root/flexisip/WORK/flexisip/Stamp/EP_flexisip/EP_flexisip-build' failed make[3]: [/root/flexisip/WORK/flexisip/Stamp/EP_flexisip/EP_flexisip-build] Error 2 make[3]: Leaving directory '/root/flexisip/WORK/flexisip/cmake' CMakeFiles/Makefile2:74: recipe for target 'CMakeFiles/EP_flexisip.dir/all' failed make[2]: [CMakeFiles/EP_flexisip.dir/all] Error 2 make[2]: Leaving directory '/root/flexisip/WORK/flexisip/cmake' Makefile:83: recipe for target 'all' failed make[1]: [all] Error 2 make[1]: Leaving directory '/root/flexisip/WORK/flexisip/cmake' Makefile:14: recipe for target 'flexisip-build' failed make: *** [flexisip-build] Error 2