[Linker error] undefined reference to `mysql_init@4' [Linker error] undefined reference to `mysql_query@8' [Linker error] undefined reference to `mysql_use_result@4' ...

/usr/bin/ld: libavfilter/libavfilter.a(vf_scale_rga.o): in function scale_rga_filter_frame_l': /home/toybrick/livefoundation/submodules/ffmpeg-rk/libavfilter/vf_scale ...

/usr/bin/ld: /usr/lib/libavcodec.a(rkmppdec.o): in function rkmpp_decode_init': /home/firefly/dev/ffmpeg/libavcodec/rkmppdec.c:226: undefined reference to querystring ...