make[4]: Entering directory '/build/lede-17.01/slaves/phase2/arm_arm1176jzf-s_vfp/build/sdk/build_dir/target-arm_arm1176jzf-s+vfp_musl-1.1.16_eabi/baresip-0.4.19'
  CC [M]  build-arm/modules/avcodec/avcodec.o
modules/avcodec/avcodec.c:9:32: fatal error: libavcodec/avcodec.h: No such file or directory
compilation terminated.
mk/mod.mk:42: recipe for target 'build-arm/modules/avcodec/avcodec.o' failed
make[4]: *** [build-arm/modules/avcodec/avcodec.o] Error 1
make[4]: Leaving directory '/build/lede-17.01/slaves/phase2/arm_arm1176jzf-s_vfp/build/sdk/build_dir/target-arm_arm1176jzf-s+vfp_musl-1.1.16_eabi/baresip-0.4.19'
Makefile:141: recipe for target '/build/lede-17.01/slaves/phase2/arm_arm1176jzf-s_vfp/build/sdk/build_dir/target-arm_arm1176jzf-s+vfp_musl-1.1.16_eabi/baresip-0.4.19/.built' failed
make[3]: *** [/build/lede-17.01/slaves/phase2/arm_arm1176jzf-s_vfp/build/sdk/build_dir/target-arm_arm1176jzf-s+vfp_musl-1.1.16_eabi/baresip-0.4.19/.built] Error 2