src/libdlna.so: undefined reference to `av_find_stream_info'
src/libdlna.so: undefined reference to `av_close_input_file'
collect2: error: ld returned 1 exit status
Makefile:36: recipe for target 'test-libdlna' failed
make[3]: *** [test-libdlna] Error 1
make[3]: Leaving directory '/home/rpjday/openwrt/archer_c7/git/build_dir/target-mips_34kc_uClibc-0.9.33.2/libdlna-0.2.4'
Makefile:81: recipe for target '/home/rpjday/openwrt/archer_c7/git/build_dir/target-mips_34kc_uClibc-0.9.33.2/libdlna-0.2.4/.built' failed
make[2]: *** [/home/rpjday/openwrt/archer_c7/git/build_dir/target-mips_34kc_uClibc-0.9.33.2/libdlna-0.2.4/.built] Error 2
make[2]: Leaving directory '/home/rpjday/openwrt/archer_c7/git/feeds/oldpackages/libs/libdlna'
package/Makefile:174: recipe for target 'package/feeds/oldpackages/libdlna/compile' failed
make[1]: *** [package/feeds/oldpackages/libdlna/compile] Error 2
make[1]: Leaving directory '/home/rpjday/openwrt/archer_c7/git'
/home/rpjday/openwrt/archer_c7/git/include/toplevel.mk:173: recipe for target 'package/libdlna/compile' failed
make: *** [package/libdlna/compile] Error 2

Deselect:

• luci-add-ushare

• ushare

• dlna

Since both libdlna and ushare are discontinued by the developer and no longer maintained, I would suggest you use minidlna instead. If that is not satisfactory, then someone needs to volunteer to move these packages to the active Github repo, take ownership of the maintenance and bring them up-to-date.

I also recommend these packages be moved to the packages-abandoned repo.