Enter in your openwrt/package/ or other
git clone https://github.com/sbwml/openwrt-qBittorrent
make menuconfig # choose LUCI -> Applications -> luci-app-qbittorrent
make V=s
qBittorrent master branch requires GCC11 or update version. If the GCC version is too low, you can use the 4.4.5 branches.
Makefile