How to solve Cannot satisfy the following dependencies?

Collected errors:
 * satisfy_dependencies_for: Cannot satisfy the following dependencies for helloworld:
 *      librt * 
 * opkg_install_cmd: Cannot install package helloworld.

my openwrt can not be online , so cant intall librt by opkg

Download the package manually:

1 Like

thanks! in fact i have installed the so library by cp, but install it need by no_deps