Comment # 4 on bug 1228396 from Stefan Hundhammer

Please also notice that the problem might also be in the build setup. Normally,
there is a "configure" step that checks the build environment at runtime: Which
compiler is available, if all needed libraries are present, where any auxiliary
tools are (e.g. 'install').

I don't see any such step in your build log. Is there really none? Or did you
maybe simply reuse an existing build from a previous Linux installation? For
building software on a new Linux, it is highly recommended to start from
scratch; i.e. execute a "make clean" as the first step, then do the "configure"
step again, and then build.

In most build environments, most of that should work automatically; depending
on what build tools they used (GNU autotools? CMake?). If it's a hand-crafted
Makefile, that may or may not be available; in that case, you'd have to do more
things manually.

This is where you need to read the documentation carefully, or ask in an
OpenWRT user forum.