Question: I got this error while (re)building, using cygwin make.exe version :3.81.

```
Error : *** target pattern contains no `%'.

```

Answer: 
This error is due to a presence of a `":"`. Therefore it no longer supports windows paths. 
You need to download version 3.80 and replace the `make.exe` in the `\bin` directory.

Apparently it needs `cygintl12.dll` too.
In my project, obj folder was probably corrupted and I was getting this error. Manually deleted obj folder. Then ndk-build completed fine.