Checking if your kit is complete...
Looks good
Note (probably harmless): No library found for -lm
Note (probably harmless): No library found for -leth
Where is your libeth source tree?  
ERROR from evaluation of C:\cpanrun\depot\main\contrib-patched\perl\CPAN\src\Convert-Ethiopic\xs/Makefile.PL: Build aborted, the libeth headers are required for the Convert::Ethiopic package. at ./Makefile.PL line 10.