build gcc7.1 in wsl

I get the following error after the make:

make[2]: Leaving directory '/home/kenbloom0303/build'
Makefile:26035: recipe for target 'stage1-bubble' failed
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory '/home/kenbloom0303/build'
Makefile:941: recipe for target 'all' failed
make: *** [all] Error 2

Any ideas where I should look for the error?