This allows 'errorformat' to track relative directories when building.
I never had to do that on Linux, does it do that by default? Why doesn't
Mac OS?
set wildignore+=*.pyc " Python byte code
set wildignore+=*.orig " Merge resolution files
+" running make and jumping to errors
+set makeprg=make\ -w " print changing directories
+
" language specific {{{2
set isfname-== " don't treat `=` as being part of filenames