Google has been working to switch our default runtime library for x86-linux to compiler-rt, both to simplify our builds and to possibly enable some interesting new projects.
For situations where builds currently use libgcc.a, our early tests show that libcompiler-rt.builtins.a works reasonably well, with only very minor issues, which we are working to resolve.
Replacing libgcc_s is a little more involved, but we think we will be in a position to do that soon as well. New build rules and such are on their way.
Would there be any objections to switching the default runtime library for linux-x86 to compiler-rt?