Build GCC on CI with GCC, not Clang by Kobzol · Pull Request #138451 · rust-lang/rust (original) (raw)

We think that the specific instance that we hit was https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117952, or something similar.

But more generally, I expect that building GCC with Clang would require various workarounds and have quirks, we already had to modify compiler flags to even get it to compile.

So just using GCC as the host compiler should be a more robust choice in the future.