Comment by eqvinox

I was talking about glibc; none of the things you mention relate to that. (Note glibc is not used on Windows.) I'm painfully aware of some of the breakage GCC occasionally causes (the atomics fall into that — but to be fair ARMv6 is also >10 years ago at this point, unless you're doing embedded, in which case you generally build the whole system anyway and don't care about these breaks.)

Also, just in case it's not clear, glibc has nothing to do with GCC.