Andrew Chow 4de4221ab4 build: Check for std::atomic::exchange rather than std::atomic_exchange ... Our usage of std::atomic is with it's own exchange function, not std::atomic_exchange. So we should be looking specifically for that function. Additionally, -pthread and -lpthread have an effect on whether -latomic will be needed, so the atomics check needs to use these flags as well. This will make the flags in use better match what is actually used when linking. This removes the need for -latomic for riscv builds, which resolves a guix cross architecture reproducibility issue.		2022-07-18 10:47:19 -04:00
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m4	build: Check for std::atomic::exchange rather than std::atomic_exchange	2022-07-18 10:47:19 -04:00