Let's a void any kind of compilation/LLVM errors for niche targets such as AVR/MSP430 or ARM v6m. By not exporting any atomic builtin anymore the user is free to provide their own implementation (that disable the IRQs) or to provide the --single-threaded switch and forget about this.
LemonBoy committed on 12/9/2020, 3:33:53 PMparent97c0e1c
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