On Wednesday, 30 October 2019 at 12:07:50 UTC, Sobaya wrote: > I tried but get an error "Option 'mc-relax-all' registered more > than once!". See https://wiki.dlang.org/Building_LDC_from_source - you'll need to set LDC_WITH_LLD=OFF (I guess you're linking against the shared LLVM library...).