FWIW, i've compiled llvm/rust with 2G, I never ran out of ram compiling rust, but in llvm gnu-ld would run out of memory, using the gold linker fixes that, as w

FWIW, i've compiled llvm/rust with 2G, I never ran out of ram compiling rust, but in llvm gnu-ld would run out of memory, using the gold linker fixes that, as well as the configuration flag for enabling separate debug info -DLLVM_USE_SPLIT_DWARF=ON