mozilla/rust — Issue #1879: support LLVM subtargets
Author: graydon
Created: 2012-02-22 01:29:01+00:00
State: open

Currently we generate code for LLVM targets with target-specific features (subtargets, use of specific ISA features) on or off based on defaults. In some cases the defaults are ok, sometimes they're sniffed from the host (!) but in any case the user has no way to do something like "build me an x86 binary with no SSE".

This matters for old hardware, and will matter much more when targeting phones.