[cfe-dev] __atomic_ builtins for 64-bit types in 32-bit mode

[Joerg Sonnenberger]

On Wed, Jan 23, 2013 at 01:04:40PM +0400, Kostya Serebryany wrote:
> Looks like __atomic_ builtins for 64-bit types in 32-bit mode
> are not supported in the clang trunk, see e.g.
> http://llvm.org/bugs/show_bug.cgi?id=15034

x86 I assume? That requires cmpxchg8, which needs at least Pentiumish
feature set. Does using -march help?

Joerg