[LLVMdev] [cfe-dev] [PATCH] triples for baremetal

[Tim Northover]

Hi Jon,

On 24 June 2014 14:58, Jonathan Roelofs <jonathan at codesourcery.com> wrote:
> This patch changes behavior a little for macho_embedded targets (i.e. from
> OSType::Unknown to OSType::NoneOS). I see that there is existing code to
> transform triples from things like thumbv7-apple-darwin into
> thumbv7m-apple-unknown-macho. Do you have an expectation to support users
> who are using the latter form of triples who would be surprised by the
> change from thumbv7m-apple-unknown-macho to thumbv7m-apple-none-macho (i.e.
> their thumbv7m-apple-unknown-macho builds no longer work)?

Mostly people should be getting these triples (from out perspective)
via "-arch armv7m" and similar, so things should just work for them.

> Is this a case where all three triples are to mean the same thing?

Well, "-darwin" is different, but that's already taken care of in the
driver. I'm actually still a little hazy on when the two being
disambiguated would ever be treated differently. But no doubt someone
has plans, so I'll watch with interest.

Cheers.

Tim.