Frontend access to target-related options

Nathan Sidwell
Thu Jan 2 16:54:00 GMT 2020

On 1/1/20 4:31 AM, The Other wrote:
> Hi,
> I'm currently working on a Rust frontend for GCC. Rust has some
> language-level conditional compilation features based on the presence or
> lack of features in the target architecture (e.g. SSE, AVX, a static C
> runtime) as well as the target CPU architecture itself, target OS, and
> various other target-related information (such as pointer width and
> endianness).
> As such, the frontend parser requires this target-related option
> information to be available to it. I was wondering if there was an
> architecture-neutral way of accessing this data (if it is even stored).
> I've looked into options.h but I cannot figure out how to use it in an
> architecture-neutral way.

Um, AVX and such are arch-specific.  It sounds like you need some kind 
of (new?) langhook that targets can register?


Nathan Sidwell

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