[flang-commits] [clang] [flang] [SPARC][Driver] Move feature mode selection to Arch/Sparc.cpp (PR #149652)

[Rainer Orth via flang-commits]

rorth wrote:

I've now tested the (original version of) the patch on both `sparc64-unknown-linux-gnu` and `sparcv9-sun-solaris2.11`.  The Linux/sparc64 build failure is gone, no regressions on either target.

Btw., prompted by this I've discovered that GCC's `-mcpu=v9` default on Solaris/SPARC is way outdated: the Oracle Studio compilers default to `-xarch=sparcvis2` since version 12.6 (from 2017 no less), which is `-mcpu=ultrasparc3` in `gcc`/`clang` lingo.  The 32 and 64-bit `libc.so.1` match this.  I'll update the `gcc` default after testing, and provide a similar patch for `clang` afterwards.  Thanks for pointing this out!

https://github.com/llvm/llvm-project/pull/149652