[all-commits] [llvm/llvm-project] 95bbe9: [clang][ARM] follow GCC behavior for defining __SO...

[Ties Stuij via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 95bbe9a1930886cffc79f1f5b953f5aafff1557f
      https://github.com/llvm/llvm-project/commit/95bbe9a1930886cffc79f1f5b953f5aafff1557f
  Author: Ties Stuij <ties.stuij at arm.com>
  Date:   2022-10-18 (Tue, 18 Oct 2022)

  Changed paths:
    M clang/lib/Basic/Targets/ARM.cpp
    M clang/test/Preprocessor/init-arm.c

  Log Message:
  -----------
  [clang][ARM] follow GCC behavior for defining __SOFTFP__

GCC behavior regarding defining __SOFTFP__ when (implicitly) specifying
-mfloat-abi=softfp:
- compile without (implicit) FP: define __SOFTFP__
- compile with (implicit) FP: don't define __SOFTFP__

Currently Clang doesn't define __SOFTFP__ when softfp is specified, either with
or without FP. This patch brings Clang in line with GCC behavior.

This was raised by itaig1 over on Github:
https://github.com/llvm/llvm-project/issues/55755

Reviewed By: pratlucas

Differential Revision: https://reviews.llvm.org/D135680