[Bug target/122953] __ARM_PCS_AAPCS64 is incorrectly defined for aarch64-mingw

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122953

--- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Saurabh Jha <saurabh...@gcc.gnu.org>:

https://gcc.gnu.org/g:c6bb3a81db8bffd6df748b844904d3e3a9cea8a0

commit r16-8082-gc6bb3a81db8bffd6df748b844904d3e3a9cea8a0
Author: Saurabh Jha <saurabh....@arm.com>
Date:   Thu Mar 12 11:57:26 2026 +0000

    aarch64: mingw: Fix _ARM_PCS_AAPCS64 [PR122953]

    Windows platforms do not support the default procedure calling standard,
    AAPCS64. So _ARM_PCS_AAPCS64 should not be set for Windows targets.

    This fixes the setting of __ARM_PCS_AAPCS64 by making it conditional on
    non-Windows targets.

            PR target/122953

    gcc/ChangeLog:

            * config/aarch64/aarch64-c.cc
            (TARGET_AARCH64_MS_ABI): Explicitly set it to 0 if not on mingw.
            (aarch64_define_unconditional_macros): Remove __ARM_PCS_AAPCS64
            from here.
            (aarch64_update_cpp_builtins): Define __ARM_PCS_AAPCS64 if not
            on Windows ABI.

            ---
            Hey,

            Regression tested on aarch64-linux-gnu and found no regressions.
            Built for arch64-w64-mingw32, ran target dependent tests, and
            found no regressions.

            Ok for master?

            Thanks,
            Saurabh