linux-kernel - [PATCH 1/1] arch/powerpc: Remove redundant typedef for bool

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Message-ID: <20250323163607.537270-1-misanjum@linux.ibm.com>
Date: Sun, 23 Mar 2025 11:36:06 -0500
From: Misbah Anjum N <misanjum@...ux.ibm.com>
To: linuxppc-dev@...ts.ozlabs.org
Cc: maddy@...ux.ibm.com, mpe@...erman.id.au, npiggin@...il.com,
        christophe.leroy@...roup.eu, naveen@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] arch/powerpc: Remove redundant typedef for bool

Hi,

I noticed that a patch addressing the same issue has been proposed by
Michal Suchanek:
https://lore.kernel.org/linuxppc-dev/Z86liwlwP5WvrEkw@kitsune.suse.cz/T/#t

The existing patch addresses the compilation error by modifying the Makefile
to use `gnu11` with `BOOTTARGETFLAGS`. This is a practical approach to avoid
the error in the short term.

This patch builds on that work by providing a long-term solution that ensures
compatibility with C23 while maintaining backward compatibility. Specifically:
    - It uses `__STDC_VERSION__` to conditionally define the `bool` typedef only
    for pre-C23 standards.
    - It ensures that the code is future-proof and ready for upcoming C23 standards,
    where `bool`, `true`, and `false` are reserved keywords.
    - It avoids reliance on compiler-specific flags, making the code more portable
    and standards-compliant.

Changlog:
    - Adding version check via __STDC_VERSION__
    - If  __STDC_VERSION__ < C23, 'typedef int bool' is defined as usual
    - If __STDC_VERSION__ >= C23, the typedef redundancy is removed

The patch has been tested with:
    - gcc (GCC) 15.0.1 20250228 (Red Hat 15.0.1-0)
    - gcc (GCC) 14.2.1 20250110 (Red Hat 14.2.1-7)

Thanks,
Misbah Anjum N


Misbah Anjum N (1):
  arch/powerpc: Remove redundant typedef for bool

 arch/powerpc/boot/types.h | 2 ++
 1 file changed, 2 insertions(+)

-- 
2.49.0