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Re: Build failure with GCC 15 (defaults to -std=gnu23)

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Thomas Munro <thomas.munro@gmail.com>
Cc: Sam James <sam@gentoo.org>, pgsql-bugs@lists.postgresql.org
Date: 2024-11-17T22:50:47Z
Lists: pgsql-bugs 
Thomas Munro <thomas.munro@gmail.com> writes:
> It sounds like we should stop using the old and broken
> AC_CHECK_HEADER_STDBOOL macro.

Yeah, that's what I was imagining: assume that <stdbool.h> exists
and works, and check only to see if sizeof(bool) is acceptable.

> ... Later autoconf versions check for
> C99 "or later", but we're stuck with the old one and I doubt we are
> going to upgrade it.

I'm not sure --- there was some discussion a week or two ago about
upgrading autoconf after all.  But whether we do or not, it's hard
to see what AC_HEADER_STDBOOL is buying us.

			regards, tom lane

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Require sizeof(bool) == 1.

  2. If a C23 compiler is detected, try asking for C17.

  3. Fix C23 compiler warning

  4. Rename C23 keyword

  5. Assume that <stdbool.h> conforms to the C standard.

  6. Revise tree-walk APIs to improve spec compliance & silence warnings.