Re: git: 3d6f4411e45f - main - Remove checks for <sys/cdefs.h> being included.

From: John Baldwin <jhb_at_FreeBSD.org>
Date: Tue, 12 Apr 2022 23:22:28 UTC 
On 4/12/22 10:10 AM, John Baldwin wrote:
> The branch main has been updated by jhb:
> 
> URL: https://cgit.FreeBSD.org/src/commit/?id=3d6f4411e45f49dc0fef6d428615df5107ce2e5d
> 
> commit 3d6f4411e45f49dc0fef6d428615df5107ce2e5d
> Author:     John Baldwin <jhb@FreeBSD.org>
> AuthorDate: 2022-04-12 17:06:18 +0000
> Commit:     John Baldwin <jhb@FreeBSD.org>
> CommitDate: 2022-04-12 17:06:18 +0000
> 
>      Remove checks for <sys/cdefs.h> being included.
>      
>      These files no longer depend on the macros required when these checks
>      were added.
>      
>      PR:             263102 (exp-run)
>      Reviewed by:    brooks, imp, emaste
>      Differential Revision:  https://reviews.freebsd.org/D34804

Note that this series of commits to remove checks for __GNUCLIKE* and __CC_SUPPORTS*
have been based on the assumption that FreeBSD itself (base system and kernel) requires
a modern version of GCC/clang (and that we aren't going to support ancient versions
of icc or other compilers that don't support the GNU C extensions we rely on).

In particular, I haven't removed anything from <sys/cdefs.h> which might have
broader fallout.  We probably still want to permit using a compiler like tcc to
build "plain" C applications (that aren't using FreeBSD-specific APIs like
<machine/atomic.h> or <machine/cpufunc.h>).

-- 
John Baldwin