freebsd: Fix obscure c++98 interaction used by gbenchmark (#335454)

    description = "Microbenchmark support library";

    homepage = "https://github.com/google/benchmark";

    license = licenses.asl20;

    platforms = platforms.linux ++ platforms.darwin;

    platforms = platforms.linux ++ platforms.darwin ++ platforms.freebsd;

    maintainers = with maintainers; [ abbradar ];

  };

}

From 22cdafe197ac960c5ce839ef6ec699b59f4b0080 Mon Sep 17 00:00:00 2001

From: Warner Losh <imp@FreeBSD.org>

Date: Sat, 20 Jul 2024 09:57:53 -0600

Subject: cdefs.h: Don't define fallback for _Static_assert

Remove pre 4.6 code to define _Static_assert in terms of _COUNTER.  We

no longer need to support compilers this old (in fact support for all

pre gcc 10 compilers has been removed in -current). This is a partial

MFC of that work because removing this fixes a bug that's oft reported

with -pedantic-errors and C++98 compilations.

PR: 280382, 276738

Sponsored by:		Netflix

This is a direct commit to stable/14.

---

 sys/sys/cdefs.h | 9 ---------

 1 file changed, 9 deletions(-)

diff --git a/sys/sys/cdefs.h b/sys/sys/cdefs.h

index 19b7d8fe427d..a52864c5db9d 100644

--- a/sys/sys/cdefs.h

+++ b/sys/sys/cdefs.h

@@ -277,15 +277,6 @@

 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \

     __has_extension(cxx_static_assert)

 #define	_Static_assert(x, y)	static_assert(x, y)

-#elif __GNUC_PREREQ__(4,6) && !defined(__cplusplus)

-/* Nothing, gcc 4.6 and higher has _Static_assert built-in */

-#elif defined(__COUNTER__)

-#define	_Static_assert(x, y)	__Static_assert(x, __COUNTER__)

-#define	__Static_assert(x, y)	___Static_assert(x, y)

-#define	___Static_assert(x, y)	typedef char __assert_ ## y[(x) ? 1 : -1] \

-				__unused

-#else

-#define	_Static_assert(x, y)	struct __hack

 #endif

 #endif

-- 

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