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Make _Static_assert() work with GCC in older C++ standards. 

GCC only activates C11 keywords in C mode, not C++ mode. This means
that when targeting an older C++ standard, we cannot fall back to using
_Static_assert(). In this case, do define _Static_assert() as a macro
that uses a typedef'ed array.

Discussed in:	r322875 commit thread
Reported by:	Mark MIllard
MFC after:	1 month
This commit is contained in:
ed@FreeBSD.org 2017-08-28 09:35:17 +00:00 committed by Sebastian Huber
parent 0e5f252bc7
commit 84e294dc69
1 changed files with 1 additions and 1 deletions
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newlib/libc/include/sys/cdefs.h
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@ -314,7 +314,7 @@
#if (defined(__cplusplus) && __cplusplus >= 201103L) || \ #if (defined(__cplusplus) && __cplusplus >= 201103L) || \
__has_extension(cxx_static_assert) __has_extension(cxx_static_assert)
#define _Static_assert(x, y) static_assert(x, y) #define _Static_assert(x, y) static_assert(x, y)
#elif __GNUC_PREREQ__(4,6) #elif __GNUC_PREREQ__(4,6) && !defined(__cplusplus)
/* Nothing, gcc 4.6 and higher has _Static_assert built-in */ /* Nothing, gcc 4.6 and higher has _Static_assert built-in */
#elif defined(__COUNTER__) #elif defined(__COUNTER__)
#define _Static_assert(x, y) __Static_assert(x, __COUNTER__) #define _Static_assert(x, y) __Static_assert(x, __COUNTER__)