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/* { dg-do compile } */
#define HAVE_C11 (__STDC_VERSION__ >= 201112L)
#if !__has_feature (objc_instancetype)
#error
#endif
#if !__has_feature (objc_default_synthesize_properties)
#error
#endif
/* C features should be available as extensions. */
#if !__has_extension (c_alignas)
#error
#endif
/* And as features given the appropriate C standard. */
#if __has_feature (c_alignas) != HAVE_C11
#error
#endif
/* Shouldn't have C++ features even as extensions. */
#if __has_feature (cxx_constexpr) || __has_extension (cxx_constexpr)
#error
#endif
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