/* Test _Alignas only on platforms where gnulib can help. */
#if \
- (__GNUC__ || __IBMC__ || __IBMCPP__ \
+ ((defined __cplusplus && 201103 <= __cplusplus) \
+ || __GNUC__ || __IBMC__ || __IBMCPP__ || __ICC \
|| 0x5110 <= __SUNPRO_C || 1300 <= _MSC_VER)
struct alignas_test { char c; char alignas (8) alignas_8; };
char test_alignas[offsetof (struct alignas_test, alignas_8) == 8