# Check for stdalign.h that conforms to C11.
-dnl Copyright 2011-2012 Free Software Foundation, Inc.
+dnl Copyright 2011-2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
#include <stddef.h>
/* Test that alignof yields a result consistent with offsetof.
- This catches GCC bug 51316
- <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51316>. */
+ This catches GCC bug 52023
+ <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023>. */
#ifdef __cplusplus
template <class t> struct alignof_helper { char a; t b; };
# define ao(type) offsetof (alignof_helper<type>, b)
#else
# define ao(type) offsetof (struct { char a; type b; }, b)
#endif
- char test1[_Alignof (double) == ao (double) ? 1 : -1];
- char test2[alignof (long int) == ao (long int) ? 1 : -1];
+ char test_double[ao (double) % _Alignof (double) == 0 ? 1 : -1];
+ char test_long[ao (long int) % _Alignof (long int) == 0 ? 1 : -1];
+ char test_alignof[alignof (double) == _Alignof (double) ? 1 : -1];
/* 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)
- int alignas (8) alignas_int = 1;
- char test3[8 <= _Alignof (alignas_int) ? 1 : -1];
+ struct alignas_test { char c; char alignas (8) alignas_8; };
+ char test_alignas[offsetof (struct alignas_test, alignas_8) == 8
+ ? 1 : -1];
#endif
]])],
[gl_cv_header_working_stdalign_h=yes],