diff options
Diffstat (limited to 'm4/stdalign.m4')
| -rw-r--r-- | m4/stdalign.m4 | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/m4/stdalign.m4 b/m4/stdalign.m4 index 3d7993db..9efafe5c 100644 --- a/m4/stdalign.m4 +++ b/m4/stdalign.m4 @@ -1,6 +1,6 @@ # Check for stdalign.h that conforms to C11. -dnl Copyright 2011-2013 Free Software Foundation, Inc. +dnl Copyright 2011-2014 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. @@ -31,10 +31,12 @@ AC_DEFUN([gl_STDALIGN_H], /* 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 test_alignas[_Alignof (alignas_int) == 8 ? 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], |