blob: 8185cd302a9c6a9047431f52dd769ad77e1135cd [file] [log] [blame]
dnl Copyright (C) 2015 Free Software Foundation, Inc.
dnl This file is free software, distributed under the terms of the GNU
dnl General Public License. As a special exception to the GNU General
dnl Public License, this file may be distributed as part of a program
dnl that contains a configuration script generated by Autoconf, under
dnl the same distribution terms as the rest of that program.
# Define HAVE_BITFIELD_TYPE_MATTERS if the type of bitfields effects their
# alignment.
AC_CACHE_CHECK([if the type of bitfields matters], gt_cv_bitfield_type_matters,
[struct foo1 { char x; char y:1; char z; };
struct foo2 { char x; long long int y:1; char z; };
int foo1test[ sizeof (struct foo1) < sizeof (struct foo2) ? 1 : -1 ]; ],
[], gt_cv_bitfield_type_matters=yes, gt_cv_bitfield_type_matters=no)
if test $gt_cv_bitfield_type_matters = yes; then
[Define if the type of bitfields effects alignment.])