1*f9a78e0eSmrgdnl Copyright (C) 2015 Free Software Foundation, Inc. 2*f9a78e0eSmrgdnl This file is free software, distributed under the terms of the GNU 3*f9a78e0eSmrgdnl General Public License. As a special exception to the GNU General 4*f9a78e0eSmrgdnl Public License, this file may be distributed as part of a program 5*f9a78e0eSmrgdnl that contains a configuration script generated by Autoconf, under 6*f9a78e0eSmrgdnl the same distribution terms as the rest of that program. 7*f9a78e0eSmrg 8*f9a78e0eSmrg# Define HAVE_BITFIELD_TYPE_MATTERS if the type of bitfields effects their 9*f9a78e0eSmrg# alignment. 10*f9a78e0eSmrg 11*f9a78e0eSmrgAC_DEFUN([gt_BITFIELD_TYPE_MATTERS], 12*f9a78e0eSmrg[ 13*f9a78e0eSmrg AC_CACHE_CHECK([if the type of bitfields matters], gt_cv_bitfield_type_matters, 14*f9a78e0eSmrg [ 15*f9a78e0eSmrg AC_TRY_COMPILE( 16*f9a78e0eSmrg [struct foo1 { char x; char y:1; char z; }; 17*f9a78e0eSmrgstruct foo2 { char x; long long int y:1; char z; }; 18*f9a78e0eSmrgint foo1test[ sizeof (struct foo1) < sizeof (struct foo2) ? 1 : -1 ]; ], 19*f9a78e0eSmrg [], gt_cv_bitfield_type_matters=yes, gt_cv_bitfield_type_matters=no) 20*f9a78e0eSmrg ]) 21*f9a78e0eSmrg if test $gt_cv_bitfield_type_matters = yes; then 22*f9a78e0eSmrg AC_DEFINE(HAVE_BITFIELD_TYPE_MATTERS, 1, 23*f9a78e0eSmrg [Define if the type of bitfields effects alignment.]) 24*f9a78e0eSmrg fi 25*f9a78e0eSmrg]) 26