sim/m4/sim_ac_option_alignment.m4

   1 dnl   Copyright (C) 1997-2021 Free Software Foundation, Inc.
   2 dnl
   3 dnl This program is free software; you can redistribute it and/or modify
   4 dnl it under the terms of the GNU General Public License as published by
   5 dnl the Free Software Foundation; either version 3 of the License, or
   6 dnl (at your option) any later version.
   7 dnl
   8 dnl This program is distributed in the hope that it will be useful,
   9 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 dnl GNU General Public License for more details.
  12 dnl
  13 dnl You should have received a copy of the GNU General Public License
  14 dnl along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15 dnl
  16 dnl Specify the alignment restrictions of the target architecture.
  17 dnl Without this option all possible alignment restrictions are accommodated.
  18 AC_DEFUN([SIM_AC_OPTION_ALIGNMENT],
  19 [dnl
  20 AC_MSG_CHECKING([whether to force sim alignment])
  21 sim_alignment=
  22 AC_ARG_ENABLE(sim-alignment,
  23 [AS_HELP_STRING([--enable-sim-alignment=align],
  24                 [Specify strict, nonstrict or forced alignment of memory accesses])],
  25 [case "${enableval}" in
  26   yes | strict | STRICT)      sim_alignment="STRICT_ALIGNMENT";;
  27   no | nonstrict | NONSTRICT) sim_alignment="NONSTRICT_ALIGNMENT";;
  28   forced | FORCED)            sim_alignment="FORCED_ALIGNMENT";;
  29   *) AC_MSG_ERROR("Unknown value $enableval passed to --enable-sim-alignment");;
  30 esac])dnl
  31 AC_DEFINE_UNQUOTED([WITH_ALIGNMENT], [${sim_alignment:-0}], [Sim alignment settings])
  32 AC_MSG_RESULT([${sim_alignment:-no}])
  33 ])dnl