config/dfp.m4

   1 dnl @synopsis GCC_AC_ENABLE_DECIMAL_FLOAT([target triplet])
   2 dnl
   3 dnl Enable C extension for decimal float if target supports it.
   4 dnl
   5 dnl @author Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>
   6
   7 AC_DEFUN([GCC_AC_ENABLE_DECIMAL_FLOAT],
   8 [
   9 AC_ARG_ENABLE(decimal-float,
  10 [  --enable-decimal-float={no,yes,bid,dpd}
  11                         enable decimal float extension to C.  Selecting 'bid'
  12                         or 'dpd' choses which decimal floating point format
  13                         to use],
  14 [
  15   case $enable_decimal_float in
  16     yes | no | bid | dpd) ;;
  17     *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
  18 Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
  19   esac
  20 ],
  21 [
  22   case $1 in
  23     powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux* | s390*-*-linux*)
  24       enable_decimal_float=yes
  25       ;;
  26     *)
  27       AC_MSG_WARN(decimal float is not supported for this target, ignored)
  28       enable_decimal_float=no
  29       ;;
  30   esac
  31 ])
  32
  33 # x86's use BID format instead of DPD
  34 case x$enable_decimal_float in
  35   xyes)
  36     case $1 in
  37       i?86*-*-* | x86_64*-*-*)
  38         enable_decimal_float=bid
  39         ;;
  40       *)
  41         enable_decimal_float=dpd
  42         ;;
  43     esac
  44     ;;
  45   xno)
  46     # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper
  47     # dependency on libdecnumber.
  48     enable_decimal_float=dpd
  49     ;;
  50 esac
  51 AC_SUBST(enable_decimal_float)
  52
  53 ])