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dnl @synopsis GCC_AC_ENABLE_DECIMAL_FLOAT([target triplet])

dnl

dnl Enable C extension for decimal float if target supports it.

dnl

dnl @author Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>

AC_DEFUN([GCC_AC_ENABLE_DECIMAL_FLOAT],

[

AC_ARG_ENABLE(decimal-float,

[  --enable-decimal-float={no,yes,bid,dpd}

                        enable decimal float extension to C.  Selecting 'bid'

                        or 'dpd' choses which decimal floating point format

                        to use],

[

  case $enable_decimal_float in

    yes | no | bid | dpd) default_decimal_float=$enable_decimal_float ;;

    *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.

Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;

  esac

],

[

  case $1 in

    powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux* | s390*-*-linux* | \

    i?86*-*-mingw* | x86_64*-*-mingw* | \

    i?86*-*-cygwin*)

      enable_decimal_float=yes

      ;;

    *)

      AC_MSG_WARN([decimal float is not supported for this target, ignored])

      enable_decimal_float=no

      ;;

  esac

])

# x86's use BID format instead of DPD

case x$enable_decimal_float in

  xyes)

    case $1 in

      i?86*-*-* | x86_64*-*-*)

        enable_decimal_float=bid

        ;;

      *)

        enable_decimal_float=dpd

        ;;

    esac

    default_decimal_float=$enable_decimal_float

    ;;

  xno)

    # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper

    # dependency on libdecnumber.

    default_decimal_float=dpd

    ;;

esac

AC_SUBST(enable_decimal_float)

])