1dnl @synopsis GCC_AC_ENABLE_DECIMAL_FLOAT([target triplet])
2dnl
3dnl Enable C extension for decimal float if target supports it.
4dnl
5dnl @author Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>
6
7AC_DEFUN([GCC_AC_ENABLE_DECIMAL_FLOAT],
8[
9AC_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 $enable_decimal_float in
16    yes | no | bid | dpd) default_decimal_float=$enable_decimal_float ;;
17    *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
18Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
19  esac
20],
21[
22  case $1 in
23    powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux* | s390*-*-linux* | \
24    i?86*-*-elfiamcu | i?86*-*-gnu* | \
25    i?86*-*-mingw* | x86_64*-*-mingw* | \
26    i?86*-*-cygwin* | x86_64*-*-cygwin*)
27      enable_decimal_float=yes
28      ;;
29    *)
30      AC_MSG_WARN([decimal float is not supported for this target, ignored])
31      enable_decimal_float=no
32      ;;
33  esac
34])
35
36# x86's use BID format instead of DPD
37case x$enable_decimal_float in
38  xyes)
39    case $1 in
40      i?86*-*-* | x86_64*-*-*)
41	enable_decimal_float=bid
42	;;
43      *)
44	enable_decimal_float=dpd
45	;;
46    esac
47    default_decimal_float=$enable_decimal_float
48    ;;
49  xno)
50    # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper
51    # dependency on libdecnumber.
52    default_decimal_float=dpd
53    ;;
54esac
55AC_SUBST(enable_decimal_float)
56
57])
58