1 dnl @synopsis GCC_AC_ENABLE_DECIMAL_FLOAT([target triplet])
3 dnl Enable C extension for decimal float if target supports it.
5 dnl @author Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
7 AC_DEFUN([GCC_AC_ENABLE_DECIMAL_FLOAT],
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
15 case $enable_decimal_float in
16 yes | no | bid | dpd) default_decimal_float=$enable_decimal_float ;;
17 *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
18 Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
23 powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux* | s390*-*-linux* | \
24 i?86*-*-elfiamcu | i?86*-*-gnu* | \
25 i?86*-*-mingw* | x86_64*-*-mingw* | \
26 i?86*-*-cygwin* | x86_64*-*-cygwin*)
27 enable_decimal_float=yes
30 AC_MSG_WARN([decimal float is not supported for this target, ignored])
31 enable_decimal_float=no
36 # x86's use BID format instead of DPD
37 case x$enable_decimal_float in
40 i?86*-*-* | x86_64*-*-*)
41 enable_decimal_float=bid
44 enable_decimal_float=dpd
47 default_decimal_float=$enable_decimal_float
50 # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper
51 # dependency on libdecnumber.
52 default_decimal_float=dpd
55 AC_SUBST(enable_decimal_float)