diff mbox

Allow decimal floats for mingw-w64

Message ID 4C7FB6E2.4040503@users.sourceforge.net
State New
Headers show

Commit Message

JonY Sept. 2, 2010, 2:38 p.m. UTC 
On 8/24/2010 22:57, JonY wrote:
> On 8/24/2010 23:05, Joseph S. Myers wrote:
>> On Tue, 24 Aug 2010, JonY wrote:
>>
>>> Hi,
>>>
>>> Attached patch enables i?86-w64-mingw32 and x86_64-w64-mingw32
>>> decimal float
>>> support with bid.
>>
>> My previous comments about the several places to keep in sync
>> <http://gcc.gnu.org/ml/gcc-patches/2010-02/msg00933.html> apply
>> equally to
>> this patch (see also followups to the previous comments).
>>
>
> Thanks for the heads up. New patch with quick fixes attached.
>
> Do you want the GCC_AC_ENABLE_DECIMAL_FLOAT version instead?

Here is a new attached patch based on the link above. It mostly copies 
the existing logic and consolidates them into a single file.

Bootstrap tested on i686-pc-cygwin.

Comments

JonY Sept. 7, 2010, 1:42 a.m. UTC | #1 
On 9/2/2010 22:38, JonY wrote:
> On 8/24/2010 22:57, JonY wrote:
>> On 8/24/2010 23:05, Joseph S. Myers wrote:
>>> On Tue, 24 Aug 2010, JonY wrote:
>>>
>>>> Hi,
>>>>
>>>> Attached patch enables i?86-w64-mingw32 and x86_64-w64-mingw32
>>>> decimal float
>>>> support with bid.
>>>
>>> My previous comments about the several places to keep in sync
>>> <http://gcc.gnu.org/ml/gcc-patches/2010-02/msg00933.html> apply
>>> equally to
>>> this patch (see also followups to the previous comments).
>>>
>>
>> Thanks for the heads up. New patch with quick fixes attached.
>>
>> Do you want the GCC_AC_ENABLE_DECIMAL_FLOAT version instead?
>
> Here is a new attached patch based on the link above. It mostly copies
> the existing logic and consolidates them into a single file.
>
> Bootstrap tested on i686-pc-cygwin.

Ping.
diff mbox

Patch

Index: gcc/configure
===================================================================
--- gcc/configure	(revision 163756)
+++ gcc/configure	(working copy)
@@ -1577,9 +1577,9 @@ 
   --enable-multilib       enable library support for multiple ABIs
   --enable-__cxa_atexit   enable __cxa_atexit for C++
   --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
+                          enable decimal float extension to C.  Selecting 'bid'
+                          or 'dpd' choses which decimal floating point format
+                          to use
   --enable-fixed-point    enable fixed-point arithmetic extension to C
   --enable-threads        enable thread usage for target GCC
   --enable-threads=LIB    use LIB thread package for target GCC
@@ -6649,65 +6649,77 @@ 
 
 
 # Enable C extension for decimal float if target supports it.
-# Check whether --enable-decimal-float was given.
+
+  # Enable C extension for decimal float if target supports it.
+  # Check whether --enable-decimal-float was given.
 if test "${enable_decimal_float+set}" = set; then :
   enableval=$enable_decimal_float;
-  case $enable_decimal_float in
-    yes | no | bid | dpd) ;;
-    *) as_fn_error "'$enable_decimal_float' is an invalid value for --enable-decimal-float.
-Valid choices are 'yes', 'bid', 'dpd', and 'no'." "$LINENO" 5 ;;
-  esac
+    case $enable_decimal_float in
+      yes | no | bid | dpd) ;;
+      *) as_fn_error "'$enable_decimal_float' is an invalid value for --enable-decimal-float.
+  Valid choices are 'yes', 'bid', 'dpd', and 'no'." "$LINENO" 5 ;;
+    esac
 
 else
 
-  case $target in
-    powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
-      enable_decimal_float=yes
-      ;;
-    *)
-      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: decimal float is not supported for this target" >&5
+    case $target in
+      powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux* | \
+      i?86*-*-mingw* | x86_64*-*-mingw* | \
+      i?86*-*-cygwin*)
+        enable_decimal_float=yes
+        ;;
+      *)
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: decimal float is not supported for this target" >&5
 $as_echo "$as_me: WARNING: decimal float is not supported for this target" >&2;}
-      enable_decimal_float=no
-      ;;
-  esac
+        enable_decimal_float=no
+        ;;
+    esac
 
 fi
 
 
-dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
+  dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
 
 cat >>confdefs.h <<_ACEOF
 #define ENABLE_DECIMAL_FLOAT $dfp
 _ACEOF
 
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for decimal floating point" >&5
+$as_echo_n "checking for decimal floating point... " >&6; }
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_decimal_float" >&5
+$as_echo "$enable_decimal_float" >&6; }
 
-# x86's use BID format instead of DPD
-case x$enable_decimal_float in
-  xyes)
-    case $target in
-      i?86*-*-linux* | x86_64*-*-linux*)
-	enable_decimal_float=bid
-	;;
-      *)
-	enable_decimal_float=dpd
-	;;
-    esac
+  # x86's use BID format instead of DPD
+  case x$enable_decimal_float in
+    xyes)
+      case $target in
+        i?86*-*-linux* | x86_64*-*-linux* | \
+        i?86*-*-mingw* | x86_64*-*-mingw* | \
+        i?86*-*-cygwin*)
+    enable_decimal_float=bid
     ;;
-  xno)
-    # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper
-    # dependency on libdecnumber.
+        *)
     enable_decimal_float=dpd
     ;;
-esac
+      esac
+      ;;
+    xno)
+      # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper
+      # dependency on libdecnumber.
+      enable_decimal_float=dpd
+      ;;
+  esac
 
+  bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 
-bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
-
 cat >>confdefs.h <<_ACEOF
 #define ENABLE_DECIMAL_BID_FORMAT $bid
 _ACEOF
 
 
+
+
+
 # Enable C extension for fixed-point arithmetic.
 # Check whether --enable-fixed-point was given.
 if test "${enable_fixed_point+set}" = set; then :
@@ -17130,7 +17142,7 @@ 
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 17133 "configure"
+#line 17145 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -17236,7 +17248,7 @@ 
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 17239 "configure"
+#line 17251 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
Index: gcc/aclocal.m4
===================================================================
--- gcc/aclocal.m4	(revision 163756)
+++ gcc/aclocal.m4	(working copy)
@@ -106,6 +106,7 @@ 
 m4_include([../lt~obsolete.m4])
 m4_include([../config/acx.m4])
 m4_include([../config/codeset.m4])
+m4_include([../config/dfp.m4])
 m4_include([../config/gettext-sister.m4])
 m4_include([../config/iconv.m4])
 m4_include([../config/lcmessage.m4])
Index: gcc/configure.ac
===================================================================
--- gcc/configure.ac	(revision 163756)
+++ gcc/configure.ac	(working copy)
@@ -606,59 +606,8 @@ 
 [], [])
 
 # Enable C extension for decimal float if target supports it.
-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 $enable_decimal_float in
-    yes | no | bid | dpd) ;;
-    *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
-Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
-  esac
-],
-[
-  case $target in
-    powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
-      enable_decimal_float=yes
-      ;;
-    *)
-      AC_MSG_WARN(decimal float is not supported for this target, ignored)
-      enable_decimal_float=no
-      ;;
-  esac
-])
+GCC_DFP_TARGET
 
-dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
-AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_FLOAT, $dfp,
-[Define to 1 to enable decimal float extension to C.])
-
-# x86's use BID format instead of DPD
-case x$enable_decimal_float in
-  xyes)
-    case $target in
-      i?86*-*-linux* | x86_64*-*-linux*)
-	enable_decimal_float=bid
-	;;
-      *)
-	enable_decimal_float=dpd
-	;;
-    esac
-    ;;
-  xno)
-    # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper
-    # dependency on libdecnumber.
-    enable_decimal_float=dpd
-    ;;
-esac
-AC_SUBST(enable_decimal_float)
-
-bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
-AC_DEFINE_UNQUOTED(ENABLE_DECIMAL_BID_FORMAT, $bid,
-[Define to 1 to specify that we are using the BID decimal floating
-point format instead of DPD])
-
 # Enable C extension for fixed-point arithmetic.
 AC_ARG_ENABLE(fixed-point,
 [  --enable-fixed-point    enable fixed-point arithmetic extension to C],
Index: libdecnumber/configure
===================================================================
--- libdecnumber/configure	(revision 163756)
+++ libdecnumber/configure	(working copy)
@@ -1298,9 +1298,9 @@ 
   --enable-werror-always  enable -Werror despite compiler version
   --enable-maintainer-mode enable rules only needed by maintainers
   --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
+                          enable decimal float extension to C.  Selecting 'bid'
+                          or 'dpd' choses which decimal floating point format
+                          to use
 
 Some influential environment variables:
   CC          C compiler command
@@ -4584,47 +4584,77 @@ 
     NONENONEs,x,x, &&
   program_prefix=${target_alias}-
 
-# Default decimal format
-# If you change the defaults here, be sure to change them in the GCC directory also
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for decimal floating point" >&5
-$as_echo_n "checking for decimal floating point... " >&6; }
-# Check whether --enable-decimal-float was given.
+
+  # Enable C extension for decimal float if target supports it.
+  # Check whether --enable-decimal-float was given.
 if test "${enable_decimal_float+set}" = set; then :
   enableval=$enable_decimal_float;
-  case $enable_decimal_float in
-    yes | no | bid | dpd) ;;
-    *) as_fn_error "'$enable_decimal_float' is an invalid value for --enable-decimal-float.
-Valid choices are 'yes', 'bid', 'dpd', and 'no'." "$LINENO" 5 ;;
-  esac
+    case $enable_decimal_float in
+      yes | no | bid | dpd) ;;
+      *) as_fn_error "'$enable_decimal_float' is an invalid value for --enable-decimal-float.
+  Valid choices are 'yes', 'bid', 'dpd', and 'no'." "$LINENO" 5 ;;
+    esac
 
 else
 
-  case $target in
-    powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
-      enable_decimal_float=yes
-      ;;
-    *)
-      enable_decimal_float=no
-      ;;
-  esac
+    case $target in
+      powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux* | \
+      i?86*-*-mingw* | x86_64*-*-mingw* | \
+      i?86*-*-cygwin*)
+        enable_decimal_float=yes
+        ;;
+      *)
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: decimal float is not supported for this target" >&5
+$as_echo "$as_me: WARNING: decimal float is not supported for this target" >&2;}
+        enable_decimal_float=no
+        ;;
+    esac
 
 fi
 
 
-# x86's use BID format instead of DPD
-# In theory --enable-decimal-float=no should not compile anything
-# For the sake of simplicity, just use the default format in this directory
-if test x$enable_decimal_float = xyes -o x$enable_decimal_float = xno; then
-  case $target in
-    i?86*-*-linux* | x86_64*-*-linux*)
-      enable_decimal_float=bid
+  dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
+
+cat >>confdefs.h <<_ACEOF
+#define ENABLE_DECIMAL_FLOAT $dfp
+_ACEOF
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for decimal floating point" >&5
+$as_echo_n "checking for decimal floating point... " >&6; }
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_decimal_float" >&5
+$as_echo "$enable_decimal_float" >&6; }
+
+  # x86's use BID format instead of DPD
+  case x$enable_decimal_float in
+    xyes)
+      case $target in
+        i?86*-*-linux* | x86_64*-*-linux* | \
+        i?86*-*-mingw* | x86_64*-*-mingw* | \
+        i?86*-*-cygwin*)
+    enable_decimal_float=bid
+    ;;
+        *)
+    enable_decimal_float=dpd
+    ;;
+      esac
       ;;
-    *)
+    xno)
+      # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper
+      # dependency on libdecnumber.
       enable_decimal_float=dpd
       ;;
   esac
-fi
 
+  bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
+
+cat >>confdefs.h <<_ACEOF
+#define ENABLE_DECIMAL_BID_FORMAT $bid
+_ACEOF
+
+
+
+
+
 # If BID is being used, additional objects should be linked in.
 if test x$enable_decimal_float = xbid; then
   ADDITIONAL_OBJS="$ADDITIONAL_OBJS \$(bid_OBJS)"
@@ -4632,11 +4662,8 @@ 
   ADDITIONAL_OBJS=
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_decimal_float" >&5
-$as_echo "$enable_decimal_float" >&6; }
 
 
-
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether byte ordering is bigendian" >&5
 $as_echo_n "checking whether byte ordering is bigendian... " >&6; }
 if test "${ac_cv_c_bigendian+set}" = set; then :
Index: libdecnumber/configure.ac
===================================================================
--- libdecnumber/configure.ac	(revision 163756)
+++ libdecnumber/configure.ac	(working copy)
@@ -72,46 +72,8 @@ 
 
 AC_CANONICAL_TARGET
 
-# Default decimal format
-# If you change the defaults here, be sure to change them in the GCC directory also
-AC_MSG_CHECKING([for decimal floating point])
-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 $enable_decimal_float in
-    yes | no | bid | dpd) ;;
-    *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
-Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
-  esac
-],
-[
-  case $target in
-    powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
-      enable_decimal_float=yes
-      ;;
-    *)
-      enable_decimal_float=no
-      ;;
-  esac
-])
+GCC_DFP_TARGET
 
-# x86's use BID format instead of DPD
-# In theory --enable-decimal-float=no should not compile anything
-# For the sake of simplicity, just use the default format in this directory
-if test x$enable_decimal_float = xyes -o x$enable_decimal_float = xno; then
-  case $target in
-    i?86*-*-linux* | x86_64*-*-linux*)
-      enable_decimal_float=bid
-      ;;
-    *)
-      enable_decimal_float=dpd
-      ;;
-  esac
-fi
-
 # If BID is being used, additional objects should be linked in.
 if test x$enable_decimal_float = xbid; then
   ADDITIONAL_OBJS="$ADDITIONAL_OBJS \$(bid_OBJS)"
@@ -119,8 +81,6 @@ 
   ADDITIONAL_OBJS=
 fi
 
-AC_MSG_RESULT($enable_decimal_float)
-AC_SUBST(enable_decimal_float)
 AC_SUBST(ADDITIONAL_OBJS)
 
 AC_C_BIGENDIAN
Index: libdecnumber/config.in
===================================================================
--- libdecnumber/config.in	(revision 163756)
+++ libdecnumber/config.in	(working copy)
@@ -3,6 +3,13 @@ 
 /* Define if building universal (internal helper macro) */
 #undef AC_APPLE_UNIVERSAL_BUILD
 
+/* Define to 1 to specify that we are using the BID decimal floating point
+   format instead of DPD */
+#undef ENABLE_DECIMAL_BID_FORMAT
+
+/* Define to 1 to enable decimal float extension to C. */
+#undef ENABLE_DECIMAL_FLOAT
+
 /* Define to 1 if you have the <ctype.h> header file. */
 #undef HAVE_CTYPE_H
 
Index: libdecnumber/aclocal.m4
===================================================================
--- libdecnumber/aclocal.m4	(revision 163756)
+++ libdecnumber/aclocal.m4	(working copy)
@@ -11,6 +11,7 @@ 
 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 # PARTICULAR PURPOSE.
 
+m4_include([../config/dfp.m4])
 m4_include([../config/override.m4])
 m4_include([../config/stdint.m4])
 m4_include([../config/warnings.m4])
Index: libgcc/configure
===================================================================
--- libgcc/configure	(revision 163756)
+++ libgcc/configure	(working copy)
@@ -1278,9 +1278,9 @@ 
                           enable make rules and dependencies not useful (and
                           sometimes confusing) to the casual installer
   --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
+                          enable decimal float extension to C.  Selecting 'bid'
+                          or 'dpd' choses which decimal floating point format
+                          to use
   --enable-tls            Use thread-local storage [default=yes]
 
 Optional Packages:
@@ -3634,42 +3634,77 @@ 
 decimal_float=$libgcc_cv_dfp
 
 
-# Check whether --enable-decimal-float was given.
+
+  # Enable C extension for decimal float if target supports it.
+  # Check whether --enable-decimal-float was given.
 if test "${enable_decimal_float+set}" = set; then :
   enableval=$enable_decimal_float;
-  case $enable_decimal_float in
-    yes | no | bid | dpd) ;;
-    *) as_fn_error "'$enable_decimal_float' is an invalid value for --enable-decimal-float.
-Valid choices are 'yes', 'bid', 'dpd', and 'no'." "$LINENO" 5 ;;
-  esac
+    case $enable_decimal_float in
+      yes | no | bid | dpd) ;;
+      *) as_fn_error "'$enable_decimal_float' is an invalid value for --enable-decimal-float.
+  Valid choices are 'yes', 'bid', 'dpd', and 'no'." "$LINENO" 5 ;;
+    esac
 
 else
 
-  case $host in
-    powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
-      enable_decimal_float=yes
-      ;;
-    *)
-      enable_decimal_float=no
-      ;;
-  esac
+    case $target in
+      powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux* | \
+      i?86*-*-mingw* | x86_64*-*-mingw* | \
+      i?86*-*-cygwin*)
+        enable_decimal_float=yes
+        ;;
+      *)
+        { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: decimal float is not supported for this target" >&5
+$as_echo "$as_me: WARNING: decimal float is not supported for this target" >&2;}
+        enable_decimal_float=no
+        ;;
+    esac
 
 fi
 
 
-# x86's use BID format instead of DPD
-if test x$enable_decimal_float = xyes; then
-  case $host in
-    i?86*-*-linux* | x86_64*-*-linux*)
-      enable_decimal_float=bid
+  dfp=`if test $enable_decimal_float != no; then echo 1; else echo 0; fi`
+
+cat >>confdefs.h <<_ACEOF
+#define ENABLE_DECIMAL_FLOAT $dfp
+_ACEOF
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for decimal floating point" >&5
+$as_echo_n "checking for decimal floating point... " >&6; }
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $enable_decimal_float" >&5
+$as_echo "$enable_decimal_float" >&6; }
+
+  # x86's use BID format instead of DPD
+  case x$enable_decimal_float in
+    xyes)
+      case $target in
+        i?86*-*-linux* | x86_64*-*-linux* | \
+        i?86*-*-mingw* | x86_64*-*-mingw* | \
+        i?86*-*-cygwin*)
+    enable_decimal_float=bid
+    ;;
+        *)
+    enable_decimal_float=dpd
+    ;;
+      esac
       ;;
-    *)
+    xno)
+      # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper
+      # dependency on libdecnumber.
       enable_decimal_float=dpd
       ;;
   esac
-fi
 
+  bid=`if test $enable_decimal_float = bid; then echo 1; else echo 0; fi`
 
+cat >>confdefs.h <<_ACEOF
+#define ENABLE_DECIMAL_BID_FORMAT $bid
+_ACEOF
+
+
+
+
+
 # Check for fixed-point support.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether fixed-point is supported" >&5
 $as_echo_n "checking whether fixed-point is supported... " >&6; }
Index: libgcc/configure.ac
===================================================================
--- libgcc/configure.ac	(revision 163756)
+++ libgcc/configure.ac	(working copy)
@@ -125,42 +125,8 @@ 
 decimal_float=$libgcc_cv_dfp
 AC_SUBST(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 $enable_decimal_float in
-    yes | no | bid | dpd) ;;
-    *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
-Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
-  esac
-],
-[
-  case $host in
-    powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
-      enable_decimal_float=yes
-      ;;
-    *)
-      enable_decimal_float=no
-      ;;
-  esac
-])
+GCC_DFP_TARGET
 
-# x86's use BID format instead of DPD
-if test x$enable_decimal_float = xyes; then
-  case $host in
-    i?86*-*-linux* | x86_64*-*-linux*)
-      enable_decimal_float=bid
-      ;;
-    *)
-      enable_decimal_float=dpd
-      ;;
-  esac
-fi
-AC_SUBST(enable_decimal_float)
-
 # Check for fixed-point support.
 AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
 	       [AC_COMPILE_IFELSE([_Sat _Fract x;], [libgcc_cv_fixed_point=yes],