--- gforth/configure.in	1999/03/02 15:37:32	1.50
+++ gforth/configure.in	2000/02/04 14:52:30	1.58
@@ -22,12 +22,12 @@ AC_INIT(engine/engine.c)
 
 dnl We use some automake macros here,
 dnl but don't use automake for creating Makefile.in
-AM_INIT_AUTOMAKE(gforth,0.4.0-19990101)
+AM_INIT_AUTOMAKE(gforth,0.4.9-19990617)
 #snapshots have numbers major.minor.release-YYYYMMDD
 #note that lexicographic ordering bust be heeded.
 #I.e., 0.4.1-YYYYMMDD must not exist before 0.4.1!
 AM_CONFIG_HEADER(engine/config.h)
-AM_CYGWIN32
+#AM_CYGWIN32
 
 AC_ARG_ENABLE(force-reg,
 [  --enable-force-reg	  Use explicit register declarations if they appear in
@@ -190,16 +190,32 @@ case "$host_cpu" in
 			AC_DEFINE(DIRECT_THREADED)
 		fi
 		;;
-	i586|i686)
+	i586)
 		machine=386
-		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem -m486"
+		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
+		CFLAGS_1="$CFLAGS"
+		CFLAGS="$CFLAGS -mpentium"
+		AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1 -m486")
 		if test "${enable_direct_threaded+set}" = "" \
 			-a "${enable_indirect_threaded+set}" = ""
 		then
-			echo "Using indirect threaded code on Pentium and up"
+			echo "Using indirect threaded code on Pentium/K5/K6"
 			AC_DEFINE(INDIRECT_THREADED)
 		fi
 		;;
+	i686)
+		machine=386
+		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
+		CFLAGS_1="$CFLAGS"
+		CFLAGS="$CFLAGS -mpentiumpro"
+		AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1 -m486")
+		if test "${enable_direct_threaded+set}" = "" \
+			-a "${enable_indirect_threaded+set}" = ""
+		then
+			echo "Using direct threaded code on PPro/Pentium II"
+			AC_DEFINE(DIRECT_THREADED)
+		fi
+		;;
         m68k)
 		machine=m68k
 		CFLAGS="$CFLAGS -fomit-frame-pointer"
@@ -227,6 +243,8 @@ case "$host_cpu" in
 		;;
 	alpha*)
 		machine=alpha
+		#full IEEE FP support for more uniformity across platforms:
+		CFLAGS="$CFLAGS -mieee"
 		;;
 	power*)
 		machine=power