--- gforth/configure.in	2010/07/25 14:33:01	1.278
+++ gforth/configure.in	2010/09/15 18:28:23	1.284
@@ -20,7 +20,7 @@ dnl Process this file with autoconf to p
 
 dnl We use some automake macros here,
 dnl but don't use automake for creating Makefile.in
-AC_INIT([gforth],[0.7.0-20100725],[https://savannah.gnu.org/bugs/?func=addbug&group=gforth])
+AC_INIT([gforth],[0.7.0-20100915],[https://savannah.gnu.org/bugs/?func=addbug&group=gforth])
 AC_PREREQ(2.54)
 #snapshots have numbers major.minor.release-YYYYMMDD
 #note that lexicographic ordering must be heeded.
@@ -242,14 +242,20 @@ case "$host_cpu" in
 		;;
 	i486)
 		machine=386
-		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -m486"
+		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr"
+		CFLAGS_1="$CFLAGS"
+		CFLAGS="$CFLAGS -march=i486"
+		AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1 -m486")
+		AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1")
 		;;
 	i*86)
 		machine=386
 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr"
 		CFLAGS_1="$CFLAGS"
-		CFLAGS="$CFLAGS -march=pentium"
+		CFLAGS="$CFLAGS -march=pentium -mtune=generic"
+		AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1 -march=pentium")
 		AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1 -m486")
+		AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1")
 		;;
 	x86_64)
 		case $CC
@@ -282,6 +288,7 @@ case "$host_cpu" in
 		;;
 	mips*)
 		machine=mips
+		AC_LIBOBJ(../arch/mips/check_prim) 
 		#dynamic native code has the following problems on MIPS:
 		#
 		#1) J/JAL seems relocatable, but is are only
@@ -807,7 +814,11 @@ fi
 #echo "CFLAGS=$CFLAGS"
 #echo "ac_link=$ac_link"
 AC_MSG_CHECKING([if and how we can waste code space])
-if test -z "$skipcode"; then
+if test -z "$skipcode" && test x$cross_compiling = xyes; then
+   # we cannot perform the AC_TRY_RUN check when cross-compiling.  
+   skipcode=no
+   AC_MSG_RESULT([$skipcode, can't run checks since cross-compiling])
+elif test -z "$skipcode"; then
     skipcode=no
     CFLAGS_1="$CFLAGS"
     CFLAGS="$CFLAGS $ENGINE_FLAGS"
@@ -845,7 +856,7 @@ then
 	no_dynamic_default=1
 	AC_MSG_WARN(Disabling default dynamic native code generation)
     fi
-    AC_DEFINE_UNQUOTED(SKIP16,((void)0),statement for skipping 16 bytes)
+    AC_DEFINE_UNQUOTED(SKIP16,asm(""),statement for skipping 16 bytes)
 else
     AC_DEFINE_UNQUOTED(SKIP16,asm("$skipcode"),statement for skipping 16 bytes)
 fi