--- gforth/configure.in	1995/04/14 18:56:53	1.11
+++ gforth/configure.in	1995/12/11 13:15:20	1.15
@@ -27,7 +27,21 @@ AC_ARG_WITH(debug,
                     debugging informations.],
 if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
 
+AC_PROG_CC
 
+if test "$GCC" = "yes"
+then
+   echo "Fine, gcc is available"
+else
+   cat <<'EOF'
+Gforth uses the GNU-C extensions for better performance. It does not work
+with other C compilers. Please install a new version of the GNU-C compiler, and
+try again.
+EOF
+   exit 1
+fi
+
+AC_SUBST(CC)
 AC_SUBST(GCCLDFLAGS)
 AC_SUBST(DEBUGFLAG)
 
@@ -45,7 +59,7 @@ case "$ac_cv_sizeof_char_p" in
 dnl    AC_CHECK_SIZEOF(long long)
 dnl    if [ $ac_cv_sizeof_long_long != 16 ]
 dnl    then
-dnl       try the whole thing with -mlonlong128
+dnl       try the whole thing with -mlonglong128
 dnl complain about C compiler and OS vendor
 dnl    fi
     ;;
@@ -66,7 +80,7 @@ case "$host_cpu" in
 		;;
 	i386|i486|i586)
 		mach_h=386
-		CFLAGS="-fforce-mem -fforce-addr -fomit-frame-pointer"
+		CFLAGS="-fomit-frame-pointer -fforce-addr -fforce-mem"
 		#!! direct/indirect threading switch
 		#!! -m486 flag
 		;;
@@ -91,6 +105,7 @@ case "$host_cpu" in
 		mach_h=32bit
 esac
 AC_SUBST(host)
+AC_SUBST(ENGINE_FLAGS)
 
 dnl Now a little support for DOS/DJGCC
 AC_SUBST(MAKE_EXE)
@@ -114,7 +129,7 @@ LINK_KERNL64B=""
 #then
 #  echo Configuring for DOS!!!
 #  MAKE_EXE="coff2exe gforth"
-#  LINK_KERNL32L='$(CP) kernl32l.fi gforth.fi'
+#  LINK_KERNL32L='$(CP) kernl32l.fi kernal.fi'
 #fi
 
 dnl the following macro produces a warning with autoconf-2.1
@@ -138,7 +153,7 @@ dnl This check is just for making later
 dnl using sin here is no good idea since it is built-into gcc and typechecked
 AC_CHECK_LIB(m,asin)
 AC_FUNC_MEMCMP
-AC_REPLACE_FUNCS(memmove strtoul pow10)
+AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal)
 AC_CHECK_FUNC(getopt_long,getopt_long="",getopt_long="getopt.o getopt1.o")
 AC_SUBST(getopt_long)
 AC_CHECK_FUNCS(rint expm1 log1p)
@@ -146,9 +161,9 @@ AC_REPLACE_FUNCS(ecvt)
 dnl No check for select, because our replacement is no good under
 dnl anything but DOS
 
-gforth_fi=kernl${wordsize}${bytesex}.fi
-AC_SUBST(gforth_fi)
+kernal_fi=kernl${wordsize}${bytesex}.fi
+AC_SUBST(kernal_fi)
 
-AC_LINK_FILES(${mach_h}.h $gforth_fi,machine.h gforth.fi)
+AC_LINK_FILES(${mach_h}.h $kernal_fi,machine.h kernal.fi)
 AC_OUTPUT(Makefile)