--- gforth/configure.in	2003/07/31 20:47:18	1.123
+++ gforth/configure.in	2003/08/06 09:35:49	1.126
@@ -309,9 +309,9 @@ AC_MSG_RESULT($ac_nostrictaliasing)
 AC_MSG_CHECKING([if $CC understands -fno-crossjumping])
 CFLAGS_1="$CFLAGS"
 CFLAGS="$CFLAGS -fno-crossjumping"
-AC_TRY_COMPILE(,,ac_nocrossjump=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-crossjumping",ac_nocrossjump=no)
+AC_TRY_COMPILE(,,ac_nocrossjumping=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-crossjumping",ac_nocrossjumping=no)
 CFLAGS="$CFLAGS_1"
-AC_MSG_RESULT($ac_nocrossjump)
+AC_MSG_RESULT($ac_nocrossjumping)
 
 AC_CHECK_PROG(asm_fs,asm.fs,arch/$machine/asm.fs,,$srcdir/arch/$machine)
 AC_SUBST(asm_fs)
@@ -431,6 +431,15 @@ 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_CHECK_LIB(dl,dlopen)
+dnl check for ffcall libraries
+dnl unfortunately, these four calls are separated out into a library each.
+AC_CHECK_LIB(avcall,__builtin_avcall)
+AC_CHECK_LIB(callback,__vacall_r)
+AC_CHECK_LIB(vacall,vacall)
+AC_CHECK_LIB(trampoline,alloc_trampoline)
+FFCALLFLAG="false"
+test $ac_cv_lib_avcall___builtin_avcall = yes && FFCALLFLAG="true" && AC_DEFINE(HAS_FFCALL,,[define this if you want to use the ffcall libraries])
+AC_SUBST(FFCALLFLAG)
 if test "$host_os" != "nextstep3"
 then
 	AC_FUNC_MEMCMP