Add additional names of mingw tools.

diff --git a/configure.ac b/configure.ac
index 9421357..9b952f2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -946,9 +946,9 @@
     AC_SUBST(CROSSTEST,"")
     if test "$cross_compiling" = "no"
     then
-      AC_CHECK_PROGS(CROSSCC,i586-mingw32msvc-gcc i386-mingw32-gcc mingw-gcc,false)
-      AC_CHECK_PROGS(DLLTOOL,i586-mingw32msvc-dlltool i386-mingw32-dlltool mingw-dlltool,false)
-      AC_CHECK_PROGS(CROSSWINDRES,i586-mingw32msvc-windres i386-mingw32-windres mingw-windres,false)
+      AC_CHECK_PROGS(CROSSCC,i586-mingw32msvc-gcc i386-mingw32msvc-gcc i386-mingw32-gcc mingw-gcc,false)
+      AC_CHECK_PROGS(DLLTOOL,i586-mingw32msvc-dlltool i386-mingw32msvc-dlltool i386-mingw32-dlltool mingw-dlltool,false)
+      AC_CHECK_PROGS(CROSSWINDRES,i586-mingw32msvc-windres i386-mingw32msvc-windres i386-mingw32-windres mingw-windres,false)
       if test "$CROSSCC" != "false"; then CROSSTEST="\$(CROSSTEST)"; fi
     fi
     ;;