diff --git a/src/m/ncr386.h b/src/m/ncr386.h
new file mode 100644
index 00000000000..2599456a873
--- /dev/null
+++ b/src/m/ncr386.h
@@ -0,0 +1,15 @@
+#include "intel386.h"
+
+#ifndef __GNUC__
+/* Allow emacs to link with "bcopy()" unresolved.  Works around a
+   problem where /usr/lib/libX11.so provides bcopy, but
+   /usr/ccs/lib/libX11.so does not.  */
+#define LD_SWITCH_X_DEFAULT -Wl,-z,nodefs
+#else /* __GNUC__ */
+
+/* Assuming we are using GNU ld, pass a -R option to it
+   so that shared libraries will be found at execution time
+   just as they are found at link time.  */
+#define LD_SWITCH_X_DEFAULT -Xlinker LD_SWITCH_X_SITE_AUX
+
+#endif /* __GNUC__ */