--- gcc/config/i386/x-isc3	2018/04/24 18:10:27	1.1
+++ gcc/config/i386/x-isc3	2018/04/24 18:30:59	1.1.1.2
@@ -1,5 +1,4 @@
 CLIB = -lPW
 # One person said it needs -DPOSIX_JC, but daa@CERF.NET says no.
-X_CFLAGS = -D_SYSV3
+X_CFLAGS = -D_SYSV3 -Xp
 ENQUIRE_LDFLAGS = $(LDFLAGS)
-INSTALL_HEADERS_DIR = install-headers-cpio