g4 open sysimport.c before writing it

R=r
DELTA=1  (1 added, 0 deleted, 0 changed)
OCL=21577
CL=21603

diff --git a/src/cmd/gc/Makefile b/src/cmd/gc/Makefile
index 10afbc5d9774a07cfa5c1cce01fc71abc34d8e15..6c8834d2f29b9a328bc648eddb4799b3deb77539 100644 (file)
--- a/src/cmd/gc/Makefile
+++ b/src/cmd/gc/Makefile
@@ -46,6 +46,7 @@ y.tab.c: y.tab.h
 # than sys.go (or unsafe.go or mksys.c).
 sysimport.c:   sys.go unsafe.go mksys.c
        if test -x $(BIN)/6g; then \
+               p4 open sysimport.c; \
                gcc -o mksys mksys.c; \
                6g sys.go; \
                6g unsafe.go; \