It fails to produce common.o when system load is high:

| In file included from common.c:57:
| ../include/defs.h:49:10: fatal error: y.tab.h: No such file or directory
|    49 | #include "y.tab.h"
|       |          ^~~~~~~~~
| compilation terminated.

Make $(COMMONOBJS) which include common.o to depends on related header files
and y.tab.h to fix the parallel build failure.

Upstream-Status: Inappropriate [no upstream]

Signed-off-by: Kai Kang <kai.kang@windriver.com>
---
 src/Makefile.real | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Makefile.real b/src/Makefile.real
index e0f0dfc..53d4944 100644
--- a/src/Makefile.real
+++ b/src/Makefile.real
@@ -41,7 +41,7 @@ $(SERVER_BIN): $(SERVEROBJS) $(COMMONOBJS) $(MISSINGOBJS)
 $(CLIENT_BIN): $(CLIENTOBJS) $(COMMONOBJS) $(MISSINGOBJS)
 	$(CC) -o $@ $(CLIENTOBJS) $(COMMONOBJS) $(MISSINGOBJS) $(LIBS) $(LDFLAGS)
 
-$(CLIENTOBJS) $(SERVEROBJS): $(HFILES) y.tab.h
+$(COMMONOBJS) $(CLIENTOBJS) $(SERVEROBJS): $(HFILES) y.tab.h
 
 y.tab.h: gram.c