diagnose missing symbols instead of

silently miscompiling.

R=rsc
OCL=22872
CL=22872

src/cmd/6l/asm.c

@@ -708,6 +708,8 @@ datblk(int32 s, int32 n)
 				if(p->to.sym) {
 					if(p->to.sym->type == SUNDEF)
 						ckoff(p->to.sym, o);
+					if(p->to.sym->type == Sxxx)
+						diag("missing symbol %s", p->to.sym->name);
 					o += p->to.sym->value;
 					if(p->to.sym->type != STEXT && p->to.sym->type != SUNDEF)
 						o += INITDAT;

src/cmd/6l/go.c

@@ -487,6 +487,6 @@ definetypesigs(void)
 	prog->to.offset = n;
 
 	if(debug['v'])
-		Bprint(&bso, "%5.2f typestrings %d\n", cputime(), n);
+		Bprint(&bso, "%5.2f typesigs %d\n", cputime(), n);
 
 }

src/cmd/6l/l.h

@@ -137,6 +137,7 @@ struct	Movtab
 
 enum
 {
+	Sxxx,
 	STEXT		= 1,
 	SDATA,
 	SBSS,