runtime: fix void warnings

Add -V flag to 6c command line to keep them fixed.

R=ken2
CC=golang-dev
https://golang.org/cl/4930046

src/pkg/runtime/Makefile

@@ -13,7 +13,7 @@ SIZE_arm=32
 SIZE=$(SIZE_$(GOARCH))
 
 CFLAGS_windows=-D__WINDOWS__
-CFLAGS=-I$(GOOS) -I$(GOARCH) -I$(GOOS)/$(GOARCH) -wF $(CFLAGS_$(GOARCH)) $(CFLAGS_$(GOOS))
+CFLAGS=-I$(GOOS) -I$(GOARCH) -I$(GOOS)/$(GOARCH) -FVw $(CFLAGS_$(GOARCH)) $(CFLAGS_$(GOOS))
 
 GOFILES=\
 	debug.go\

src/pkg/runtime/chan.c

@@ -105,7 +105,7 @@ runtime·makechan_c(ChanType *t, int64 hint)
 	// allocate memory in one call
 	c = (Hchan*)runtime·mal(n + hint*elem->size);
 	if(runtime·destroylock)
-		runtime·addfinalizer(c, destroychan, 0);
+		runtime·addfinalizer(c, (void*)destroychan, 0);
 
 	c->elemsize = elem->size;
 	c->elemalg = &runtime·algarray[elem->alg];

src/pkg/runtime/proc.c

@@ -1604,7 +1604,7 @@ os·setenv_c(String k, String v)
 	runtime·memmove(arg[1], v.str, v.len);
 	arg[1][v.len] = 0;
 
-	runtime·asmcgocall(libcgo_setenv, arg);
+	runtime·asmcgocall((void*)libcgo_setenv, arg);
 	runtime·free(arg[0]);
 	runtime·free(arg[1]);
 }

src/pkg/runtime/runtime.c

@@ -638,20 +638,20 @@ runtime·algarray[] =
 {
 [AMEM]	{ memhash, memequal, memprint, memcopy },
 [ANOEQ]	{ runtime·nohash, runtime·noequal, memprint, memcopy },
-[ASTRING]	{ strhash, strequal, strprint, strcopy },
-[AINTER]		{ interhash, interequal, interprint, intercopy },
-[ANILINTER]	{ nilinterhash, nilinterequal, nilinterprint, nilintercopy },
-[ASLICE]	{ runtime·nohash, runtime·noequal, memprint, slicecopy },
-[AMEM8]		{ memhash, memequal8, memprint, memcopy8 },
-[AMEM16]	{ memhash, memequal16, memprint, memcopy16 },
-[AMEM32]	{ memhash, memequal32, memprint, memcopy32 },
-[AMEM64]	{ memhash, memequal64, memprint, memcopy64 },
-[AMEM128]	{ memhash, memequal128, memprint, memcopy128 },
-[ANOEQ8]	{ runtime·nohash, runtime·noequal, memprint, memcopy8 },
-[ANOEQ16]	{ runtime·nohash, runtime·noequal, memprint, memcopy16 },
-[ANOEQ32]	{ runtime·nohash, runtime·noequal, memprint, memcopy32 },
-[ANOEQ64]	{ runtime·nohash, runtime·noequal, memprint, memcopy64 },
-[ANOEQ128]	{ runtime·nohash, runtime·noequal, memprint, memcopy128 },
+[ASTRING]	{ (void*)strhash, (void*)strequal, (void*)strprint, (void*)strcopy },
+[AINTER]		{ (void*)interhash, (void*)interequal, (void*)interprint, (void*)intercopy },
+[ANILINTER]	{ (void*)nilinterhash, (void*)nilinterequal, (void*)nilinterprint, (void*)nilintercopy },
+[ASLICE]	{ (void*)runtime·nohash, (void*)runtime·noequal, (void*)memprint, (void*)slicecopy },
+[AMEM8]		{ memhash, (void*)memequal8, memprint, (void*)memcopy8 },
+[AMEM16]	{ memhash, (void*)memequal16, memprint, (void*)memcopy16 },
+[AMEM32]	{ memhash, (void*)memequal32, memprint, (void*)memcopy32 },
+[AMEM64]	{ memhash, (void*)memequal64, memprint, (void*)memcopy64 },
+[AMEM128]	{ memhash, (void*)memequal128, memprint, (void*)memcopy128 },
+[ANOEQ8]	{ runtime·nohash, runtime·noequal, memprint, (void*)memcopy8 },
+[ANOEQ16]	{ runtime·nohash, runtime·noequal, memprint, (void*)memcopy16 },
+[ANOEQ32]	{ runtime·nohash, runtime·noequal, memprint, (void*)memcopy32 },
+[ANOEQ64]	{ runtime·nohash, runtime·noequal, memprint, (void*)memcopy64 },
+[ANOEQ128]	{ runtime·nohash, runtime·noequal, memprint, (void*)memcopy128 },
 };
 
 int64

src/pkg/runtime/runtime.h

@@ -630,8 +630,8 @@ void	runtime·mapiterkeyvalue(struct hash_iter*, void*, void*);
 Hmap*	runtime·makemap_c(MapType*, int64);
 
 Hchan*	runtime·makechan_c(ChanType*, int64);
-void	runtime·chansend(ChanType*, Hchan*, void*, bool*);
-void	runtime·chanrecv(ChanType*, Hchan*, void*, bool*, bool*);
+void	runtime·chansend(ChanType*, Hchan*, byte*, bool*);
+void	runtime·chanrecv(ChanType*, Hchan*, byte*, bool*, bool*);
 int32	runtime·chanlen(Hchan*);
 int32	runtime·chancap(Hchan*);
 bool	runtime·showframe(Func*);