auto test both. logic is correct now. seems to work

Makefile

@@ -29,7 +29,8 @@ auto:
 	rm -f auto.sort.pb.go auto.newsort.pb.go # auto.marshal.pb.go
 
 test:
-	make -C example full
+	make -C example rawproto
+	make -C example modproto
 
 junk:
 	cd example; rm -f go.* *.pb.go

example/Makefile

@@ -1,7 +1,10 @@
 VERSION = $(shell git describe --tags)
 BUILDTIME = $(shell date +%Y.%m.%d_%H%M)
 
-full: clean auto goimports vet build
+modproto: clean withMutex goimports vet build
+	./example
+
+rawproto: clean withoutMutex goimports vet build
 	./example
 
 vet:
@@ -10,9 +13,12 @@ vet:
 build:
 	GO111MODULE=off go build
 
-auto:
+withMutex:
 	../autogenpb --proto fruit.proto --package main --mutex
 
+withoutMutex:
+	../autogenpb --proto fruit.proto --package main
+
 goimports:
 	goimports -w *.go
 

sort.go

@@ -191,9 +191,10 @@ func (pf *File) appendUnique(w io.Writer, blah *MsgName, names map[string]string
 	var LOCK string = pf.Bases.Lockname
 
 	if argv.Mutex {
-		LOCK = pf.Bases.Lockname
-	} else {
+		// use the mutex lock from the modified protoc.pb.go file
 		LOCK = "all.Lock"
+	} else {
+		LOCK = pf.Bases.Lockname
 	}
 
 	fmt.Fprintln(w, "// enforces "+BASE+" is unique")