diff --git a/src/cmd/cc/cc.h b/src/cmd/cc/cc.h
index b4537559475..eefe5bed9e7 100644
--- a/src/cmd/cc/cc.h
+++ b/src/cmd/cc/cc.h
@@ -61,7 +61,7 @@ typedef	struct	Bits	Bits;
 #define	NTERM		10
 #define	MAXALIGN	7
 
-#define	SIGN(n)		((vlong)1<<(n-1))
+#define	SIGN(n)		((uvlong)1<<(n-1))
 #define	MASK(n)		(SIGN(n)|(SIGN(n)-1))
 
 #define	BITS	5
diff --git a/src/cmd/clean.bash b/src/cmd/clean.bash
index 14151d86d6e..41f4917d9e5 100644
--- a/src/cmd/clean.bash
+++ b/src/cmd/clean.bash
@@ -3,7 +3,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-for i in 6l 6a 6c 6g gc cc ar db nm blyacc acid
+for i in 6l 6a 6c 6g gc cc ar db nm blyacc acid cov prof
 do
 	cd $i
 	make clean
diff --git a/src/cmd/make.bash b/src/cmd/make.bash
index 103b17fa6f5..980659ff727 100644
--- a/src/cmd/make.bash
+++ b/src/cmd/make.bash
@@ -12,7 +12,7 @@ bash mkenam
 make enam.o
 cd ..
 
-for i in cc 6l 6a 6c gc 6g ar db nm blyacc acid
+for i in cc 6l 6a 6c gc 6g ar db nm blyacc acid cov prof
 do
 	echo; echo; echo %%%% making $i %%%%; echo
 	cd $i
diff --git a/src/cmd/prof/main.c b/src/cmd/prof/main.c
index a4223e75a8c..c4380b9b38b 100644
--- a/src/cmd/prof/main.c
+++ b/src/cmd/prof/main.c
@@ -321,13 +321,13 @@ main(int argc, char *argv[])
 		collapse = 0;
 		break;
 	case 'd':
-		delta_msec = atoi(EARGF(Usage));
+		delta_msec = atoi(EARGF(Usage()));
 		break;
 	case 't':
-		total_sec = atoi(EARGF(Usage));
+		total_sec = atoi(EARGF(Usage()));
 		break;
 	case 'p':
-		pid = atoi(EARGF(Usage));
+		pid = atoi(EARGF(Usage()));
 		break;
 	case 'f':
 		functions = 1;
diff --git a/src/lib/reflect/typestring.c b/src/lib/reflect/typestring.c
index a5e6398ad36..07144b3e06e 100644
--- a/src/lib/reflect/typestring.c
+++ b/src/lib/reflect/typestring.c
@@ -4,7 +4,7 @@
 
 extern char gotypestrings[];	// really a go String, but we don't have the definition here
 
-void FLUSH(void *v) { }
+void FLUSH(void*) { }
 
 void reflect·typestrings(void *s) {
 	s = gotypestrings;
diff --git a/src/runtime/runtime.c b/src/runtime/runtime.c
index ea2c4323964..766f16f6d48 100644
--- a/src/runtime/runtime.c
+++ b/src/runtime/runtime.c
@@ -674,6 +674,7 @@ memcopy(uint32 s, void *a, void *b)
 static uint64
 stringhash(uint32 s, string *a)
 {
+	USED(s);
 	return memhash((*a)->len, (*a)->str);
 }