add build step to install debuggers setgid procmod.

they have to go in /usr/local/bin
because the setgid bit is ignored in /Users.

R=r
DELTA=54  (49 added, 0 deleted, 5 changed)
OCL=19424
CL=19463

src/cmd/cov/Makefile

@@ -22,7 +22,14 @@ $(TARG): $(OFILES)
 clean:
 	rm -f $(OFILES) $(TARG)
 
-install: $(TARG)
+install: install-$(GOOS)
+install-linux: install-default
+
+# on Darwin, have to install and setgid; see $GOROOT/src/sudo.bash
+install-darwin: $(TARG)
+	@true
+
+install-default: $(TARG)
 	cp $(TARG) $(BIN)/$(TARG)
 
 $(OFILES): $(HFILES)

src/cmd/prof/Makefile

@@ -22,7 +22,14 @@ $(TARG): $(OFILES)
 clean:
 	rm -f $(OFILES) $(TARG)
 
-install: $(TARG)
+install: install-$(GOOS)
+install-linux: install-default
+
+# on Darwin, have to install and setgid; see $GOROOT/src/sudo.bash
+install-darwin: $(TARG)
+	@true
+
+install-default: $(TARG)
 	cp $(TARG) $(BIN)/$(TARG)
 
 $(OFILES): $(HFILES)

src/make.bash

@@ -28,3 +28,9 @@ do
 	cd ..
 done
 
+case "`uname`" in
+Darwin)
+	echo;
+	echo %%% run sudo.bash to install debuggers
+	echo
+esac

src/sudo.bash

+#!/bin/bash
+# Copyright 2009 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+case "`uname`" in
+Darwin)
+	;;
+*)
+	exit 0
+esac
+
+for i in acid db prof cov
+do
+	sudo cp $GOROOT/src/cmd/$i/6$i /usr/local/bin/6$i
+	sudo chgrp procmod /usr/local/bin/6$i
+	sudo chmod g+s /usr/local/bin/6$i
+done