Convert ptrace to whole-package compilation.

R=rsc
APPROVED=rsc
DELTA=15  (9 added, 6 deleted, 0 changed)
OCL=33136
CL=33136

usr/austin/ptrace/Makefile

+# 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.
+
+include $(GOROOT)/src/Make.$(GOARCH)
+
+TARG=ptrace
+GOFILES=\
+	process.go\
+	ptrace_linux.go\
+	regs_$(GOOS)_$(GOARCH).go\
+
+include $(GOROOT)/src/Make.pkg

usr/austin/ptrace/ptrace_linux.go

@@ -9,7 +9,6 @@ import (
 	"fmt";
 	"io";
 	"os";
-	"ptrace";
 	"runtime";
 	"strconv";
 	"strings";
@@ -98,8 +97,6 @@ func (ts threadState) String() string {
  * Basic types
  */
 
-type thread struct
-
 // A breakpoint stores information about a single breakpoint,
 // including its program counter, the overwritten text if the
 // breakpoint is installed.
@@ -176,8 +173,6 @@ type thread struct {
 	exitStatus int;
 }
 
-func (p *process) newThread(tid int, signal int, cloned bool) (*thread, os.Error)
-
 /*
  * Errors
  */

usr/austin/ptrace/regs_linux_amd64.go

@@ -6,7 +6,6 @@ package ptrace
 
 import (
 	"os";
-	"ptrace";
 	"strconv";
 	"syscall";
 )