add mutex.Mutex

R=r
DELTA=349  (348 added, 0 deleted, 1 changed)
OCL=20380
CL=20472
diff --git a/src/lib/sync/Makefile b/src/lib/sync/Makefile
new file mode 100644
index 0000000..86aeeef
--- /dev/null
+++ b/src/lib/sync/Makefile
@@ -0,0 +1,56 @@
+# 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.
+
+# DO NOT EDIT.  Automatically generated by gobuild.
+# gobuild -m >Makefile
+O=6
+GC=$(O)g
+CC=$(O)c -w
+AS=$(O)a
+AR=$(O)ar
+
+default: packages
+
+clean:
+	rm -f *.$O *.a $O.out
+
+test: packages
+	gotest
+
+coverage: packages
+	gotest
+	6cov -g `pwd` | grep -v '_test\.go:'
+
+%.$O: %.go
+	$(GC) $*.go
+
+%.$O: %.c
+	$(CC) $*.c
+
+%.$O: %.s
+	$(AS) $*.s
+
+O1=\
+	asm_$(GOARCH).$O\
+	mutex.$O\
+
+sync.a: a1
+
+a1:	$(O1)
+	$(AR) grc sync.a asm_$(GOARCH).$O mutex.$O
+	rm -f $(O1)
+
+newpkg: clean
+	$(AR) grc sync.a
+
+$(O1): newpkg
+
+nuke: clean
+	rm -f $(GOROOT)/pkg/sync.a
+
+packages: sync.a
+
+install: packages
+	cp sync.a $(GOROOT)/pkg/sync.a
+