os: Plan 9 support.
R=rsc, ality, r, r2
CC=golang-dev
https://golang.org/cl/4149046
diff --git a/src/pkg/os/Makefile b/src/pkg/os/Makefile
index 3a81afe..985fd11 100644
--- a/src/pkg/os/Makefile
+++ b/src/pkg/os/Makefile
@@ -19,29 +19,48 @@
types.go\
GOFILES_freebsd=\
+ error_posix.go\
env_unix.go\
+ file_posix.go\
file_unix.go\
sys_bsd.go\
+ exec_posix.go\
exec_unix.go\
GOFILES_darwin=\
+ error_posix.go\
env_unix.go\
+ file_posix.go\
file_unix.go\
sys_bsd.go\
+ exec_posix.go\
exec_unix.go\
GOFILES_linux=\
+ error_posix.go\
env_unix.go\
+ file_posix.go\
file_unix.go\
sys_linux.go\
+ exec_posix.go\
exec_unix.go\
GOFILES_windows=\
+ error_posix.go\
env_windows.go\
+ file_posix.go\
file_windows.go\
sys_windows.go\
+ exec_posix.go\
exec_windows.go\
+GOFILES_plan9=\
+ error_plan9.go\
+ env_plan9.go\
+ file_plan9.go\
+ sys_plan9.go\
+ exec_plan9.go\
+
GOFILES+=$(GOFILES_$(GOOS))
include ../../Make.pkg
