[NaCl SDK] getos.py now checks against the Cr-Commit-Position.

native_client_sdk/src/tools/common.mk

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 #
 # GNU Make based build file.  For details on GNU Make see:
 #   http://www.gnu.org/software/make/manual/make.html
 #
 
 #
@@ skipping 186 matching lines @@
 
 
 #
 # Compute path to requested NaCl Toolchain
 #
 TC_PATH := $(abspath $(NACL_SDK_ROOT)/toolchain)
 
 
 #
 # Check for required minimum SDK version.
+# A makefile can declare NACL_SDK_VERSION_MIN of the form "<major>.<position>",
+# where <major> is the major Chromium version number, and <position> is the
+# Chromium Cr-Commit-Position number. eg. "39.295386".
 #
 ifdef NACL_SDK_VERSION_MIN
   VERSION_CHECK:=$(shell $(GETOS) --check-version=$(NACL_SDK_VERSION_MIN) 2>&1)
   ifneq ($(VERSION_CHECK),)
     $(error $(VERSION_CHECK))
   endif
 endif
 
 
 #
@@ skipping 312 matching lines @@
 # uppercase aliases (for backward compatibility)
 .PHONY: CHECK_FOR_CHROME DEBUG LAUNCH RUN
 CHECK_FOR_CHROME: check_for_chrome
 DEBUG: debug
 LAUNCH: run
 RUN: run
 
 endif  # TOOLCHAIN is valid...
 
 endif  # TOOLCHAIN=all