2 # Copyright (C) 2008 The Android Open Source Project
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at
8 # http://www.apache.org/licenses/LICENSE-2.0
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS,
12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
18 # Handle various build version information.
20 # Guarantees that the following are defined:
22 # PLATFORM_SDK_VERSION
23 # PLATFORM_VERSION_CODENAME
24 # DEFAULT_APP_TARGET_SDK
29 # Look for an optional file containing overrides of the defaults,
30 # but don't cry if we don't find it. We could just use -include, but
31 # the build.prop target also wants INTERNAL_BUILD_ID_MAKEFILE to be set
34 INTERNAL_BUILD_ID_MAKEFILE := $(wildcard $(BUILD_SYSTEM)/build_id.mk)
35 ifneq "" "$(INTERNAL_BUILD_ID_MAKEFILE)"
36 include $(INTERNAL_BUILD_ID_MAKEFILE)
39 ifeq "" "$(PLATFORM_VERSION)"
40 # This is the canonical definition of the platform version,
41 # which is the version that we reveal to the end user.
42 # Update this value when the platform version changes (rather
43 # than overriding it somewhere else). Can be an arbitrary string.
47 ifeq "" "$(PLATFORM_SDK_VERSION)"
48 # This is the canonical definition of the SDK version, which defines
49 # the set of APIs and functionality available in the platform. It
50 # is a single integer that increases monotonically as updates to
51 # the SDK are released. It should only be incremented when the APIs for
52 # the new release are frozen (so that developers don't write apps against
53 # intermediate builds). During development, this number remains at the
54 # SDK version the branch is based on and PLATFORM_VERSION_CODENAME holds
55 # the code-name of the new development work.
56 PLATFORM_SDK_VERSION := 23
59 ifeq "" "$(PLATFORM_VERSION_CODENAME)"
60 # This is the current development code-name, if the build is not a final
61 # release build. If this is a final release build, it is simply "REL".
62 PLATFORM_VERSION_CODENAME := MNC
64 # This is all of the development codenames that are active. Should be either
65 # the same as PLATFORM_VERSION_CODENAME or a comma-separated list of additional
66 # codenames after PLATFORM_VERSION_CODENAME.
67 PLATFORM_VERSION_ALL_CODENAMES := $(PLATFORM_VERSION_CODENAME)
70 ifeq "REL" "$(PLATFORM_VERSION_CODENAME)"
71 PLATFORM_PREVIEW_SDK_VERSION := 0
73 ifeq "" "$(PLATFORM_PREVIEW_SDK_VERSION)"
74 # This is the definition of a preview SDK version over and above the current
75 # platform SDK version. Unlike the platform SDK version, a higher value
76 # for preview SDK version does NOT mean that all prior preview APIs are
77 # included. Packages reading this value to determine compatibility with
78 # known APIs should check that this value is precisely equal to the preview
79 # SDK version the package was built for, otherwise it should fall back to
80 # assuming the device can only support APIs as of the previous official
82 # This value will always be 0 for release builds.
83 PLATFORM_PREVIEW_SDK_VERSION := 2
87 ifeq "" "$(DEFAULT_APP_TARGET_SDK)"
88 # This is the default minSdkVersion and targetSdkVersion to use for
89 # all .apks created by the build system. It can be overridden by explicitly
90 # setting these in the .apk's AndroidManifest.xml. It is either the code
91 # name of the development build or, if this is a release build, the official
92 # SDK version of this release.
93 ifeq "REL" "$(PLATFORM_VERSION_CODENAME)"
94 DEFAULT_APP_TARGET_SDK := $(PLATFORM_SDK_VERSION)
96 DEFAULT_APP_TARGET_SDK := $(PLATFORM_VERSION_CODENAME)
100 ifeq "" "$(BUILD_ID)"
101 # Used to signify special builds. E.g., branches and/or releases,
102 # like "M5-RC7". Can be an arbitrary string, but must be a single
103 # word and a valid file name.
105 # If there is no BUILD_ID set, make it obvious.
109 ifeq "" "$(BUILD_NUMBER)"
110 # BUILD_NUMBER should be set to the source control value that
111 # represents the current state of the source code. E.g., a
112 # perforce changelist number or a git hash. Can be an arbitrary string
113 # (to allow for source control that uses something other than numbers),
114 # but must be a single word and a valid file name.
116 # If no BUILD_NUMBER is set, create a useful "I am an engineering build
117 # from this date/time" value. Make it start with a non-digit so that
118 # anyone trying to parse it as an integer will probably get "0".
119 BUILD_NUMBER := eng.$(USER).$(shell date +%Y%m%d.%H%M%S)