Index: cfe/trunk/lib/Basic/Targets.cpp
===================================================================
--- cfe/trunk/lib/Basic/Targets.cpp
+++ cfe/trunk/lib/Basic/Targets.cpp
@@ -465,6 +465,8 @@
       Triple.getEnvironmentVersion(Maj, Min, Rev);
       this->PlatformName = "android";
       this->PlatformMinVersion = VersionTuple(Maj, Min, Rev);
+      if (Maj)
+        Builder.defineMacro("__ANDROID_API__", Twine(Maj));
     }
     if (Opts.POSIXThreads)
       Builder.defineMacro("_REENTRANT");
Index: cfe/trunk/test/Preprocessor/init.c
===================================================================
--- cfe/trunk/test/Preprocessor/init.c
+++ cfe/trunk/test/Preprocessor/init.c
@@ -8497,6 +8497,7 @@
 // NORTTI:#define __STDC__ 1
 //
 // RUN: %clang_cc1 -triple arm-linux-androideabi -E -dM < /dev/null | FileCheck -match-full-lines -check-prefix ANDROID %s
+// ANDROID-NOT:#define __ANDROID_API__
 // ANDROID:#define __ANDROID__ 1
 //
 // RUN: %clang_cc1 -x c++ -triple i686-linux-android -E -dM < /dev/null | FileCheck -match-full-lines -check-prefix I386-ANDROID-CXX %s
@@ -8505,6 +8506,10 @@
 // RUN: %clang_cc1 -x c++ -triple x86_64-linux-android -E -dM < /dev/null | FileCheck -match-full-lines -check-prefix X86_64-ANDROID-CXX %s
 // X86_64-ANDROID-CXX:#define __STDCPP_DEFAULT_NEW_ALIGNMENT__ 16UL
 //
+// RUN: %clang_cc1 -triple arm-linux-androideabi20 -E -dM < /dev/null | FileCheck -match-full-lines -check-prefix ANDROID20 %s
+// ANDROID20:#define __ANDROID_API__ 20
+// ANDROID20:#define __ANDROID__ 1
+//
 // RUN: %clang_cc1 -triple lanai-unknown-unknown -E -dM < /dev/null | FileCheck -match-full-lines -check-prefix LANAI %s
 // LANAI: #define __lanai__ 1
 //