[clang] 0849047 - Add a less ambiguous macro for Android version.

[Dan Albert via cfe-commits]

Author: Dan Albert
Date: 2020-12-02T13:26:28-08:00
New Revision: 0849047860a343d8bcf1f828a82d585e89079943

URL: https://github.com/llvm/llvm-project/commit/0849047860a343d8bcf1f828a82d585e89079943
DIFF: https://github.com/llvm/llvm-project/commit/0849047860a343d8bcf1f828a82d585e89079943.diff

LOG: Add a less ambiguous macro for Android version.

Android has a handful of API levels relevant to developers described
here: https://developer.android.com/studio/build#module-level.
`__ANDROID_API__` is too vague and confuses a lot of people. Introduce
a new macro name that is explicit about which one it represents. Keep
the old name around because code has been using it for a decade.

Added: 
    

Modified: 
    clang/lib/Basic/Targets/OSTargets.h
    clang/test/Preprocessor/init.c

Removed: 
    


################################################################################
diff  --git a/clang/lib/Basic/Targets/OSTargets.h b/clang/lib/Basic/Targets/OSTargets.h
index 60e47bcacbf4..0d5d6f553093 100644
--- a/clang/lib/Basic/Targets/OSTargets.h
+++ b/clang/lib/Basic/Targets/OSTargets.h
@@ -383,8 +383,12 @@ class LLVM_LIBRARY_VISIBILITY LinuxTargetInfo : public OSTargetInfo<Target> {
       Triple.getEnvironmentVersion(Maj, Min, Rev);
       this->PlatformName = "android";
       this->PlatformMinVersion = VersionTuple(Maj, Min, Rev);
-      if (Maj)
-        Builder.defineMacro("__ANDROID_API__", Twine(Maj));
+      if (Maj) {
+        Builder.defineMacro("__ANDROID_MIN_SDK_VERSION__", Twine(Maj));
+        // This historical but ambiguous name for the minSdkVersion macro. Keep
+        // defined for compatibility.
+        Builder.defineMacro("__ANDROID_API__", "__ANDROID_MIN_SDK_VERSION__");
+      }
     } else {
         Builder.defineMacro("__gnu_linux__");
     }

diff  --git a/clang/test/Preprocessor/init.c b/clang/test/Preprocessor/init.c
index 079ec6e021f8..e599d9afb42e 100644
--- a/clang/test/Preprocessor/init.c
+++ b/clang/test/Preprocessor/init.c
@@ -1397,6 +1397,7 @@
 //
 // 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-NOT:#define __ANDROID_MIN_SDK_VERSION__
 // ANDROID:#define __ANDROID__ 1
 // ANDROID-NOT:#define __gnu_linux__
 //
@@ -1407,7 +1408,8 @@
 // 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_API__ __ANDROID_MIN_SDK_VERSION__
+// ANDROID20:#define __ANDROID_MIN_SDK_VERSION__ 20
 // ANDROID20:#define __ANDROID__ 1
 // ANDROID-NOT:#define __gnu_linux__
 //