Support a prebuilt libFuzzer.a for use in Android target builds.android-vts-8.0_r2android-vts-8.0_r1oreo-dev

Bug: http://b/35432050

This change adds prebuilt rules for libFuzzer.a for each Android target
architecture. libFuzzer.a needs to be a prebuilt, because it must match
the host Clang compiler that is used to compile other code with it. We
previously were always "lucky" that our host Clang remained mostly
compatible with the on-device LLVM sources (which usually trail behind
the host compiler by a few weeks).

For expediency, we use a fixed version number for the host Clang
prebuilt to match the libFuzzer.a prebuilts. This requires that we
update yet another version number when we upgrade our toolchain, but it
is faster than generating a new set of rules in Soong for creating
"fuzz_test" executables.

Test: Builds vts fuzzer tests successfully.

(cherry picked from commit b705d67f188995750344296e80d67776e0252cc2)

Change-Id: Ic5bcfa95643a7e008fefef288813e0e0b5b8b8a0

1 files changed, 46 insertions, 0 deletions

diff --git a/Android.bp b/Android.bp
new file mode 100644
index 00000000..d9f1783c
--- /dev/null
+++ b/Android.bp
@@ -0,0 +1,46 @@
+//
+// Copyright (C) 2017 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+clang_version = "3859424"
+clang_libfuzzer_dir = "clang-" + clang_version + "/lib64/clang/4.0/lib/linux/"
+
+cc_prebuilt_library_static {
+    name: "libFuzzer",
+    export_include_dirs: ["clang-" + clang_version + "/prebuilt_include/llvm/lib/Fuzzer/"],
+    target: {
+        android_arm: {
+            srcs: [clang_libfuzzer_dir + "arm/libFuzzer.a"],
+        },
+        android_arm64: {
+            srcs: [clang_libfuzzer_dir + "aarch64/libFuzzer.a"],
+        },
+        android_mips: {
+            srcs: [clang_libfuzzer_dir + "mips/libFuzzer.a"],
+        },
+        android_mips64: {
+            srcs: [clang_libfuzzer_dir + "mips64/libFuzzer.a"],
+        },
+        android_x86: {
+            srcs: [clang_libfuzzer_dir + "i386/libFuzzer.a"],
+        },
+        android_x86_64: {
+            srcs: [clang_libfuzzer_dir + "x86_64/libFuzzer.a"],
+        },
+    },
+    sanitize: {
+        never: true,
+    },
+}