Make OSS libhermes ABI compatible with RN

Summary:
We removed a method that RN currently uses, which means that Hermes 0.2.x can not be used with RN <=0.60.5. See #109

This diff adds a dummy passthrough method for linking compatibility.

Reviewed By: mhorowitz

Differential Revision: D17351288

fbshipit-source-id: 7d98af7065064dd47f66dba9ca82ac1192dff133

API/hermes/CMakeLists.txt

@@ -6,6 +6,7 @@
 set(LLVM_OPTIONAL_SOURCES
   hermes.cpp
   hermes_tracing.cpp
+  hermes_tracing_compat.cpp
   DebuggerAPI.cpp
   SynthTrace.cpp
   SynthTraceParser.cpp
@@ -17,6 +18,7 @@ set(LLVM_OPTIONAL_SOURCES
 set(api_sources
   hermes.cpp
   DebuggerAPI.cpp
+  hermes_tracing_compat.cpp
   )
 
 add_llvm_library(hermesapi

API/hermes/hermes_tracing_compat.cpp

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the LICENSE
+ * file in the root directory of this source tree.
+ */
+#include "hermes_tracing.h"
+#include "llvm/Support/ErrorHandling.h"
+
+namespace facebook {
+namespace hermes {
+
+// This function is here for ABI linking compatibility.
+std::unique_ptr<jsi::Runtime> makeTracingHermesRuntime(
+    std::unique_ptr<HermesRuntime> hermesRuntime,
+    const ::hermes::vm::RuntimeConfig &runtimeConfig) {
+  if (!runtimeConfig.getTraceEnvironmentInteractions()) {
+    return hermesRuntime;
+  }
+  llvm_unreachable("Invoked compat makeTracingHermesRuntime!");
+}
+
+} // namespace hermes
+} // namespace facebook