Reduce the number of exported symbols from the native lookup library

project-oak · Feb 13, 2024 · d589d7e · d589d7e
1 parent 50cfd97
commit d589d7e
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Showing 3 changed files with 10 additions and 1 deletion.
diff --git a/cc/native_sdk/BUILD b/cc/native_sdk/BUILD
@@ -36,8 +36,10 @@ cc_library(
 cc_binary(
     name = "key_value_lookup",
     srcs = ["key_value_lookup.cc"],
+    linkopts = ["-Wl,--version-script,$(location symbols.map.ld)"],
     linkshared = True,
     deps = [
+        "symbols.map.ld",
         ":native_sdk",
         "@com_google_absl//absl/log:check",
     ],

diff --git a/cc/native_sdk/native_sdk.h b/cc/native_sdk/native_sdk.h
@@ -26,7 +26,7 @@
 // We call oak_main without arguments, and oak_main then calls read_request,
 // processes the request, and then calls write_response.  This makes the API
 // compatible with Oak Functions.
-#define OAK_MAIN void oak_main()
+#define OAK_MAIN extern "C" void oak_main()
 
 namespace oak::functions::sdk {
 

diff --git a/cc/native_sdk/symbols.map.ld b/cc/native_sdk/symbols.map.ld
@@ -0,0 +1,7 @@
+{
+    global:
+        register_callbacks;
+        oak_main;
+    local:
+        *;
+};