[gn build] Set _LIBCPP_ABI_NAMESPACE to __$libcxx_abi_version

Matches CMake build. Otherwise currently everything is literally std::_LIBCPP_ABI_NAMESPACE::foo.
llvm · Oct 12, 2022 · eca6352 · eca6352
1 parent 2c09016
commit eca6352
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -47,7 +47,7 @@ if (current_toolchain == default_toolchain) {
     if (libcxx_abi_namespace != "") {
       values += [ "_LIBCPP_ABI_NAMESPACE=$libcxx_abi_namespace" ]
     } else {
-      values += [ "_LIBCPP_ABI_NAMESPACE=" ]
+      values += [ "_LIBCPP_ABI_NAMESPACE=__" + libcxx_abi_version ]
     }
   }