Index: openmp/libomptarget/plugins-nextgen/common/PluginInterface/CMakeLists.txt
===================================================================
--- openmp/libomptarget/plugins-nextgen/common/PluginInterface/CMakeLists.txt
+++ openmp/libomptarget/plugins-nextgen/common/PluginInterface/CMakeLists.txt
@@ -20,6 +20,7 @@
 add_definitions(-DDEBUG_PREFIX="PluginInterface")
 
 set_property(TARGET PluginInterface PROPERTY POSITION_INDEPENDENT_CODE ON)
+set_property(TARGET PluginInterface PROPERTY CXX_VISIBILITY_PRESET protected)
 llvm_update_compile_flags(PluginInterface)
 set(LINK_LLVM_LIBS LLVMSupport)
 if (LLVM_LINK_LLVM_DYLIB)