Add anonymous namespace

Author: Hugh Delaney

scripts/templates/libapi.cpp.mako

@@ -83,10 +83,12 @@ try {
 %endfor
 %endfor
 
+namespace {
 // This uselessFunc is needed to ensure that pthread is linked correctly against
 // ur_loader.so for gcc-9
 void uselessFunc() {
     std::thread UselessThread([]{});
 }
+}
 
 } // extern "C"

source/loader/ur_libapi.cpp

@@ -7743,10 +7743,12 @@ ur_result_t UR_APICALL urUsmP2PPeerAccessGetInfoExp(
     return exceptionToResult(std::current_exception());
 }
 
+namespace {
 // This uselessFunc is needed to ensure that pthread is linked correctly against
 // ur_loader.so for gcc-9
 void uselessFunc() {
     std::thread UselessThread([] {});
 }
+} // namespace
 
 } // extern "C"