Fix GCC/CMake warnings for Noble (gazebosim#2375)

* Use latest 1.14 google-test in gtest_setup

Signed-off-by: Jose Luis Rivero <jrivero@osrfoundation.org>

* Make gcc happy about dangling pointer

GCC is emitting a warning about a possible danling pointer on table
like definitions:

warning: possibly dangling reference to a temporary [-Wdangling-reference]
  660 |         auto const& table = get_current_events_table(state_indexes{});
      |                     ^~~~~

Which I think that really comes from the use of state_indexes{} as
argument:

  note: the temporary was destroyed at the end of the full expression
  660 |         auto const& table = get_current_events_table(state_indexes{});
      |                             ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~

Clang is quiet about this and make me think that is a false positive
since the metaprogramming code is using just the type of the state_indexes
as much as I can see.

---------

Signed-off-by: Jose Luis Rivero <jrivero@osrfoundation.org>
Co-authored-by: Alejandro Hernández Cordero <ahcorde@gmail.com>

examples/plugin/custom_sensor_system/CMakeLists.txt

@@ -27,10 +27,11 @@ add_subdirectory(${sensors_clone_SOURCE_DIR}/examples/custom_sensor ${sensors_cl
 
 add_library(${PROJECT_NAME} SHARED ${PROJECT_NAME}.cc)
 target_link_libraries(${PROJECT_NAME}
-  PRIVATE gz-plugin${GZ_PLUGIN_VER}::gz-plugin${GZ_PLUGIN_VER}
-  PRIVATE gz-sim${GZ_SIM_VER}::gz-sim${GZ_SIM_VER}
-  PRIVATE gz-sensors${GZ_SENSORS_VER}::gz-sensors${GZ_SENSORS_VER}
-  PRIVATE odometer
+  PRIVATE
+    gz-plugin${GZ_PLUGIN_VER}::gz-plugin${GZ_PLUGIN_VER}
+    gz-sim${GZ_SIM_VER}::gz-sim${GZ_SIM_VER}
+    gz-sensors${GZ_SENSORS_VER}::gz-sensors${GZ_SENSORS_VER}
+    odometer
 )
 target_include_directories(${PROJECT_NAME}
     PUBLIC ${sensors_clone_SOURCE_DIR}/examples/custom_sensor)

examples/standalone/gtest_setup/CMakeLists.txt

@@ -10,7 +10,8 @@ set(GZ_SIM_VER ${gz-sim8_VERSION_MAJOR})
 include(FetchContent)
 FetchContent_Declare(
   googletest
-  URL https://github.com/google/googletest/archive/609281088cfefc76f9d0ce82e1ff6c30cc3591e5.zip
+  # Version 1.14. Use commit hash to prevent tag relocation
+  URL https://github.com/google/googletest/archive/f8d7d77c06936315286eb55f8de22cd23c188571.zip
 )
 set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
 FetchContent_MakeAvailable(googletest)

src/systems/elevator/vender/afsm/include/afsm/detail/transitions.hpp

@@ -525,7 +525,8 @@ class state_transition_table {
     void
     check_default_transition()
     {
-        auto const& ttable = transition_table<none>( state_indexes{} );
+        auto st = state_indexes{};
+        auto const& ttable = transition_table<none>(st);
         ttable[current_state()](*this, none{});
     }
 
@@ -544,15 +545,17 @@ class state_transition_table {
     void
     exit(Event&& event)
     {
-        auto const& table = exit_table<Event>( state_indexes{} );
+        auto st = state_indexes{};
+        auto const& table = exit_table<Event>(st);
         table[current_state()](states_, ::std::forward<Event>(event), *fsm_);
     }
 
     template < typename Event >
     actions::event_process_result
     process_transition_event(Event&& event)
     {
-        auto const& inv_table = transition_table<Event>( state_indexes{} );
+        auto st = state_indexes{};
+        auto const& inv_table = transition_table<Event>(st);
         return inv_table[current_state()](*this, ::std::forward<Event>(event));
     }
 
@@ -655,10 +658,11 @@ class state_transition_table {
     event_set
     current_handled_events() const
     {
-        auto const& table = get_current_events_table(state_indexes{});
+        auto st = state_indexes{};
+        auto const& table = get_current_events_table(st);
         auto res = table[current_state_](states_);
         auto const& available_transitions
-                            = get_available_transitions_table(state_indexes{});
+                            = get_available_transitions_table(st);
         auto const& trans = available_transitions[current_state_];
         res.insert( trans.begin(), trans.end());
         return res;
@@ -667,7 +671,8 @@ class state_transition_table {
     event_set
     current_deferrable_events() const
     {
-        auto const& table = get_current_deferred_events_table(state_indexes{});
+        auto st = state_indexes{};
+        auto const& table = get_current_deferred_events_table(st);
         return table[current_state_](states_);
     }