Workaround for the change in libnddscore.so in connext 5.2.0 between …

…gcc4.6.3 and gcc4.8.2 (#55)

* Workaround for the change in libnddscore.so in connext 5.2.0 between gcc4.6.3 and gcc4.8.2

* Prefix macro variables with underscore

rcl/test/CMakeLists.txt

@@ -129,6 +129,13 @@ function(test_target_function)
     AMENT_DEPENDENCIES ${rmw_implementation} "example_interfaces"
   )
 
+  # TODO remove this once connext declares libdl dependency in libnddscore again
+  # See https://github.com/ros2/rcl/issues/52
+  if("${rmw_implementation} " STREQUAL "rmw_connext_cpp ")
+    connext_workaround(client_fixture${target_suffix})
+    connext_workaround(service_fixture${target_suffix})
+  endif()
+
   rcl_add_custom_launch_test(test_services
     service_fixture
     client_fixture
@@ -139,4 +146,15 @@ function(test_target_function)
   )
 endfunction()
 
+macro(connext_workaround target)
+  if("${CMAKE_CXX_COMPILER_ID} " STREQUAL "GNU ")
+    get_target_property(_current_link_flags ${target} LINK_FLAGS)
+    set(_link_flags "-Wl,--no-as-needed")
+    if(_current_link_flags)
+      set(_link_flags ${_current_link_flags} ${_link_flags})
+    endif()
+    set_target_properties(${target} PROPERTIES LINK_FLAGS "${_link_flags}")
+  endif()
+endmacro()
+
 call_for_each_rmw_implementation(test_target)