Merge topic 'minor-cleanups'

d1035bd5 cmTarget: Avoid copying container we don't need to copy.
96eb97f8 Help: Fix whitespace in doc link.
0dffbb93 Features: Ensure that list exists to remove from.

Help/command/add_compile_options.rst

@@ -14,7 +14,7 @@ alternative commands exist to add preprocessor definitions
 include directories (:command:`target_include_directories` and
 :command:`include_directories`).  See documentation of the
 :prop_tgt:`directory <COMPILE_OPTIONS>` and
-:prop_tgt:` target <COMPILE_OPTIONS>` ``COMPILE_OPTIONS`` properties.
+:prop_tgt:`target <COMPILE_OPTIONS>` ``COMPILE_OPTIONS`` properties.
 
 Arguments to ``add_compile_options`` may use "generator expressions" with
 the syntax ``$<...>``.  See the :manual:`cmake-generator-expressions(7)`

Modules/CMakeDetermineCompileFeatures.cmake

@@ -67,7 +67,7 @@ function(cmake_determine_compile_features lang)
       return()
     endif()
 
-    if (CMAKE_CXX98_COMPILE_FEATURES)
+    if (CMAKE_CXX11_COMPILE_FEATURES AND CMAKE_CXX98_COMPILE_FEATURES)
       list(REMOVE_ITEM CMAKE_CXX11_COMPILE_FEATURES ${CMAKE_CXX98_COMPILE_FEATURES})
     endif()
 

Source/cmTarget.cxx

@@ -1220,7 +1220,7 @@ void cmTarget::GetDirectLinkLibraries(const std::string& config,
                                         &dagChecker),
                                       libs);
 
-    std::set<std::string> seenProps = cge->GetSeenTargetProperties();
+    std::set<std::string> const& seenProps = cge->GetSeenTargetProperties();
     for (std::set<std::string>::const_iterator it = seenProps.begin();
         it != seenProps.end(); ++it)
       {