Warn users of TestCPP11 if it runs multiple times (for each subproject).

Eyescale · Aug 6, 2015 · 0a6e17b · 0a6e17b
1 parent 1360176
commit 0a6e17b
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/TestCPP11.cmake b/TestCPP11.cmake
@@ -7,6 +7,11 @@ if(TESTS_CPP11_DONE)
 endif()
 set(TESTS_CPP11_DONE ON)
 
+if(NOT PROJECT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
+  message(WARNING "For better performance, include TestCPP11 in the top-level "
+    "project so that it is run only once.")
+endif()
+
 set(TESTS_CPP11 sharedptr tuple auto nullptr array final_override unordered_map
   template_alias)