Add support for -nomake-tests and -nomake-examples equivalents

A developer can pass either -DQT_NO_MAKE_TESTS=ON or
-DQT_NO_MAKE_EXAMPLES=ON to exclude tests or examples from being built
as part the default make target (when you write just make or ninja).

With ninja, tests and examples can be built separately one by one,
by typing
 $ ninja tst_foo
or
 $ ninja example_bar

Same can be done with the Makefile generator.
 $ make tst_foo

All tests / examples can be built in one go by typing
 $ ninja tests/all
or
 $ ninja examples/all

With the Makefile generator unfortunately it's not as nice and is most
likely an implementation detail, but it can still be done by running
something like
 $ make -f CMakeFiles/Makefile2 tests/all
or
 $ make -f CMakeFiles/Makefile2 examples/all

Change-Id: I34f168b3ab41e952a21d3ace5634e25a9f41922e
Reviewed-by: Qt CMake Build Bot
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 6 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bb3cedc953..2b92df6853 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -62,6 +62,9 @@ endif()
 
 if(BUILD_TESTING)
     add_subdirectory(tests)
+    if(QT_NO_MAKE_TESTS)
+        set_property(DIRECTORY tests PROPERTY EXCLUDE_FROM_ALL TRUE)
+    endif()
 endif()
 
 if(NOT QT_BUILD_STANDALONE_TESTS)
@@ -81,4 +84,7 @@ qt_build_repo_end()
 
 if(NOT QT_BUILD_STANDALONE_TESTS AND BUILD_EXAMPLES)
     add_subdirectory(examples)
+    if(QT_NO_MAKE_EXAMPLES)
+        set_property(DIRECTORY examples PROPERTY EXCLUDE_FROM_ALL TRUE)
+    endif()
 endif()