1 files changed, 35 insertions, 0 deletions
diff --git a/tools/build/v2/test/unused.py b/tools/build/v2/test/unused.py
new file mode 100644
index 0000000000..9db2380cd1
--- /dev/null
+++ b/tools/build/v2/test/unused.py
@@ -0,0 +1,35 @@
+#!/usr/bin/python
+
+# Copyright 2003 Vladimir Prus 
+# Distributed under the Boost Software License, Version 1.0. 
+# (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) 
+
+# Test that unused sources are at least reported.
+
+import BoostBuild
+from string import find
+
+t = BoostBuild.Tester()
+
+t.set_tree("unused")
+
+t.run_build_system()
+# The second invocation should do nothing, and produce no warning. The previous
+# invocation might have printed executed actions and other things, so it is not
+# easy to check if warning was issued or not.
+t.run_build_system()
+t.fail_test(find(t.stdout(), "warning: Unused source { b.X } in main target ./a") == -1)
+
+t.run_build_system("-sGENERATE_ONLY_UNUSABLE=1")
+t.fail_test(find(t.stdout(), "warning: Unused source { b.X } in main target ./a") == -1)
+
+# Now check that even if main target generates nothing, its usage requirements
+# are still propagated to dependants.
+t.write("a.cpp", """
+#ifdef FOO
+int main() {}
+#endif
+""")
+t.run_build_system("-sGENERATE_NOTHING=1")
+
+t.cleanup()