+# includes
+$INCFLAGS = "-I#{dir} #{$INCFLAGS}"
+
+# make sure there are no undefined symbols
+$LDFLAGS += ' -Wl,--no-undefined'
+
+def have_local_library(lib, path, func, headers = nil)
+ checking_for checking_message(func, lib) do
+ lib = File.join(path, lib)
+ if try_func(func, lib, headers)
+ $LOCAL_LIBS += lib
+ end
+ end