We only use the unittests-shared example and this unused one has ODR
violations. Skip building it for now rather than filter-lto w/ tests
to avoid triggering -Werror=odr -flto CI (ideally would want to only
build unittests and not have to worry about build time + quirks of
all examples).
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -100 +99,0 @@
-fl_create_example(coordinates coordinates.cxx fltk::fltk)