Emit module interface

Author: grynspan

Sources/_TestDiscovery/CMakeLists.txt

@@ -17,6 +17,10 @@ target_link_libraries(_TestDiscovery PRIVATE
 
 _swift_testing_install_target(_TestDiscovery)
 
+target_compile_options(_TestDiscovery PRIVATE
+  -enable-library-evolution
+  -emit-module-interface -emit-module-interface-path $<TARGET_PROPERTY:_TestDiscovery,Swift_MODULE_DIRECTORY>/_TestDiscovery.swiftinterface)
+
 if(NOT BUILD_SHARED_LIBS)
   # When building a static library, install the internal library archive
   # alongside the main library. In shared library builds, the internal library