fix compilation errors

Gabriele Contini

2020-03-15 a1b64080d1525a7a65e53f33d1a3fd257957e732

 test/library/CMakeLists.txt

@@ -55,6 +55,10 @@
 Boost::system
)

if(CODE_COVERAGE AND UNIX)
  target_link_libraries(test_event_registry gcov)
endif(CODE_COVERAGE AND UNIX)

ADD_TEST(NAME test_license_reader COMMAND test_license_reader)
ADD_TEST(NAME test_license_locator COMMAND test_license_locator)
ADD_TEST(NAME test_event_registry COMMAND test_event_registry)