[CMake] good way to append link flags?

[Clinton Stimpson]

I am using 
set_property(TARGET mytarget APPEND PROPERTY LINK_FLAGS "...")
multiple times to add various link flags.

But when I inspect the actual link command, I see all my flags separated by 
semi-colons and no spaces between them, which is not what I want.

Is this correct behavior for cmake?

Clint