Fix test target on macOS with Bazel@HEAD

[meteorcloudy]

supports_dynamic_linker feature was removed from cc toolchain for macOS,
cc_binary should be used to build shared library.

Context: bazelbuild/bazel#4341 (comment)

[jsharpe]

Thanks @meteorcloudy. This patch doesn't seem to work on windows though, could you take another look?

[meteorcloudy]

@jsharpe Fixed now! The shared library on Windows should end with ".dll" ;)

[jsharpe]

Thanks @meteorcloudy - yes strange that it was working with loading the interface lib instead of dll!

[UebelAndre]

My bad 😅

Do you know why a cc_binary produces that?

[meteorcloudy]

@UebelAndre Do you mean why does a cc_binary output a dll?

[UebelAndre]

@UebelAndre Do you mean why does a cc_binary output a dll?

Yeah

[meteorcloudy]

Oh, it's just the way to build a shared binary with Bazel, you can use a cc_binary rule with linkshared = True, then instead of building an executable binary, it builds a shared library (.so for Linux, .dll for Windows)
Check the linkshared attribute here: https://docs.bazel.build/versions/master/be/c-cpp.html#cc_binary

[UebelAndre]

Thanks! Good to know 😄