Emulator

Isn't there a cmake variable like ${GTK2_LIBRARIES} instead of hardcoding the library names?

I haven't looked to be honest. cmake is like black magic to me. This patch should just indicate where the problem lies, not be applied as-is.

I just checked, ${GTK2_LIBRARIES} works too.

It seems to work here.

Issue 5543 has been merged into this issue.

This is not really related to wx.
Dolphin's code, in X11Utils.cpp, directly uses GTK functions (through the GTK_WIDGET macro). So Dolphin must link against GTK, the same than any other library.

It's related to wx only in the fact that the related code in X11Utils.cpp is inside a "#if defined(HAVE_WX) && HAVE_WX".

It works when using the internal wx because the wx CMakeLists.txt file is adding the "set(LIBS ${GTK2_LIBRARIES})" line. But that just means you got lucky and something else did your work. The code that uses it is the one responsible of adding the needed linker flags.