TDMGCC 4.9.2 is also working well with wxWidgets 3.0.2. The only detail I had to change was adding -std=c++11 to CXXFLAGS. Other than that, compilation of wxWidgets was free of problems.
To build wxWidget apps, it's also necessary to add -std=c++11.
Eduardo
I had to use CXXFLAGS="-std=gnu++11" rather than "-std=c++11" to get wxwidgets 3.0.2 (debug) to successfully build with the 4.9 version. With 4.8.1, I never had to use any CXXFLAGS at all to build wx 3.0.2. Is 4.9 just more finicky than 4.8?
At least I learned how to add flags to the compiler options checkbox list at last, and modify existing ones, to add gnu++11 to the c++XX options already there, and keep them from stepping on each other's toes, so to speak, with the "superceded" lists.
Edit: Who knew all that was hiding behind the right-click button?