Edit: Are you doing 32 bit or 64 bit windows builds? I can test either one.
I'm on an old 32 bit windows XP system.
I will be testing on Windows 7 (32 bit ?Ultra? or 64 bit Home Pro), likely start on 64 bit Home Pro first (Linux is Building something on the dual boot of the other one).
I will be doing it differently from you in the patch on Code::Blocks will NOT set WX_PRECOMP and no patch on wxWidgets if I can help doing that.
Edit:
gcc version 5.2.0 (Rev3, Built by MSYS2 project)
My GCC Compiler has this defined HAVE_TR1_TYPE_TRAITS
My GCC Compiler has this extra option -Wno-deprecated-declarations
My GCC Compiler has this additional path C:\Program Files\Git\cmd
(I am building from a Git repo; I had a weird Git error till I added this path)
wxWidgets 3.0.2 was built with
CPPFLAGS="-DHAVE_TR1_TYPE_TRAITS"
CXXFLAGS="-fno-keep-inline-dllexport"
Tim S.