Hi Michael,
Thanks for taking the time to review this issue and excuse me for the lack of information. I was using latest tcc mob branch, compiled with mingw-w64 32bit compiler on a Windows 10 32bit (generating tcc 32bit) and later used on a Windows 10 Pro 64bit to compile raylib and the example. My tcc uses some mingw32 additional headers (GL, winapi).
I reverted raylib change and I tried compiling again (raylib and example). Now it works perfectly.
I was several hours dealing with this issue until I solved it with that patch, I don't know why it works now.
In any case, thanks you very much for your help and sorry for the inconvenience.
Kind Regards,
Ray