[Bf-committers] Change of MinGW64 compiler

[Antony Riakiotakis]

>
> About the issue with the crash,
>

This is the previous crash on render, not the one related to pthreads. The
new dll libraries are needed because of the new compiler build (code
compiled with it willl expect these dlls). It may be possible to ommit some
of these if all libraries are recompiled with
static-libgcc/static-libstcc++ but pthread will always be necessary I'm
afraid, and specific to the mingw64 build we are using :/. Same with
libgomp.dll (openmp related).