Seeing that rubenvb's MinGW-w64 build uses gcc 4.7 and RTools use gcc 4.6,
I have tried again to get rid of all MinGWs and only use RTools (suspecting
maybe binary incompatibility). Instead of mingw32-make.exe I am trying to
use the make.exe supplied by RTools.

Boost compiles just fine, luckily. With CodeLite and my library, the only
issue is that for some reason, it recompiles every file every time. Other
than that, I successfully end up with a .dll. Using make.exe and my library
with a premake4 generated make file, make.exe fails to create the obj
directory, but if I do that manually, manages to compile the individual
object files. It does, however, refuse to link afterwards, but that is also
fixable by adding a manual -m64 to the linker.

In any case, with both CodeLite and make.exe straight I end up with a dll
that I again can load with dyn.load - alas, unfortunately, neither exposes
any functions in R. I even switched one of the RcppExport's to a extern
"C", to no avail.

Which means that I am now on the RTools toolchain, and still don't get my
functions exported...

Any advice appreciated...

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