[R-SIG-Finance] recommended C++ compiler for R package ?

[mel]

Great thanks to all for the valuable answers.

On the R side, as told by D. Eddelbuettel it appears that
gcc/g++ are indeed the supported compilers to create R packages.
Others are usable ... at user's own risks.

VC++6 (Excerpts from docs) :
- ... lacks some standard functions such as isnan and isfinite ... we
have seen examples of IEC60559 arithmetic being performed incorrectly.
- ... has changed the floating point control word (in its initialization
code) to a setting incompatible with that needed for R.

This is a point to take in consideration.
I would prefer to be able to be confident in the code results.

On the interactive brokers IB side, VC++6 seems used by numerous people,
but i didn't find that VC++6 is "officially" supported or prefered.

I'll go deeper on those issues.

Thank you very much to all
Vincent