This feature is ill-designed and no longer needed by the GUI. And is not very
useful: it is not possible to interact with the preprocessor without using the
filesystem, since the preprocessor creates many files anyways.
If we really need to reimplement such a feature, it should rather be redesigned
by reading the modfile from standard input (cin). That could be triggered by
using "-" as the filename argument (as is already done by several standard Unix
utilities).
New options "mexext" and "matlabroot" are introduced, so that the preprocessor
knows where to find MATLAB and which architecture to compile for.
Only recent gcc is now supported. A set of optimization flags is used so that
compilation goes reasonably fast on large models.
Consequently, options "msvc", "mingw" and "cygwin" have been removed.
Houtan Bastani
Sébastien Villemot