[Patch, fortran] PR20541 - allocatable components (TR15541)

[Paolo Bonzini]

> How portable is alloca?  It's, as far as I know, not standard (neither
> ANSI C nor POSIX).  It's possible that it, in practice, is supported
> everywhere where gfortran is supposed to work, but, to quote the
> man-page of the GNU implementation of alloca:

There are also VLA's that are the "standardized version" of alloca.

Paolo