Log Message:
Import libcerf-1.4 as devel/libcerf.

This is libcerf, a self-contained numeric library that provides an
efficient and accurate implementation of complex error functions,
along with Dawson, Faddeeva, and Voigt functions.

On current GNU/Linux systems, the man page complex(7) has a "see
also" section that lists complex mathematical functions like cabs(3),
cacos(3), and so on. Among them, there is a complex error function.
However, its manual page cerf(3) describes the functions cerf and
cerfc as "unimplemented" and "reserved for future use". The \ 
present
library libcerf provides the missing implementation, along with a
related functions. It comes with a set of man pages, including a
page cerf(3) that overwrites the standard one.