+-------------------+
| BUILDING A FILTER |
+-------------------+

The following command presumes that the sample code from the end of this
README is saved to a file named "sample.c".

    cc -m64 -D_REENTRANT -o sample sample.c -lmilter -lpthread

Filters must be thread-safe!  The compiler flag to link with threading support
differs according to the compiler and linker used.  Many operating systems like
Solaris now provide support for POSIX threads in the standard C libraries. For
those there is no need to link with additional libraries like libpthread etc.!

Note that since filters use threads, it may be necessary to alter per
process limits in your filter.  For example, you might look at using
setrlimit() to increase the number of open file descriptors if your filter
is going to be busy.