autoconf, sendmail, and pthreads

[Lars Hecking]

 Hi all,

 Before I start hacking, has anyone written a set of autoconf tests, or
 possibly a macro, to find all files required for sendmail filters that
 use libmilter? This stuff requires threading libraries (pthreads - POSIX?),
 so there may be some hidden nastiness wrt different implementations.

 Can anyone comment on ACX_PTHREAD?

 Thanks!