/usr/local/include/ptlib/unix/ptlib/pdirect.h:78: error: parse error before `
   protected'
/usr/local/include/ptlib/unix/ptlib/pdirect.h:80: error: syntax error before `*
   ' token
In file included from /usr/local/include/ptlib.h:193,
                 from h323chan.cpp:31:
/usr/local/include/ptlib/unix/ptlib/config.h:53: error: parse error before `
   public'
/usr/local/include/ptlib/unix/ptlib/config.h:55: error: destructors must be
   member functions
/usr/local/include/ptlib/unix/ptlib/config.h:57: error: parse error before `
   protected'
In file included from /usr/local/include/ptlib.h:199,
                 from h323chan.cpp:31:
/usr/local/include/ptlib/args.h:133: error: parse error before `{' token