# Compiling Apache under UnixWare

To compile a working copy of Apache under UnixWare, there are several other steps you may need to take. These prevent such problems as zombie processes, bind errors, and accept errors, to name a few.

## UnixWare 1.x

Make sure that USE_FCNTL_SERIALIZE_ACCEPT is defined (if not defined by Apache autoconfiguration). If using the UnixWare cc compiler, and you still see accept() errors, don't use compiler optimization, or get gcc.

## UnixWare 2.0.x

SCO patch tf2163 is required in order for Apache to work correctly on UnixWare 2.0.x. See http://www.sco.com for UnixWare patch information.

In addition, make sure that USE_FCNTL_SERIALIZE_ACCEPT is defined (if not defined by Apache autoconfiguration). To reduce instances of connections in FIN_WAIT_2 state, you may also want to define NO_LINGCLOSE (Apache 1.2 only).

## UnixWare 2.1.x

SCO patch ptf3123 is required in order for Apache to work correctly on UnixWare 2.1.x. See http://www.sco.com for UnixWare patch information.

NOTE: Unixware 2.1.2 and later already have patch ptf3123 included

In addition, make sure that USE_FCNTL_SERIALIZE_ACCEPT is defined (if not defined by Apache autoconfiguration). To reduce instances of connections in FIN_WAIT_2 state, you may also want to define NO_LINGCLOSE (Apache 1.2 only).

Thanks to Joe Doupnik <JRD@cc.usu.edu> and Rich Vaughn <rvaughn@aad.com> for additional info for UnixWare builds.