	4x *the mini multi-tasking HTTP/1.1 web-server*

Platforms

The 4x web-server is quite portable - it can be built and run on most POSIX-like systems. It was deliberately designed to run on:

4.4 BSD and derivatives, including NetBSD, FreeBSD, OpenBSD, et al
UNIX System V Release 4 and derivatives, including Solaris (SunOS 5), DYNIX/ptx 2, Irix 5, HP-UX 10, AIX 4, and so on.
Digital UNIX 3.2 and Tru64 UNIX
Linux distributions (kernel version 1.2 - 1995)
Minix 3
Cygwin 1.3 on Microsoft Windows
Microsoft Windows Services for UNIX 3.0
Windows NT 4.0 SP6a+, Windows 2000 and Windows XP Professional
Microsoft Windows Services for UNIX 3.5
Windows 2000, Windows XP Professional, Windows Server 2003
Windows Subsystem for UNIX-based Applications
Vista (Ultimate and Enterprise editions), Windows 7 (Ultimate and Enterprise editions), Windows Server 2008.

and subsequent versions of those operating softwares.

4x is written in 100% ANSI C (C89), and uses the following additional APIs:

IEEE Std 1003.1-1988 (POSIX.1-1988),
The "minimum common subset" of the 4.2 BSD "socket" and UNIX System V Release 4 "socket" facilities (plain old synchronous-I/O TCP sockets with no fancy options or methods).
For security reasons, 4x also requires the readlink() and lstat() functions and the related S_ISLNK symbol in <sys/stat.h>

Apart from the specific operating-systems mentioned elsewhere, 4x will run on any system that conforms to at least one of:

for which there is an available ANSI C compiler.

At the time of writing, 4x has been automatically built and extensively tested on: