<ul>
<li>
AIX
- (3.2.5, IBM XL C Compiler)
+ (3.2.5 [IBM XL C Compiler])
</li>
<li>
A/UX
- (3.x, original Apple C Compiler oder GNU C)
+ (3.x [Apple C Compiler, GNU C])
</li>
<li>
<a href="http://www.freebsd.org/">FreeBSD</a>
- (4.5/i386, GNU C)
+ (4.5 and newer on i386, x86_64 [GNU C])
</li>
<li>
<a href="http://www.hp.com/">HP-UX</a>
- (10.20, GNU C)
- </li>
- <li>
- <a href="http://www.hp.com/">HP-UX</a>
- (9.10/m68k, HP-UX cc)
+ (9.10, 10.20, 11.11 on hppa, m68k [HP-UX cc, GNU C])
</li>
<li>
IRIX
- (6.5, SGI MIPSpro C 7.30)
+ (6.5 [SGI MIPSpro C 7.30])
</li>
<li>
<a href="http://www.linux.org/">Linux</a>
- (2.2.x/i386, 2.4.x/i386 und 2.4.x/hppa, GNU C)
+ (2.x.y, 3.x on hppa, i386, mipsel, powerpc, x86_64, ... [GNU C])
</li>
<li>
- <a href="http://www.apple.com/macosx/">Mac OS X</a>
- (10.x, GNU C 2.95.x/3.x/4.01)
+ <a href="http://www.apple.com/macosx/">Mac OS X</a> (Darwin)
+ (10.0 and newer on i386, powerpc, x86_64 [GNU C 2.95.x, 3.x, 4.x])
</li>
<li>
<a href="http://www.netbsd.org/">NetBSD</a>
- (1.5.2/i386 und 1.5.3/m68k, GNU C)
+ (1.5.2 and newer on alpha, i386, m68k, sparc, x86_64, ... [GNU C])
</li>
<li>
- <a href="http://www.obenbsd.org/">OpenBSD</a>
- (3.4/i386)
+ <a href="http://www.openbsd.org/">OpenBSD</a>
+ (3.4 and newer on hppa, i386, powerpc, x86_64 [GNU C])
</li>
<li>
<a href="http://www.sun.com/">Solaris</a>
- (2.5.1 und 2.6, GNU C)
+ (2.5.1 and newer on i386, sparc [GNU C])
</li>
<li>
Windows mit <a href="http://sources.redhat.com/cygwin/">Cygwin</a>