install.texi (specific): Expand Windows build notes.

2008-06-30  Aaron W. LaFramboise  <aaronavay62@aaronwl.com>

	* doc/install.texi (specific): Expand Windows build notes.

From-SVN: r137273

gcc/ChangeLog

+2008-06-30  Aaron W. LaFramboise  <aaronavay62@aaronwl.com>
+
+	* doc/install.texi (specific): Expand Windows build notes.
+
 2008-06-30  Ira Rosen  <irar@il.ibm.com>
 
 	PR tree-optimization/36648

gcc/doc/install.texi

@@ -2591,6 +2591,12 @@ information are.
 @item
 @uref{#windows,,Microsoft Windows}
 @item
+@uref{#x-x-cygwin,,*-*-cygwin}
+@item
+@uref{#x-x-interix,,*-*-interix}
+@item
+@uref{#x-x-mingw,,*-*-mingw}
+@item
 @uref{#os2,,OS/2}
 @item
 @uref{#older,,Older systems}
@@ -4020,7 +4026,64 @@ respects, this target is the same as the
 @html
 <hr />
 @end html
-@heading @anchor{windows}Microsoft Windows (32-bit)
+@heading @anchor{windows}Microsoft Windows
+
+@subheading Intel 16-bit versions
+The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not 
+supported.
+
+However, the 32-bit port has limited support for Microsoft 
+Windows 3.11 in the Win32s environment, as a target only.  See below.
+
+@subheading Intel 32-bit versions
+
+The 32-bit versions of Windows, including Windows 95, Windows NT, Windows 
+XP, and Windows Vista, are supported by several different target 
+platforms.  These targets differ in which Windows subsystem they target 
+and which C libraries are used.
+
+@itemize
+@item Cygwin @uref{#x-x-cygwin,,*-*-cygwin}: Cygwin provides a user-space 
+Linux API emulation layer in the Win32 subsystem.
+@item Interix @uref{#x-x-interix,,*-*-interix}: The Interix subsystem 
+provides native support for POSIX.
+@item MinGW @uref{#x-x-mingw,,*-*-mingw}: MinGW is a native GCC port for 
+the Win32 subsystem that provides a subset of POSIX.
+@item MKS i386-pc-mks: NuTCracker from MKS.  See 
+@uref{http://www.mkssoftware.com/} for more information.
+@end itemize
+
+@subheading Intel 64-bit versions
+
+GCC contains support for x86-64 using the mingw-w64
+runtime library, available from @uref{http://mingw-w64.sourceforge.net/}.
+This library should be used with the target triple x86_64-pc-mingw32.
+
+Presently Windows for Itanium is not supported.
+
+@subheading Windows CE
+
+Windows CE is supported as a target only on ARM (arm-wince-pe), Hitachi 
+SuperH (sh-wince-pe), and MIPS (mips-wince-pe).
+
+@subheading Other Windows Platforms
+
+GCC no longer supports Windows NT on the Alpha or PowerPC.
+
+GCC no longer supports the Windows POSIX subsystem.  However, it does 
+support the Interix subsystem.  See above.
+
+Old target names including *-*-winnt and *-*-windowsnt are no longer used.
+
+PW32 (i386-pc-pw32) support was never completed, and the project seems to 
+be inactive.  See @uref{http://pw32.sourceforge.net/} for more information.
+
+UWIN support has been removed due to a lack of maintenance.
+
+@html
+<hr />
+@end html
+@heading @anchor{x-x-cygwin}*-*-cygwin
 
 Ports of GCC are included with the
 @uref{http://www.cygwin.com/,,Cygwin environment}.
@@ -4028,7 +4091,26 @@ Ports of GCC are included with the
 GCC will build under Cygwin without modification; it does not build
 with Microsoft's C++ compiler and there are no plans to make it do so.
 
-For MinGW, GCC will build with and support only MinGW runtime 3.12 and later.
+Cygwin can be compiled with i?86-pc-cygwin.
+
+@html
+<hr />
+@end html
+@heading @anchor{x-x-interix}*-*-interix
+
+The Interix target is used by OpenNT, Interix, Services For UNIX (SFU), 
+and Subsystem for UNIX-based Applications (SUA).  Applications compiled 
+with this target run in the Interix subsystem, which is separate from 
+the Win32 subsystem.  This target was last known to work in GCC 3.3.
+
+For more information, see @uref{http://www.interix.com/}.
+
+@html
+<hr />
+@end html
+@heading @anchor{x-x-mingw32}*-*-mingw32
+
+GCC will build with and support only MinGW runtime 3.12 and later.
 Earlier versions of headers are incompatible with the new default semantics
 of @code{extern inline} in @code{-std=c99} and @code{-std=gnu99} modes.