Shared memory support

Shared memory support is needed by the MIT-SHM and XFree86-BigFont extensions, which may provide better performance for local applications which use large images or fonts and are written to use those extensions.

Shared memory is provided by the cygserver Windows service. To install cygserver, install it using setup.exe and then run the cygserver-config script to install the service.

Note: for Cygwin 1.5 only

XWin.exe will not use shared memory if the CYGWIN environment variable does not contain the server keyword. Starting XWin.exe with

CYGWIN=server XWin.exe
will enable shared memory support if the cygserver service is running.