Cygwin is a DLL which provides a Unix emulation environment for Windows. The Cygwin environment provides a complete port of such development utilities as gcc, binutils, gdb, make, etc., as well as a vast number of useful utilities.
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cygserver has been released: it implements Sys V shared memory, semaphores, message queues. Signal handling works better with pthreads. TTY access controls have been tightened. TIOCLINUX, mknod, and sigwait have been implemented.
