Patch to avoid using mkfifo under Cygwin

[Mo DeJong <supermo@bayarea.net>]

Here is a patch that avoids calling mkfifo under Cygwin since
it is not functional.

Mo

2002-09-12  Mo DeJong  <supermo@bayarea.net>

	* unix/tclUnixFCmd.c (DoCopyFile): Don't use mkfifo
	when compiling with Cygwin, since it is not supported.

Index: unix/tclUnixFCmd.c
===================================================================
RCS file: /cvs/src/src/tcl/unix/tclUnixFCmd.c,v
retrieving revision 1.2
diff -u -r1.2 tclUnixFCmd.c
--- unix/tclUnixFCmd.c	9 Sep 2001 23:56:09 -0000	1.2
+++ unix/tclUnixFCmd.c	12 Sep 2002 22:37:10 -0000
@@ -391,12 +391,18 @@
 	    }
 	    return CopyFileAtts(src, dst, &srcStatBuf);
 	}
+#ifndef __CYGWIN__
+        /*
+         * mkfifo is not supported under Cygwin even though it is prototyped
+         * in newlib headers.
+         */
         case S_IFIFO: {
 	    if (mkfifo(dst, srcStatBuf.st_mode) < 0) {	/* INTL: Native. */
 		return TCL_ERROR;
 	    }
 	    return CopyFileAtts(src, dst, &srcStatBuf);
 	}
+#endif /* __CYGWIN__ */
         default: {
 	    return CopyFile(src, dst, &srcStatBuf);
 	}