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Some architectures (ppc, alpha, sparc, parisc, sh and xtensa) define the BSD TIOCSTART and TIOCSTOP ioctls in their kernel headers to provide compatibility to other operating systems. Those ioctls are not implemented in Linux, nevertheless, bash will use this ioctl if it's available on those architectures. To avoid false warnings, add code to simply ignore those ioctls. Signed-off-by: Helge Deller <deller@gmx.de> Message-Id: <20161206152403.GA6651@ls3530> Signed-off-by: Richard Henderson <rth@twiddle.net>