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/* SCO has a bug where `waitpid' will never return if SIGCHLD is blocked.
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They have acknowledged that this is a bug but I have not seen nor heard
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of any forthcoming fix. */
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#define WAITPID_CANNOT_BLOCK_SIGCHLD
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/* SCO 3.2v4 does have `waitpid'.
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Avoid unix/system.c, which says we don't. */
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#include <sysdeps/posix/system.c>