Make the unistd.h include conditional.
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c995331d27
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@ -31,7 +31,9 @@
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#include <string.h>
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#include <string.h>
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#include <ctype.h>
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#include <ctype.h>
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#include <stddef.h>
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#include <stddef.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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# include <unistd.h>
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#endif
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#include <signal.h>
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#include <signal.h>
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#ifdef HAVE_CUPS_CUPS_H
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#ifdef HAVE_CUPS_CUPS_H
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# include <cups/cups.h>
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# include <cups/cups.h>
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