strcmp(1): without <sysexits.h> fall back to ANSI C
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@ -1,6 +1,7 @@
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#include <stdio.h> /* fprintf(3), stderr */
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#ifndef EX_USAGE
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# include <sysexits.h> /* EX_USAGE */
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#include <stdlib.h> /* EXIT_FAILURE */
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#if !defined EX_USAGE
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# define EX_USAGE EXIT_FAILURE
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#endif
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static char *program_name = "strcmp";
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