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From: cyg Simple <cygsimple AT gmail DOT com>
Subject: issetugid - not declared when _XOPEN_SOURCE is also defined
Message-ID: <d61199c7-85d2-039d-58cb-29fb8d6ff369@gmail.com>
Date: Wed, 9 Nov 2016 13:13:02 -0500
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The following program demonstrates the issue.  Should issetugid be
declared with this scenario?

/*****************************************************/
#define _XOPEN_SOURCE 1  /* Causes declare warning */
#define __BSD_VISIBLE 1
#include <unistd.h>

int main(int argc, char ** argv) {
	int result;
	result = issetugid();
}
/****************************************************/

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