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Date: Tue, 4 Aug 2015 04:21:03 -0700
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH v3 08/11] xfsprogs: Add fls check into autoconf
Message-ID: <20150804112103.GF18906@infradead.org>
References: <1438612789-17486-1-git-send-email-jtulak@redhat.com>
	<1438612789-17486-9-git-send-email-jtulak@redhat.com>
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To: Jan Tulak <jtulak@redhat.com>
Cc: hch@infradead.org, xfs@oss.sgi.com

Can't you just use something like:

AC_CHECK_DECL([fls],
        [AC_DEFINE([HAVE_FLS_PROTOTYPE], [1],
	 [Define to 1 if have fls prototype])],
	 [],
	 [#include <string.h>])

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