Date: Mon, 12 Jan 2009 21:51:31 +0700 From: Eugene Grosbein <eugen@kuzbass.ru> To: Andrew Brampton <brampton@gmail.com>, hackers@freebsd.org Subject: Re: Determine if a kernel is built with a specific option? Message-ID: <20090112145131.GA4375@svzserv.kemerovo.su> In-Reply-To: <a31046fc0901120500q5ab31adax903d32279894e23e@mail.gmail.com> References: <d41814900901120355h780a3232u14fa1e5da8f280ad@mail.gmail.com> <a31046fc0901120500q5ab31adax903d32279894e23e@mail.gmail.com>
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> I was wondering how a autoconf configure script can determine if the > kernel is built with a particular option. In this case the code I have > can make use of the FreeBSD polling driver, which by default isn't > built into a kernel. So I want my configure script to determine if the > kernel supports it, if so sets a #define, otherwise doesn't. You should not assume that compiled code does not need polling support just because _buildbox_ doesn't have it enabled in time of build. If the code builds here, it does not mean it will run here. Eugene Grosbein
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