Date: Tue, 23 Feb 2016 23:50:57 +1100 From: andrew clarke <mail@ozzmosis.com> To: Koichiro IWAO <meta@vmeta.jp> Cc: freebsd-questions@freebsd.org Subject: Re: how to know if bug 198092 applied in C program? Message-ID: <20160223125057.GA41865@ozzmosis.com> In-Reply-To: <000001530cf44e47-ccacfe21-94cc-4fb0-898b-c726a3c608e1-000000@us-west-2.amazonses.com> References: <000001530cf44e47-ccacfe21-94cc-4fb0-898b-c726a3c608e1-000000@us-west-2.amazonses.com>
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On Tue 2016-02-23 07:07:30 UTC+0000, Koichiro IWAO (meta@vmeta.jp) wrote: > Hello, > > I'm writing a C program and having a question. > > My program is intended to run under stable/9, releng/9.3, stable/10, > releng/10.2, releng/10.3 and sometimes current. Stables are not always > up to date. > > I'd like to check if getaddrinfo(3) supports AI_V4MAPPED using something > like "#ifdef" or "#if" macros because it is not necessarily > implemented[1]. > Probably I can use __FreeBSD_version for that. Is this way good? I think you could use a configure script (not necessarily Autoconf) instead, and test for AI_V4MAPPED support at build time. https://en.wikipedia.org/wiki/Configure_script
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