Date: Thu, 13 Oct 2005 16:40:19 +0400 From: Sergey Skvortsov <skv@protey.ru> To: Edwin Groothuis <edwin@mavetju.org> Cc: ports@freebsd.org Subject: Re: PERL_RUN_DEPENDS and PERL_BUILD_DEPENDS Message-ID: <434E55B3.7020501@protey.ru> In-Reply-To: <20051012211228.GE1278@k7.mavetju> References: <20051012114222.GD1278@k7.mavetju> <434D0CFE.9090007@protey.ru> <20051012211228.GE1278@k7.mavetju>
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Edwin Groothuis wrote:
>>> The syntax is:
>>> PERL_BUILD_DEPENDS= MIME-Lite:${PORTSDIR}/mail/p5-MIME-Lite
>>> It checks the for the existence of MIME::Lite with the "perl -e
>>> 'use MIME::Lite'" command.
>> Obviously this approach will cause great performance degrade.
>> stat(2) is much more faster than loading perl.
>
> Minimal compared with the time it takes to fetch distfiles and to
> build. That's the only time it is checked.
Loading some module (via "use") can take even more time than simply
detecting corresponding .pm file because all code is compiled into
bytecode-tree. PERL_BUILD_DEPEND is an useless syntax sugar.
FYI: "perl -MMIME::Lite -e 0" is right way to check module.
--
Sergey Skvortsov
mailto: skv@protey.ru
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