Date: Tue, 10 Apr 2012 14:04:05 -0400 From: "A.J. Kehoe IV (Nanoman)" <nanoman@nanoman.ca> To: Stephen Montgomery-Smith <stephen@missouri.edu> Cc: freebsd-ports@freebsd.org Subject: Re: autodetecting dependencies Message-ID: <20120410180405.GD19377@nanocomputer.nanoman.ca> In-Reply-To: <4F839499.8050103@missouri.edu> References: <4F839499.8050103@missouri.edu>
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--Hf61M2y+wYpnELGG Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Stephen Montgomery-Smith wrote: >So suppose we are building port A. It turns out that the configure in >port A autodetects whether package B is present or not. It will build >either way. But if built with package B, it will not operate without it. > >So suppose I build port A on machine X which has package B installed. >Then I create a package from A, and copy the package to machine Y. >Machine Y does not have package B installed, and so when package A is >installed, it doesn't work on machine Y. > >What are the accepted ways of handling this? > >1. Don't worry about it. tinderbox builds will never build port A in >the presence of package B. > >2. Have the Makefile of port A detect whether package B is installed, >and if it is then add B as a dependency of A. > >3. Cripple the configure in port A so that it doesn't autodetect for >package B. (Sometimes this can be done using a suitable CONFIGURE_ARGS, >but not in my particular situation.) > >I prefer the answer (1). But I am interested in other people's >opinions. One problem with (2) or (3) is that the creator of the port >might never find out which packages could be autodetected by port A's >configure without performing an exhaustive search of the source code of A. > >Thanks, Stephen In my opinion, it's best to use the OPTIONS framework and to avoid automati= c detection entirely. Consider this problem: http://docs.freebsd.org/cgi/mid.cgi?20120304190922.GA58789 For your example, I would add this line to port A's Makefile: OPTIONS=3D PORT_B "Enable Port B" off I would then replace the automatic detection part of port A's Makefile with= something like this: =2Eif defined(WITH_PORT_B) && !defined(WITHOUT_PORT_B) RUN_DEPENDS+=3D portb-1.0:${PORTSDIR}/category/portb =2Eendif So, if you don't want port A built with package B as a dependency, you'd us= e the default on port A's OPTIONS "dialog" screen, otherwise, you'd put a c= heck beside "PORT_B". --=20 A.J. Kehoe IV (Nanoman) | /"\ ASCII Ribbon Campaign Nanoman's Company | \ / - No HTML/RTF in E-mail E-mail: nanoman@nanoman.ca | X - No proprietary attachments WWW: http://www.nanoman.ca/ | / \ - Respect for open standards --Hf61M2y+wYpnELGG Content-Type: application/x-pkcs7-signature Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIIPCwYJKoZIhvcNAQcCoIIO/DCCDvgCAQExCzAJBgUrDgMCGgUAMAsGCSqGSIb3DQEHAaCC DHcwggUyMIIDGqADAgECAgMLj20wDQYJKoZIhvcNAQEFBQAweTEQMA4GA1UEChMHUm9vdCBD QTEeMBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0IFNp Z25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2VydC5vcmcwHhcN MTIwNDAzMTkwNjMwWhcNMTIwOTMwMTkwNjMwWjA9MRgwFgYDVQQDEw9DQWNlcnQgV29UIFVz ZXIxITAfBgkqhkiG9w0BCQEWEm5hbm9tYW5AbmFub21hbi5jYTCCASIwDQYJKoZIhvcNAQEB BQADggEPADCCAQoCggEBAK9WRGqRDUDjWwNIfZTBp4FL5bI0kY3ZqvM6tEO+Sqp5YxATre8F a+BYbeNp/8MKfuPrRgE2jRzlePAx7kpvZUhRTGAZpncmHC7Z3FDl8Ugid4193ReCfPypb9Gs 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