Date: Wed, 3 Oct 2007 14:25:18 +0200 From: Mel <fbsd.questions@rachie.is-a-geek.net> To: freebsd-questions@freebsd.org Subject: Re: How to check applications vs. libraries Message-ID: <200710031425.20972.fbsd.questions@rachie.is-a-geek.net> In-Reply-To: <20071002215320.13360851@gumby.homeunix.com.> References: <200710021923.29750.daniel.tourde@spray.se> <20071002215320.13360851@gumby.homeunix.com.>
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On Tuesday 02 October 2007 22:53:20 RW wrote:
> On Tue, 2 Oct 2007 19:23:29 +0200
>
> Daniel Tourde <daniel.tourde@spray.se> wrote:
> > I am used to install FreeBSD applications by using the port
> > collection. I also update regularly (twice a month or something) the
> > apps, using 'portupgrade -a -N' on a refreshed port collection.
> >
> > Here are my questions:
> > - How can I check that the apps that have been build with certain
> > libraries still work when some of the libs have been updated?
> > - Is it possible then to rebuild the selected set of apps that have
> > been 'corrupted' by the library upgrade (classicaly from liba.1 to
> > liba.2)? If yes, how?
>
> Generally this doesn't cause a problem as when portupgrade upgrades a
> library through a major revision, it puts a copy of the old library
> into a compatibility directory.
True. /usr/local/lib/compat/pkg
> Applications that depend on updated libraries get version-bumped when
> the library major version gets changed
Not true. Only direct dependants get version bumped and not consistently
either. To recompile all dependants against the latest version of a library,
one has to find out which port the older version in /usr/local/lib/compat/pkg
belongs to and forcibly upgrade all deps of that package, using
`portupgrade -fr'.
I use the following little php script to identify programs/libraries still
using old libs:
#!/usr/local/bin/php -q
<?php
// vim: ts=4 sw=4 noet ai tw=78
$localbase = getenv('LOCALBASE');
if(!$localbase)
$localbase='/usr/local';
$cmd_fmt = '/usr/bin/ldd %s 2>/dev/null| grep compat/pkg';
$search_paths = array('bin', 'sbin', 'lib', 'libexec');
chdir($localbase);
foreach($search_paths AS $path)
{
echo("==> $path\n");
$files = glob("$path/*");
foreach($files AS $file)
{
$check = shell_exec(sprintf($cmd_fmt, $file));
if( empty($check) )
continue;
// pretty print reformat
$check = preg_replace('/^.*?=>/m', "\t\t=>", $check);
echo("\t$file depends on:\n$check");
}
}
?>
Given time, I could probably come up with something fully automated, but in
practice, it boils down to 2 or 3 libraries, usually of the sort gettext,
expat, vorbis, xml/xslt.
It's not full-proof, because some paths aren't searched, for
example /usr/local/openoffice, just adjust the search_paths array if you need
to.
--
Mel
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