Re: [PATCH] uuidd: use pkg-config to find systemd-deamon support

[Mike Frysinger <vapier@gentoo.org>]

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On Wednesday 08 January 2014 15:37:30 Sami Kerola wrote:
> On 8 January 2014 09:21, Karel Zak <kzak@redhat.com> wrote:
> > On Tue, Jan 07, 2014 at 01:44:07PM -0500, Mike Frysinger wrote:
> >> On Tuesday 07 January 2014 05:19:35 Karel Zak wrote:
> >> > On Tue, Jan 07, 2014 at 10:55:35AM +0100, Thomas Bächler wrote:
> >> > > >> We already have such a cyclic dependency, since udevd depends on
> >> > > >> libblkid+libuuid, and findmnt (from util-linux) depends on
> >> > > >> libudev.
> >> > > >> 
> >> > > >  .. and nobody complains, good point :-) Thanks!
> >> > > >  
> >> > > >     Karel
> >> > > 
> >> > > Actually, now that I know you care about these things, I am
> >> > > complaining.
> >> > > 
> >> >  :-)))
> >> >  :
> >> > > It has caused me (minor) trouble once already.
> >> >  
> >> >  It's possible (first time) to compile util-linux without libudev,
> >> >  compile systemd/udevd and then again recompile util-linux with
> >> >  libudev.
> >> >  
> >> >  IMHO libudev is very useful for findmnt and lsblk to get info about
> >> >  devices.
> >> >  
> >> >  Note that uuidd is absolutely unnecessary if you don't have huge SAP
> >> >  installation (-- it means unnecessary for 99% of the all Linux
> >> >  users).
> >> 
> >> on a semi-related matter, it'd be nice if we could easily build
> >> util-linux such that we only get the libraries.  the plethora of
> >> configure flags that control utils is a nightmare to manage, and i'm
> >> not sure there's a flag for every utility (i haven't checked myself, so
> >> i could easily be wrong).
> > 
> > not yet ;-)
> > 
> >> if that were in play, the circular loop would be easy to address --
> >> build util-linux once just for its libs, then udev/systemd, then
> >> util-linux again.
> > 
> > Yep, I know about the pain... I guess it would be enough to have
> > something like
> > 
> >  ./configure --disable-all-builds --enable-libblkid
> > 
> > where --enable/disable-all-builds controls the default of the
> > enable_<name>= variables (the current default is usually "check")
> > in configure.
> > 
> > I'll try to implement it later (I'm working on new cfdisk now) -- or
> > maybe some volunteer...? :-)
> 
> I could try to fiddle around with autotools in next days/weeks.
> 
> The one thing I am thinking to change immediately is
> 's/--disable-all-builds/--enable-minimal/'.  Unfortunately, due I'm just
> a random contributor without distribution packaging experience at all I
> will need few hints from real pros.  Most important question being what
> the minimal should include?  I did think that option could be
> --enable-libaries-only, but is that too minimal to be practical?

i don't think general flags like "minimal" are useful.  a knob that'd disable 
all binaries would though as then we could use the existing library knobs to 
select the exact ones we want to build/install.
-mike

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