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Re: [gpsd-dev] RPATH

From: Eric S. Raymond
Subject: Re: [gpsd-dev] RPATH
Date: Wed, 20 Aug 2014 22:00:29 -0400
User-agent: Mutt/1.5.21 (2010-09-15)

Greg Troxel <address@hidden>:
> "Eric S. Raymond" <address@hidden> writes:
> > So I have simplified the RPATH handling as much as possible.  Here
> > is what the build currently does:
> >
> > 1. If libdir (defaulting to /ust/local/lib) is not in {/lib,
> >    /usr/lib}, it is prepended to RPATH in the scons build environment.
> >    The attempt to probe the system path with ldconfig is gone (I heard
> >    the argument that that it screwed up cross-compilation).
> >
> > 2. In the SConstruct build environment, the build directory is
> >    prepended to RPATH only if chrpath=yes, which is *no longer the
> >    default*.  In this case chrpath edits the build directory out of
> >    RPATH in binaries before installing them in rootspace.
> >
> > 3. In the regress-driver script RPATH is always set to include the
> >    current directory. This means regressions can always be run regardless
> >    of the value of libdir or whether chrpath is on or off, but without
> >    affecting the load path compiled into binaries.
> >
> > If anyone has a problem with these rules, explain.  Keep it simple.  Don't
> > make my head hurt.  And please change the mail subject to "RPATH".
> >
> > I'm going to delete that thread from my mailbox now.  We start fresh.
> That sounds like a good plan to me; I have no suggestions for changes
> for environments for which I try to use or maintain gpsd packages. (I am
> assuming that RPATH in scons leads to rpath args at link time.)

That is correct.
> The only thing I think some others might want is a configure switch to
> omit setting RPATH in scons build env, always.  But I don't know if that
> is wanted by any actual people, and if so it's easy for them to send a
> patch to add the switch.  And if the default is what you said, then I
> can't see anyone else getting bothered by the new switch.

Please bring it up, if you still think it's worthwhile, after 3.11.
It certainly doesn't need to go in sooner.
                <a href="";>Eric S. Raymond</a>

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