Experimental Physics and Industrial Control System
On 06/20, J. Lewis Muir wrote:
> On 10/05, Andrew Johnson wrote:
> > Hi Lewis,
> >
> > On 10/05/2016 12:53 PM, J. Lewis Muir wrote:
> > > What would it take to get DESTDIR support added to the EPICS build
> > > system? I haven't looked, but I would think doing it for Linux and
> > > macOS would not be too hard, but I don't know about Windows or other
> > > platforms. And then there's cross-compiling, which is probably tricky,
> > > and for which I'd be interested in VxWorks.
> > >
> > > There was a thread about this two years ago at [1].
> >
> > > [1] http://www.aps.anl.gov/epics/tech-talk/2014/msg01500.php
> >
> > The main complication with doing something like this is that the act of
> > building Base involves running programs that were compiled earlier in
> > the same build. Those programs need to be able to find shared libraries
> > that have also only just been built, and the way we implemented that on
> > Unix-like systems was to use the linker's RPATH.
>
> Hi, Andrew!
>
> (Sorry to be revisiting this old thread.)
>
> Hmm, yes, that's an issue, then.
>
> What would you think about a restructured build that builds a bootstrap
> version first and then uses the bootstrap version to build a final
> version after that? In other words, the bootstrap version would be
> built and installed to a temporary build directory. Then you use the
> bootstrap version to build the final version which gets installed under
> the DESTDIR location. This way it doesn't use the version of itself
> that it's currently building. The bootstrap could be a full build,
> but ideally it would be a minimal build (i.e., just enough for the
> bootstrap). This feels like a more traditional bootstrapping scheme to
> me, and I think it would solve the problem you described above.
Ping?
Lewis
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