[OE-core] [PATCH] dtc: Provide libfdt

[Andrew Jeffery]

On Mon, 5 Aug 2019, at 16:13, Adrian Bunk wrote:
> On Mon, Aug 05, 2019 at 04:01:57PM +0930, Andrew Jeffery wrote:
> > 
> > 
> > On Mon, 5 Aug 2019, at 14:35, Adrian Bunk wrote:
> > > On Mon, Aug 05, 2019 at 12:42:11PM +0930, Andrew Jeffery wrote:
> > > > Applications are appearing that depend on parsing flattened devicetree
> > > > in userspace on target devices, e.g. pdbg[1]. Mark dtc as providing
> > > > libfdt so application recipes can depend on it.
> > > > 
> > > > [1] https://github.com/open-power/pdbg
> > > 
> > > Shouldn't runtime dependencies on dtc already be autogenerated in this 
> > > case when you have dtc in DEPENDS?
> > 
> > "dtc" doesn't need to appear in depends for pdbg: "dtc-native" does for the
> > purpose of building the devicetrees shipped with the application, but "dtc"
> > doesn't and dtc(1) itself isn't required at runtime, rather we just need libfdt,
> >...
> 
> How do you link with libfdt without the non-native dtc in DEPENDS?

Currently pdbg includes a copy of libfdt. However, the build system tests for
the presence of a system copy and will prefer it over the included copy.

Andrew