[Buildroot] [PATCH v2] libp11: Add new package for OpenSSL PKCS#11 engine

[Trent Piepho <tpiepho@impinj.com>]

On Thu, 2019-04-04 at 21:45 +0200, Thomas Petazzoni wrote:
> 
> > Library for using PKCS#11, which includes an engine for OpenSSL that
> > lets it use PKCS#11 modules.  Which is really what this package is
> > about, not that libp11 library itself, which has no users outside the of
> > OpenSSL engine.
> > 
> > 
> It also needs host-pkgconf, because pkg-config is used to detect
> OpenSSL.

I had assumed this was implicit in an autotools-package, but I see that
it is not.

> 
> Then, even with this fixed, the package didn't build because it was
> installing its OpenSSL modules in the wrong folder, as pkg-config
> --variable enginesdir libcrypto returned a bogus value. I fixed that by
> passing --with-enginesdir.

This is interesting, as when I made this patch for an older buildroot,
pkgconfig would return the correct value.  It was not prefixed with the
stage.  This is a new behavior.

And it looks like this already hit a bunch of packages with things like
the x11 app-defaults dir.  Since "libdir" is in the whitelist of paths
to prefix, it also hits enginesdir since the latter is based on libdir.

Maybe that pkg-config whitelist should not affect variables that use
libdir and only prefix libdir itself?