[OE-core] non-standard library locations and rpath

[Jack Mitchell]

I'm having some troubles with shared library, shared library 
dependencies and rpaths. I have libfoo, which depends on libbar when I 
try to link libfoo with my app, it requires libbar to be found. libbar 
is in a non-standard location, /usr/local/bar when I compiled libfoo, I 
used -Wl,rpath-link ${STAGING_SYSROOT}/usr/local/bar and -Wl,rpath 
/usr/local/bar. Now when I come to try link my app with libfoo, it fails 
to link as it can't find libbar, which I assume means the rpath in 
libfoo isn't being properly prepending with sysroot what is the proper 
way to support this in OE? My library has the following rpath information:

0x0000000f (RPATH) Library rpath: [$ORIGIN/../lib:/usr/local/bar]

So why isn't the rpath being prepended with the sysroot when I compile 
my app and link libfoo? The apps build system is using cmake, but this 
should be a built in linker feature, correct?

Cheers,
Jack.