install option for HAL appears to be broken

[crheckman]

I think I've come across a pretty nasty bug: make install on HAL results in a libhal.so not being resolvable for the downstream package linker. My steps to figure this out were:

1. make install HAL the normal way
2. Try building & linking arpg_apps against it and run SensorViewer; resulted in error at runtime that libhal.so couldn't be found.
3. make uninstall HAL, turn on CMake Exports (-DEXPORT_HAL=ON) and re-run cmake.
4. Rebuild & relink arpg_apps and run SensorViewer; expected behavior results (e.g. camera stream starts).

My guess is there's been a change in cmake behavior and how it interacts with our install_package script.

[sinaaghli]

so did you have arpg_apps installed ahead of make installing HAL?
I do face this issue when I don't install the libraries in order.

[crheckman]

No, I installed them in order.