Add Trilinos/Albany rpath to export_albany

[jewatkins]

When I build MALI, I usually add this to avoid having to add albany/trilinos to my system library search path at runtime:

MPAS_EXTERNAL_LIBS="${ALBANY_LINK_LIBS} -Wl,-R${ALBANY_INSTALL}/lib64 -Wl,-R${TRILINOS_INSTALL}/lib64"

Does it make sense to just add it as part of export_albany.in?

@mperego @bartgol I'm not extremely familiar with how cmake generates this file anymore with all the changes so not sure how we would do it. I don't think this is urgent, more a QOL change.

[bartgol]

I thought we were linking all libraries via full system path, so there shouldn't be any need for adding path to the link line. Are you dating you get immediate references at Link time or ld run-time lead errors?

[mperego]

I think @jewatkins is talking about run-time errors. I'm in favor of adding that to the export_albany.in or anyway for a solution that does not require to explicitly export Trilinos and albnay libraries in the LD_LIBRARY_PATH.

[jewatkins]

right runtime errors

[jewatkins]

My understanding is that -rpath or -R adds the path to the executable (in this case, MALI) for the runtime linker.

[bartgol]

Ok. Adding to export_albany.in is fine then.