[cmake-developers] RPATH info missing when using a genex (Was: Recommended use of imported targets...)

[Alexander Neundorf]

On Thursday 28 February 2013, Stephen Kelly wrote:
> Brad King wrote:
> > On 02/27/2013 04:37 PM, Alexander Neundorf wrote:
> >> 1) we should continue to recommend to use the variables (which will now
> >> be set to the name of the target). In case of typos, this will lead to
> >> an empty variable (as it did before with Find-modules), and undefined
> >> references when linking. This is at least no regression.
> >> Also, it shields users somewhat from potential renaming of the imported
> >> targets.
> > 
> > This is up to individual projects based on their own requirements.
> > Some interface may be more stable than others.  I do not think any
> > general recommendation can be made without lots of contingencies.
> > 
> >> safe_target_link_libraries(hello TARGET:foox
> >> 
> >>                                  FILE:/opt/lib/libbar.a
> >>                                  LIBRARY:png)
> > 
> > Sure, it is possible to make interfaces typo-resistant by adding lots
> > of syntax.  Part of the simplicity tll() is that it has little syntax.
> > 
> > Note that FILE: and LIBRARY: do not need to be distinguished from
> > one another because files always have paths (/) and library names
> > never do.  For TARGET: we already have $<TARGET_NAME:foox>, which
> > IIUC can be used in tll already (Steve?).
> 
> That works, but it doesn't check anything. Checking is only done at export-
> time (though it could also check for existence at generate time).

So if I would do (I don't plan to)

target_link_libraries(foo <TARGET_NAME:png> )

it would not check that there is a target named "png" ?

Alex