[cmake-developers] rpaths on Mac

[Brad King]

On 11/21/2011 3:41 PM, James Bigler wrote:
> Would what you are proposing make the following easier?  This is how I setup @rpath on my system.
>
> Why do you need something special?  I use @rpath for the install name by doing the following:
>
>    if(RELEASE_PUBLIC)
>      set_target_properties( my_target PROPERTIES
>        INSTALL_NAME_DIR "@rpath"
>        BUILD_WITH_INSTALL_RPATH ON
>        )
>    endif()
>
> Then I do the following for my executables:
>
>      if( RELEASE_INSTALL_BINARY_SAMPLES )
>        target_link_libraries( ${target_name}
>          -Wl,-rpath, at executable_path/.
>          -Wl,-rpath, at executable_path/../../lib
>          )
>      elseif( RELEASE_PUBLIC)
>        target_link_libraries( ${target_name}
>          -Wl,-rpath, at executable_path/../lib
>          )
>      endif()

CMake supports RPATH naturally on other platforms but that implementation
predated RPATH support on OS X.  Now we want to activate it to work the
same on OS X as on other platforms, but in a compatible and sensible way.
My proposal to switch off INSTALL_NAME_DIR==@rpath would actually break
your example, so perhaps we need another way to switch on the behavior.

-Brad