cmake: exported target is broken

[ael-code]

I'm experiencing an issue with an old cmake version (2.8.12.2).

The installation of exported target generates the ${INSTALL_PREFIX}/share/mercury/mercury-targets.cmake. Turns out that the na target has a wrong INTERFACE_INCLUDE_DIRECTORIES property. Looking at the generated mercury-targets.cmake code:

# Create imported target na
add_library(na SHARED IMPORTED)

set_target_properties(na PROPERTIES
  INTERFACE_INCLUDE_DIRECTORIES "${_IMPORT_PREFIX}/include"
  INTERFACE_LINK_LIBRARIES "mercury_util;/opt/adafs/build_deps/lib/libbmi.so;/opt/adafs/build_deps/lib/libcci.so;/opt/adafs/build_deps/lib/libfabric.so"
)

The problem is that ${_IMPORT_PREFIX} is empty. Thus the na target ends up having /include as include directory, that is obviously wrong.

Probably this is related to this issue that I've found https://cmake.org/Bug/view.php?id=15258

[soumagne]

Thanks for reporting the problem, it should be fine now.