QVAC-6158: Fix CI cmake pkg on Tether fork

[jesusmb1995]

Our install path is not based on /lib but /shared. Update the workflow so that the files are found on the correct folder for our fork. In addition, CMake needs to link against llama::llama not llama to be able to find the correct include directories.

See CI for cmake-pkg now green: https://github.com/tetherto/qvac-ext-lib-llama.cpp/actions/runs/18161795175/job/51694115100?pr=27#logs

Seems to be related to this changes that we introduced in our fork:

install(
  EXPORT llama-targets
  FILE llama-targets.cmake
  NAMESPACE llama::
  DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/llama)

install(
  FILES ${CMAKE_CURRENT_BINARY_DIR}/llama-config.cmake
  DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/llama)

CMAKE_INSTALL_DATAROOTDIR is a CMake variable that defines the root directory for read-only architecture-independent data files, with a default value of "share".
This variable is part of the GNUInstallDirs module, which provides standard installation directory variables as defined by the GNU Coding Standards.

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[olyasir]

just for my understanding, does not runners defines in the yaml file? how come we use different runners than upstream repo?

[jesusmb1995]

They are using self-hosted runners, even for Linux in order to test in multiple hardware. That already could be causing some differences in the default install dir of the environment.

However, I think you are right. This one might not be related to runners at all since GH Linux Ubuntu runner should still use the default /lib (edited the description). Looking more closely at our changes I think its related to the modified CMakeLists.txt where we added the following:

install(
  EXPORT llama-targets
  FILE llama-targets.cmake
  NAMESPACE llama::
  DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/llama)

install(
  FILES ${CMAKE_CURRENT_BINARY_DIR}/llama-config.cmake
  DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/llama)