[PATCH] D117639: [cmake] Avoid warning or extra suffix for CMAKE_INSTALL_LIBDIR

[Alexander Richardson via Phabricator via llvm-commits]

arichardson added a comment.

I believe `LLVM_LIBDIR_SUFFIX` was added as a workaround for not being able to use GNUInstallDirs (which will automatically detect the right suffixed e.g. for SuSE) in rG46fed3b475ddd92d02d9b72d0d77c5a939f132d1 <https://reviews.llvm.org/rG46fed3b475ddd92d02d9b72d0d77c5a939f132d1>. Would it be possible to move the include() below the `project()/enable_language()` calls so that CMake can detect the expected libdir suffix and then use something like the following:

  # If LLVM_LIBDIR_SUFFIX is defined, we use that to override the libdir, otherwise GNUInstallDirs defaults should be correct.
  if(DEFINED LLVM_LIBDIR_SUFFIX)
    message(DEPRECATION "LLVM_LIBDIR_SUFFIX is deprecated, set CMAKE_INSTALL_LIBDIR to lib${LLVM_LIBDIR_SUFFIX} instead")
    set(CMAKE_INSTALL_LIBDIR lib${LLVM_LIBDIR_SUFFIX})
  endif()
  include(GNUInstallDirs)


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D117639