Set a dummy CMAKE_INSTALL_LIBDIR in order to silence the following CMake
warning when executing LLVMInstallSymlink.cmake script:
CMake Warning (dev) at /usr/share/cmake/Modules/GNUInstallDirs.cmake:243 (message):
Unable to determine default CMAKE_INSTALL_LIBDIR directory because no
target architecture is known. Please enable at least one language before
including GNUInstallDirs.
Call Stack (most recent call first):
/usr/lib/llvm/16/lib64/cmake/llvm/LLVMInstallSymlink.cmake:5 (include)
tools/lld/cmake_install.cmake:66 (include)
cmake_install.cmake:52 (include)
Differential Revision: https://reviews.llvm.org/D136573
# DESTDIR environment variable may be unset at configuration time.
# See PR8397.
+# Set to an arbitrary directory to silence GNUInstallDirs warnings
+# regarding being unable to determine libdir.
+set(CMAKE_INSTALL_LIBDIR "lib")
include(GNUInstallDirs)
function(install_symlink name target outdir)