commit 2565ffa31ea67650f95f65347ed8f5917c651fac
author Juan Ramos <juan@lunarg.com> Mon Jul 10 11:03:52 2023 -0600
committer Juan Ramos <114601453+juan-lunarg@users.noreply.github.com> Mon Jul 10 13:02:41 2023 -0600
tree b7a85c80528b6dffb33a4a8c63728a2b93f8344d
parent 485c0395ad85bcefe7aed17d23362d93f61f942d

cmake: Use share instead of DATADIR for CMake config files

See the following discussion for context:
https://discourse.cmake.org/t/what-should-the-destination-be-for-a-header-only-librarys-cmake-config-file/8473/3

TLDR: `DATADIR` can be `share` but it doesn't have to be. It can
be changed by the user.

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 28b8caf..b3db540 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -68,12 +68,10 @@
 
     set_target_properties(Vulkan-Headers PROPERTIES EXPORT_NAME "Headers")
 
-    set(cmake_install_dir "${CMAKE_INSTALL_DATADIR}/cmake/VulkanHeaders")
-
     install(TARGETS Vulkan-Headers EXPORT VulkanHeadersConfig INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
-    install(EXPORT VulkanHeadersConfig NAMESPACE "Vulkan::" DESTINATION "${cmake_install_dir}")
+    install(EXPORT VulkanHeadersConfig NAMESPACE "Vulkan::" DESTINATION "share/cmake/VulkanHeaders")
 
     set(version_config "${CMAKE_CURRENT_BINARY_DIR}/generated/VulkanHeadersConfigVersion.cmake")
     write_basic_package_version_file("${version_config}" COMPATIBILITY SameMajorVersion ARCH_INDEPENDENT)
-    install(FILES "${version_config}" DESTINATION "${cmake_install_dir}")
+    install(FILES "${version_config}" DESTINATION "share/cmake/VulkanHeaders")
 endif()