Add optional support for the cmake per user package registry.

Default is OFF to conform to latest cmake standard (3.15) and
because this feature can cause some confusion for unaware developers.

Change-Id: I00f9ec2185c27d2f6a8d2c7f294512a268a4e3f5

runtime/hsa-runtime/CMakeLists.txt

@@ -83,7 +83,7 @@ set ( PACKAGE_VERSION_STRING "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}
 
 ## Find external dependencies.
 find_package(LibElf REQUIRED)
-find_package(hsakmt 1.0 REQUIRED)
+find_package(hsakmt 1.0 REQUIRED HINTS ${CMAKE_INSTALL_PREFIX} PATHS /opt/rocm)
 
 ## Create the rocr target.
 add_library( ${CORE_RUNTIME_TARGET} "" )
@@ -309,6 +309,20 @@ install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${CORE_RUNTIME_TARGET}-config.cmake ${
   DESTINATION lib/cmake/${CORE_RUNTIME_TARGET}
   COMPONENT dev)
 
+# Optionally record the package's find module in the user's package cache.
+if ( NOT DEFINED EXPORT_TO_USER_PACKAGE_REGISTRY )
+  set ( EXPORT_TO_USER_PACKAGE_REGISTRY "off" )
+endif()
+set ( EXPORT_TO_USER_PACKAGE_REGISTRY ${EXPORT_TO_USER_PACKAGE_REGISTRY} CACHE BOOL "Add cmake package config location to the user's cmake package registry.")
+if(${EXPORT_TO_USER_PACKAGE_REGISTRY})
+  # Enable writing to the registry
+  set(CMAKE_EXPORT_PACKAGE_REGISTRY ON)
+  # Generate a target file for the build
+  export(TARGETS ${CORE_RUNTIME_TARGET} NAMESPACE ${CORE_RUNTIME_TARGET}:: FILE ${CORE_RUNTIME_TARGET}Targets.cmake)
+  # Record the package in the user's cache.
+  export(PACKAGE ${CORE_RUNTIME_TARGET})
+endif()
+
 ## Packaging directives
 set ( CPACK_GENERATOR "DEB;RPM" CACHE STRING "Package types to build")