Allow ccache enabled builds if -DROCM_CCACHE_BUILD=ON

Change-Id: Ie3ebb5d95af5fa55f11c9c88378ab29736538e25


[ROCm/ROCR-Runtime commit: 7d8205548b]

projects/rocr-runtime/runtime/hsa-runtime/CMakeLists.txt

@@ -51,6 +51,17 @@ set ( CORE_RUNTIME_TARGET "${CORE_RUNTIME_NAME}64" )
 set ( CORE_RUNTIME_LIBRARY "lib${CORE_RUNTIME_TARGET}" )
 project( ${CORE_RUNTIME_TARGET} )
 
+# Optionally, build HSA Runtime with ccache.
+set(ROCM_CCACHE_BUILD OFF CACHE BOOL "Set to ON for a ccache enabled build")
+if (ROCM_CCACHE_BUILD)
+  find_program(CCACHE_PROGRAM ccache)
+  if (CCACHE_PROGRAM)
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ${CCACHE_PROGRAM})
+  else()
+    message(WARNING "Unable to find ccache. Falling back to real compiler")
+  endif() # if (CCACHE_PROGRAM)
+endif() # if (ROCM_CCACHE_BUILD)
+
 list ( APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake_modules" )
 include ( utils )
 include ( hsa_common )