[SYCL-PTX] Fix libclc dependency path. (#2121)

Make sure libraries produced by libclc are systematically fully rebuild.

Signed-off-by: Victor Lomuller <[email protected]>

Author: Naghasan

libclc/cmake/modules/AddLibclc.cmake

@@ -74,27 +74,29 @@ macro(add_libclc_builtin_set arch_suffix)
   set( obj_suffix ${arch_suffix}.bc )
 
   # Add opt target
-  add_custom_command( OUTPUT "${LIBCLC_LIBRARY_OUTPUT_INTDIR}/builtins.opt.${obj_suffix}"
+  set( builtins_opt_path "${LIBCLC_LIBRARY_OUTPUT_INTDIR}/builtins.opt.${obj_suffix}" )
+  add_custom_command( OUTPUT "${builtins_opt_path}"
     COMMAND ${LLVM_OPT} -O3 -o
-    "${LIBCLC_LIBRARY_OUTPUT_INTDIR}/builtins.opt.${obj_suffix}"
+    "${builtins_opt_path}"
     "${LIBCLC_LIBRARY_OUTPUT_INTDIR}/builtins.link.${obj_suffix}"
     DEPENDS opt "builtins.link.${arch_suffix}" )
   add_custom_target( "opt.${obj_suffix}" ALL
-    DEPENDS "${LIBCLC_LIBRARY_OUTPUT_INTDIR}/builtins.opt.${obj_suffix}" )
+    DEPENDS "${builtins_opt_path}" )
   set_target_properties("opt.${obj_suffix}"
-    PROPERTIES TARGET_FILE "${LIBCLC_LIBRARY_OUTPUT_INTDIR}/builtins.opt.${obj_suffix}")
+    PROPERTIES TARGET_FILE "${builtins_opt_path}")
 
   # Add prepare target
-  add_custom_command( OUTPUT "${LIBCLC_LIBRARY_OUTPUT_INTDIR}/${obj_suffix}"
+  set( builtins_obj_path "${LIBCLC_LIBRARY_OUTPUT_INTDIR}/${obj_suffix}" )
+  add_custom_command( OUTPUT "${builtins_obj_path}"
     COMMAND prepare_builtins -o
-    "${LIBCLC_LIBRARY_OUTPUT_INTDIR}/${obj_suffix}"
+    "${builtins_obj_path}"
     "$<TARGET_PROPERTY:opt.${obj_suffix},TARGET_FILE>"
-    DEPENDS "opt.${obj_suffix}"
-    prepare_builtins )
+    DEPENDS ${builtins_opt_path}
+            prepare_builtins )
   add_custom_target( "prepare-${obj_suffix}" ALL
-    DEPENDS "${LIBCLC_LIBRARY_OUTPUT_INTDIR}/${obj_suffix}" )
+    DEPENDS "${builtins_obj_path}" )
   set_target_properties("prepare-${obj_suffix}"
-    PROPERTIES TARGET_FILE "${LIBCLC_LIBRARY_OUTPUT_INTDIR}/${obj_suffix}")
+    PROPERTIES TARGET_FILE "${builtins_obj_path}")
 
   # Add dependency to top-level pseudo target to ease making other
   # targets dependent on libclc.