From 653fde89ca16f3b08a925c8a06d1f1a391e90f21 Mon Sep 17 00:00:00 2001
From: Romain Biessy <romain.biessy@codeplay.com>
Date: Tue, 12 Mar 2024 14:53:42 +0100
Subject: [PATCH] Update FindDPCPP to find new include path (#144)

---
 cmake/Modules/FindDPCPP.cmake | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/cmake/Modules/FindDPCPP.cmake b/cmake/Modules/FindDPCPP.cmake
index 8aa99533..cdbc89fa 100644
--- a/cmake/Modules/FindDPCPP.cmake
+++ b/cmake/Modules/FindDPCPP.cmake
@@ -30,16 +30,18 @@ include(FindPackageHandleStandardArgs)
 get_filename_component(DPCPP_BIN_DIR ${CMAKE_CXX_COMPILER} DIRECTORY)
 find_library(DPCPP_LIB NAMES sycl sycl6 PATHS "${DPCPP_BIN_DIR}/../lib")
 
+# Look for the include directory containing SYCL headers in multiple possible locations
+find_path(DPCPP_INCLUDE_DIR sycl
+  HINTS ${DPCPP_BIN_DIR}/../include ${DPCPP_BIN_DIR}/../../include
+  NO_DEFAULT_PATH
+)
+
 find_package_handle_standard_args(DPCPP
   FOUND_VAR     DPCPP_FOUND
-  REQUIRED_VARS DPCPP_LIB
+  REQUIRED_VARS DPCPP_LIB DPCPP_INCLUDE_DIR
 )
 
-if(NOT DPCPP_FOUND)
-  return()
-endif()
-
-mark_as_advanced(DPCPP_FOUND DPCPP_LIB)
+mark_as_advanced(DPCPP_FOUND DPCPP_LIB DPCPP_INCLUDE_DIR)
 
 if(DPCPP_FOUND AND NOT TARGET DPCPP::DPCPP)
   set(CMAKE_CXX_STANDARD 17)
@@ -49,7 +51,8 @@ if(DPCPP_FOUND AND NOT TARGET DPCPP::DPCPP)
     INTERFACE_COMPILE_OPTIONS ${COMPILE_FLAGS}
     INTERFACE_LINK_OPTIONS ${COMPILE_FLAGS}
     INTERFACE_LINK_LIBRARIES ${DPCPP_LIB}
-    INTERFACE_INCLUDE_DIRECTORIES "${DPCPP_BIN_DIR}/../include/sycl;${DPCPP_BIN_DIR}/../include")
+    INTERFACE_INCLUDE_DIRECTORIES "${DPCPP_INCLUDE_DIR}"
+  )
 endif()
 
 function(add_sycl_to_target)