Use \ instead of string(CONCAT)

Author: vlad-perevezentsev

CMakeLists.txt

@@ -25,15 +25,13 @@ option(DPCTL_GENERATE_COVERAGE_FOR_PYBIND11_EXTENSIONS
     "Build dpctl pybind11 offloading extensions with coverage instrumentation"
     OFF
 )
-string(CONCAT _desc_target_cuda
-    "Build DPCTL to target CUDA device. "
-    "Set to a truthy value (e.g., ON, TRUE) to use default architecture (sm_50), "
-    "or to a specific architecture like sm_80."
-)
+
 set(DPCTL_TARGET_CUDA
     ""
     CACHE STRING
-    "${_desc_target_cuda}"
+    "Build DPCTL to target CUDA device. \
+Set to a truthy value (e.g., ON, TRUE) to use default architecture (sm_50), \
+or to a specific architecture like sm_80."
 )
 set(DPCTL_TARGET_HIP
     ""