[llvm] [SYCL] Add platform enumeration and info query using liboffload (PR #166927)

[Kseniya Tikhomirova via llvm-commits]

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@@ -117,10 +115,23 @@ add_custom_command(
 install(DIRECTORY "${LIBSYCL_SOURCE_INCLUDE_DIR}/sycl" DESTINATION ${LIBSYCL_INCLUDE_DIR} COMPONENT sycl-headers)
 install(DIRECTORY "${LIBSYCL_SOURCE_INCLUDE_DIR}/CL" DESTINATION ${LIBSYCL_INCLUDE_DIR} COMPONENT sycl-headers)
 
-set(LIBSYCL_RT_LIBS ${LIBSYCL_SHARED_OUTPUT_NAME})
-
-add_subdirectory(src)
+set(LIBSYCL_LIB_NAME "sycl")
+set(LIBSYCL_SHARED_OUTPUT_NAME "${LIBSYCL_LIB_NAME}")
+if (CMAKE_SYSTEM_NAME STREQUAL Windows)
+  if (CMAKE_MSVC_RUNTIME_LIBRARY AND (NOT CMAKE_MSVC_RUNTIME_LIBRARY MATCHES "DLL$"))
+      message(FATAL_ERROR "libsycl requires a DLL version of the MSVC CRT.")
+  endif()
+  if ((NOT CMAKE_MSVC_RUNTIME_LIBRARY AND uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
+      OR (CMAKE_MSVC_RUNTIME_LIBRARY STREQUAL "MultiThreadedDebugDLL"))
+    set(LIBSYCL_SHARED_OUTPUT_NAME "${LIBSYCL_SHARED_OUTPUT_NAME}d")
+  endif()
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KseniyaTikhomirova wrote:

Hi Tom, these code is just moved from src/CMakeLists.txt one layer above. I think we have already discussed this strategy in "add libsycl" PR. We can reiterate that discussion but it is not a target for this PR.

https://github.com/llvm/llvm-project/pull/166927