slang-rhi cmake integration (#6261)

* update slang-rhi cmake integration

* disable fetching slang

* update slang-rhi

Author: skallweitNV

CMakePresets.json

@@ -23,6 +23,7 @@
       "cacheVariables": {
         "SLANG_SLANG_LLVM_FLAVOR": "DISABLE",
         "SLANG_ENABLE_SPLIT_DEBUG_INFO": "OFF",
+        "SLANG_ENABLE_SLANG_RHI": "OFF",
         "CMAKE_C_FLAGS_INIT": "-fwasm-exceptions -Os",
         "CMAKE_CXX_FLAGS_INIT": "-fwasm-exceptions -Os",
         "CMAKE_EXE_LINKER_FLAGS": "-sASSERTIONS -sALLOW_MEMORY_GROWTH -fwasm-exceptions --export=__cpp_exception"

external/CMakeLists.txt

@@ -97,11 +97,11 @@ target_include_directories(stb INTERFACE "${CMAKE_CURRENT_LIST_DIR}/stb")
 
 # slang-rhi
 if(SLANG_ENABLE_SLANG_RHI)
+    set(SLANG_RHI_BUILD_FROM_SLANG_REPO ON)
     set(SLANG_RHI_BINARY_DIR ${CMAKE_BINARY_DIR}/$<CONFIG>/bin)
+    set(SLANG_RHI_FETCH_SLANG OFF)
     set(SLANG_RHI_SLANG_INCLUDE_DIR ${slang_SOURCE_DIR}/include)
     set(SLANG_RHI_SLANG_BINARY_DIR ${CMAKE_BINARY_DIR})
-    set(SLANG_RHI_BUILD_TESTS OFF)
-    set(SLANG_RHI_BUILD_EXAMPLES OFF)
 
     # Not disabling these break tests (issue #5474)
     set(SLANG_RHI_FETCH_DXC OFF)