[cmake] port torzu cmake build stuff for clang-cl

Signed-off-by: lizzie <lizzie@eden-emu.dev>

.patch/Boost/0001-clang-cl.patch

@@ -0,0 +1,24 @@
+diff -ruN a/libs/cobalt/include/boost/cobalt/concepts.hpp b/libs/cobalt/include/boost/cobalt/concepts.hpp
+--- a/libs/cobalt/include/boost/cobalt/concepts.hpp	2025-04-12 18:25:53.791233755 +0200
++++ b/libs/cobalt/include/boost/cobalt/concepts.hpp	2025-04-12 18:29:50.304496166 +0200
+@@ -62,7 +62,7 @@
+ template <typename T>
+ concept with_get_executor = requires (T& t)
+ {
+-  {t.get_executor()} -> asio::execution::executor;
++  t.get_executor();
+ };
+ 
+ 
+diff -ruN a/libs/context/CMakeLists.txt b/libs/context/CMakeLists.txt
+--- a/libs/context/CMakeLists.txt	2025-04-12 18:25:53.847233801 +0200
++++ b/libs/context/CMakeLists.txt	2025-04-12 18:29:33.436479899 +0200
+@@ -189,7 +189,7 @@
+ 
+   if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+     set_property(SOURCE ${ASM_SOURCES} APPEND PROPERTY COMPILE_OPTIONS "-x" "assembler-with-cpp")
+-  elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
++  elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND NOT MSVC)
+     set_property(SOURCE ${ASM_SOURCES} APPEND PROPERTY COMPILE_OPTIONS "-Wno-unused-command-line-argument")
+   endif()
+ 

CMakeLists.txt

@@ -748,6 +748,49 @@ if (MSVC AND CMAKE_GENERATOR STREQUAL "Ninja")
     )
 endif()
 
+# Adjustments for Clang-cl
+if (MSVC AND CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND ARCHITECTURE STREQUAL "x86_64")
+    set(LLVM_MINGW_VERSION 20250402)
+    # Set download URL and library path within the ZIP
+    set(ZIP_URL "https://github.com/mstorsjo/llvm-mingw/releases/download/${LLVM_MINGW_VERSION}/llvm-mingw-${LLVM_MINGW_VERSION}-ucrt-x86_64.zip")
+    set(LIB_PATH "llvm-mingw-${LLVM_MINGW_VERSION}-ucrt-x86_64/lib/clang/20/lib/windows/libclang_rt.builtins-x86_64.a")
+    # Set paths for download and extraction
+    set(DOWNLOAD_DIR "${CMAKE_BINARY_DIR}/llvm-mingw-download")
+    set(ZIP_FILE "${DOWNLOAD_DIR}/llvm-mingw.zip")
+    set(EXTRACTED_LIB "${DOWNLOAD_DIR}/${LIB_PATH}")
+    # Create download directory if it doesn't exist
+    file(MAKE_DIRECTORY "${DOWNLOAD_DIR}")
+    # Download and extract if the library doesn't exist
+    if(NOT EXISTS "${EXTRACTED_LIB}")
+        message(STATUS "Downloading llvm-mingw runtime libraries...")
+        # Download the ZIP file
+        file(DOWNLOAD
+            ${ZIP_URL}
+            ${ZIP_FILE}
+            SHOW_PROGRESS
+            # Uncomment and add EXPECTED_HASH if you know the SHA256 checksum
+            EXPECTED_HASH SHA256=4edc13d878b4ec49c2f1a6e9161abb093bbaefc8b7d129f3b3f57a22a4a41d38
+        )
+        message(STATUS "Extracting compiler-rt builtins library...")
+        # Extract the specific file from the ZIP
+        execute_process(
+            COMMAND ${CMAKE_COMMAND} -E tar xvf "${ZIP_FILE}" "${LIB_PATH}"
+            WORKING_DIRECTORY "${DOWNLOAD_DIR}"
+            RESULT_VARIABLE extraction_result
+        )
+        if(NOT extraction_result EQUAL 0)
+            message(FATAL_ERROR "Failed to extract library: ${extraction_result}")
+        endif()
+    endif()
+    # Create imported target for the library
+    add_library(llvm-mingw-runtime STATIC IMPORTED)
+    set_target_properties(llvm-mingw-runtime PROPERTIES
+        IMPORTED_LOCATION "${EXTRACTED_LIB}"
+    )
+    # Link the library to all executables in the project
+    link_libraries(llvm-mingw-runtime)
+endif()
+
 if (YUZU_USE_FASTER_LD AND CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     # We will assume that if the compiler is GCC, it will attempt to use ld.bfd by default.
     # Try to pick a faster linker.