feat: Windows on Arm prebuilt binary (#181)

Author: giladgd

.github/workflows/build.yml

@@ -201,7 +201,7 @@ jobs:
             await buildBinary("x64", ["--gpu", "false"]);
             await buildBinary("x64", ["--gpu", "cuda"]);
             await buildBinary("x64", ["--gpu", "vulkan"]);
-            // await buildBinary("arm64", ["--gpu", "false"], windowsOnArmNodeVersion); // disabled arm64 for now as compilation doesn't work
+            await buildBinary("arm64", ["--gpu", "false"], windowsOnArmNodeVersion);
           } else if (process.env.ARTIFACT_NAME === "linux") {
             await buildBinary("x64", ["--gpu", "false"]);
             await buildBinary("x64", ["--gpu", "cuda"]);

llama/toolchains/win32.host-x64.target-arm64.cmake

@@ -0,0 +1,41 @@
+set(CMAKE_SYSTEM_NAME Windows)
+set(CMAKE_SYSTEM_PROCESSOR ARM64)
+
+# Look for cl.exe in the Visual Studio installation directories
+set(PROGRAMFILES "$ENV{ProgramFiles}")
+set(PROGRAMFILES_X86 "$ENV{ProgramFiles\(x86\)}")
+
+set(VS_INSTALL_PATHS
+    "${PROGRAMFILES_X86}/Microsoft Visual Studio"
+    "${PROGRAMFILES}/Microsoft Visual Studio"
+    "C:/Program Files (x86)/Microsoft Visual Studio"
+    "C:/Program Files/Microsoft Visual Studio"
+)
+foreach(PATH IN LISTS VS_INSTALL_PATHS)
+    if(CL_EXE_PATH)
+        break()
+    endif()
+
+    file(GLOB_RECURSE FOUND_CL_EXE "${PATH}/*/VC/Tools/MSVC/*/bin/Hostx64/arm64/cl.exe")
+    if(FOUND_CL_EXE)
+        list(GET FOUND_CL_EXE 0 CL_EXE_PATH)
+        break()
+    endif()
+
+    if(CL_EXE_PATH)
+        break()
+    endif()
+
+    file(GLOB_RECURSE FOUND_CL_EXE "${PATH}/**/*/VC/Tools/MSVC/*/bin/Hostx64/arm64/cl.exe")
+    if(FOUND_CL_EXE)
+        list(GET FOUND_CL_EXE 0 CL_EXE_PATH)
+        break()
+    endif()
+endforeach()
+
+if(NOT CL_EXE_PATH)
+    message(FATAL_ERROR "cl.exe not found for ARM architecture.")
+else()
+    set(CMAKE_C_COMPILER "${CL_EXE_PATH}")
+    set(CMAKE_CXX_COMPILER "${CL_EXE_PATH}")
+endif()