CMake Error at C:/Program Files/CMake/share/cmake-3.26/Modules/CMakeDetermineSystem.cmake:154 (message):

[Zing-desire]

D:\Downloads\Compressed\ncnn-webassembly-yolov5\build>cmake -DCMAKE_TOOLCHAIN_FILE=$EMSDK/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake -DWASM_FEATURE=basic ..
CMake Warning (dev) at CMakeLists.txt:1 (project):
cmake_minimum_required() should be called prior to this top-level project()
call. Please see the cmake-commands(7) manual for usage documentation of
both commands.
This warning is for project developers. Use -Wno-dev to suppress it.

CMake Error at C:/Program Files/CMake/share/cmake-3.26/Modules/CMakeDetermineSystem.cmake:154 (message):
Could not find toolchain file:
$EMSDK/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake
Call Stack (most recent call first):
CMakeLists.txt:1 (project)

-- Configuring incomplete, errors occurred!

我用windows在进行到这一步时，就报错了
cmake -DCMAKE_TOOLCHAIN_FILE=$EMSDK/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake -DWASM_FEATURE=basic ..
make -j4

我试了很久，一直没有解决，希望大佬们能够解决，谢谢