cmake fails to compile a gd mod (macos) - c++

Question

I wanted to make a GD mod using c++, but when it compiles, i get this error:
[cmake] CMake Error at CMakeLists.txt:5 (project):
[cmake] Generator
[cmake]
[cmake] Unix Makefiles
[cmake]
[cmake] does not support platform specification, but platform
[cmake]
[cmake] darwin
[cmake]
[cmake] was specified.
[cmake]
[cmake]
[cmake] Not searching for unused variables given on the command line.
[cmake] -- Configuring incomplete, errors occurred!
𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺𝅺
my CMakeLists.txt file:
cmake_minimum_required(VERSION 3.3.0)
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
project(IlliaGDMod VERSION 1.0.0)
# Use GLOB_RECURSE instead of GLOB
# to recursively add all source files
# under src/
file(GLOB SOURCES
src/*.cpp
)
# Set up the mod binary
add_library(${PROJECT_NAME} SHARED ${SOURCES})
if (NOT DEFINED ENV{GEODE_SDK})
message(FATAL_ERROR "Geode SDK not found")
else()
message(STATUS "Found Geode: $ENV{GEODE_SDK}")
endif()
set(GEODE_LINK_NIGHTLY ON)
add_subdirectory($ENV{GEODE_SDK} $ENV{GEODE_SDK}/build)
target_link_libraries(${PROJECT_NAME} geode-sdk)
create_geode_file(${PROJECT_NAME})
I used VSCode 1.72.2, compiler clang
Does anyone have any ideas on why this happens?
also, i used the visual studio code cmake tools to compile it