Trying to use clangd with VSCodium, CMake_World_COMPILER not set

[scassowary]

I am using VSCodium and, in the absence of the C/C++ microsoft extension, I have installed the "clangd" extension instead. I would like to get clangd to work. Currently, my C code does compile and run, but there is an error by clangd that says that <stdio.h> file is not found.

• I have figured out that it's because compile_commands.json is required for clangd to work.
• When I searched the clangd extension page, it said the easiest way to do it is with CMake
• I create a CMakeLists.txt:

cmake_minimum_required(VERSION 3.10)

project(Hello World)

set(SOURCE_FILES helloworld.c)

add_executable(HelloWorld ${SOURCE_FILES})

• Then I try to use "cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=1". This didn't work and said that "CMAKE_World_COMPILER not set"
• I tried adding set(CMAKE_C_COMPILER "C:/msys64/mingw64/bin/gcc.exe") to the CMakeLists.txt, as well as set(CMAKE_CXX_COMPILER "C:/msys64/mingw64/bin/g++.exe")
• Trying to run the command again still gave me the same "CMAKE_World_COMPILER not set". I search this up online, which only gave me results for either CMAKE_C_COMPILER or CMAKE_CXX_COMPILER. But I have already set those!
• I look online and found what seems to be a solution. I add set(CMAKE_EXPORT_COMPILE_COMMANDS ON) to the CMakeLists.txt. When I try to run "cmake ." in the terminal, the same "CMAKE_World_COMPILER not set" error appears.

My CMakeLists.txt:

cmake_minimum_required(VERSION 3.10)

set(CMAKE_C_COMPILER "C:/msys64/mingw64/bin/gcc.exe")
set(CMAKE_CXX_COMPILER "C:/msys64/mingw64/bin/g++.exe")

project(Hello World)

set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

set(SOURCE_FILES helloworld.c)

add_executable(HelloWorld ${SOURCE_FILES})

Full "CMAKE_World_COMPILER not set" error:

CMake Error at CMakeLists.txt:6 (project):
  Running

   'nmake' '-?'

  failed with:

   no such file or directory


CMake Error: CMAKE_World_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!

TLDR: How do I make CMake work, and in turn, generate a compile_commands.json using CMake? Or should I skip over using CMake altogether and just make the compile_commands.json manually?