cmake_minimum_required(VERSION 3.13...3.24 FATAL_ERROR) project(qoi C CXX) # do fetch or subtree #add_library(stb INTERFACE) #target_include_directories(stb SYSTEM INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}") # static lib with impl add_library(qoi "qoi.cpp") #target_link_libraries(qoi stb)