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Consider the following minimal project

CMakeLists.txt

cmake_minimum_required(VERSION 3.19)
project(optdep)

add_library(myStatic STATIC func.cpp)
add_library(myShared SHARED impl.cpp)

target_link_libraries(myStatic PRIVATE myShared)

set_target_properties(myStatic PROPERTIES OPTIMIZE_DEPENDENCIES YES)

func.cpp

#include "impl.h"

int func()
{
    return 42 + impl();
}

impl.cpp

#error I should not be built

impl.h

int impl();

Running CMake on the above project and building just the myStatic target should result in func.cpp being compiled and the myStatic static library being built, but the myShared library should NOT be built due to the OPTIMIZE_DEPENDENCIES property on myStatic. This works for the Unix Makefiles, Xcode and Visual Studio generators, but not for Ninja. Ninja still tries to compile impl.cpp.