project('subproject isolation', ['c', 'cpp']) incdir = meson.source_root() / 'incDir' cm = import('cmake') # This should generate a warning and the include dir should be skipped. sub_pro = cm.subproject('cmMod', cmake_options : [ '-DMESON_INC_DIR=' + incdir ]) sub_dep = sub_pro.dependency('cmModLib++') # Since the include dir is skipped, the compilation of this project should fail. exe1 = executable('main', ['main.cpp'], dependencies: [sub_dep]) test('test1', exe1)