project('cmake_code_gen', ['c', 'cpp']) cm = import('cmake') # Subproject with the "code generator" sub_pro = cm.subproject('cmCodeGen') sub_exe = sub_pro.target('genA') # Generate the source generated = custom_target( 'cmake-generated', input: [], output: ['test.cpp'], command: [sub_exe, '@OUTPUT@'] ) # Build the exe exe1 = executable('main1', ['main.cpp', generated]) test('test1', exe1)