# Try using sourceset with various kinds of generated sources project('a', 'c') cp = find_program('cp.py') source_set = import('sourceset') sources = source_set.source_set() a_c = custom_target('gen-custom-target', input: 'a.c', output: 'out_a.c', command: [cp, '@INPUT@', '@OUTPUT@']) sources.add(when: 'YES', if_true: a_c) sources.add(when: 'YES', if_true: a_c[0]) f_c = configure_file(input: 'f.c', output: 'out_f.c', copy: true) sources.add(when: 'YES', if_true: f_c) sources.add(when: 'YES', if_true: f_c) gen = generator(cp, output: 'out_@PLAINNAME@', arguments: ['@INPUT@', '@OUTPUT@']) g_c = gen.process(files('g.c')) sources.add(when: 'YES', if_true: g_c) sources.add(when: 'YES', if_true: g_c) conf1 = { 'YES': true, } result1 = sources.apply(conf1) executable('first', sources: result1.sources(), dependencies: result1.dependencies())