project('ssp', 'cpp', default_options : ['warning_level=3', 'cpp_std=c++17', 'buildtype=debugoptimized']) fast_float_sub = subproject('fast_float') fast_float_dep = fast_float_sub.get_variable('fast_float_dep') ssp_dep = declare_dependency( include_directories: include_directories('include'), dependencies: fast_float_dep ) subdir('test')