def build(bld):
    bld.objects(source=bld.get_sub_files(max_depth=1), 
                target="common",
                includes = ['.','..'],
        )
    
    bld.objects(source=bld.get_sub_files(max_depth=1), 
                target="common_sh",
                cxxflags=bld.env.CXXFLAGS_cxxshlib,
                includes = ['.','..'],
        )