require 'mkmf' base_fig = 0 src = ("(BASE > 0) && " "(BASE * (BASE+1)) > BASE && " "(BASE * (BASE+1)) / BASE == (BASE+1)") while try_static_assert(src, nil, "-DBASE=10#{'0'*base_fig}UL") base_fig += 1 end $defs << "-DBASE=1#{'0'*base_fig}UL" << "-DBASE_FIG=#{base_fig}" create_makefile('bigdecimal')