On Tue, Jun 5, 2018 at 2:33 AM, Albert Chan <albertmcchan@yahoo.com> wrote:For 53 bits double, to make same math result across platform,maybe add this to Lua.c ? (even if not needed)fesetenv (FE_PC53_ENV);I suspect the result of that will not be truly cross-platform. Most platforms will fail to compile that [1], but I guess there is one that you happen to use (which one is it?) where that works. To make this truly cross-platform, you should rather say in its stead: #error I cannot set floating-point precision in a cross-platform way [2]Cheers,V.