I would like to build Lua 5.3+ with only support for Integer numbers
Is it a 1-April question?
Sorry, I'm answering from another timezone, your letter has arrived on April 2nd :-)
It's not clear, what would be the difference between Lua 5.3 and "integers-only Lua 5.3"?
Even if FP are emulated in software on your system, the C compiler does have FP datatype anyway.
So, just avoid using FP literals/operators/functions in Lua scripts if FP operations are CPU-intensive.
Or your main goal is to warn a user by generating a compile time error?
