MRB_USE_MALLOC_TRIM
mruby3.md
- `MRB_WITHOUT_FLOAT` => `MRB_NO_FLOAT` - `MRB_USE_FLOAT` => `MRB_USE_FLOAT32` The former is to use `USE_XXX` naming convention. The latter is to make sure `float` is 32bit float and not floating point number in general.
MRUBY_CONFIG
That describes the changes in `mruby3`.