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Merge pull request #5215 from shuujii/update-Configuration-Options-Changed-in-doc-mruby3.md

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Update "Configuration Options Changed" in `doc/mruby3.md` [ci skip]
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Yukihiro "Matz" Matsumoto
2020-12-05 22:19:41 +09:00
committed by GitHub
parent 6e5a0f623f f84668f8d5
commit 1b6efeef57
1 changed files with 22 additions and 17 deletions
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@@ -39,25 +39,31 @@ We have ported some new syntax from CRuby.
# Configuration Options Changed
Some configuration macro names are changed for consistency
## Renamed for consistency
## `MRB_NO_FLOAT`
Some configuration macro names are changed for consistency (use `MRB_USE_XXX`
or `MRB_NO_XXX`).
Changed from `MRB_WITHOUT_FLOAT` to conform `USE_XXX` naming
convention.
| mruby2 | mruby3 |
|--------------------------------|---------------------------|
| `MRB_ENABLE_ALL_SYMBOLS` | `MRB_USE_ALL_SYMBOLS` |
| `MRB_ENABLE_CXX_ABI` | `MRB_USE_CXX_ABI` |
| `MRB_ENABLE_CXX_EXCEPTION` | `MRB_USE_CXX_EXCEPTION` |
| `MRB_ENABLE_DEBUG_HOOK` | `MRB_USE_DEBUG_HOOK` |
| `MRB_DISABLE_DIRECT_THREADING` | `MRB_NO_DIRECT_THREADING` |
| `MRB_DISABLE_STDIO` | `MRB_NO_STDIO` |
| `MRB_METHOD_T_STRUCT` | `MRB_USE_METHOD_T_STRUCT` |
| `MRB_USE_FLOAT` | `MRB_USE_FLOAT32` |
| `MRB_WITHOUT_FLOAT` | `MRB_NO_FLOAT` |
| `ENABLE_LINENOISE` | `MRB_USE_LINENOISE` |
| `ENABLE_READLINE` | `MRB_USE_READLINE` |
| `DISABLE_MIRB_UNDERSCORE` | `MRB_NO_MIRB_UNDERSCORE` |
## `MRB_USE_FLOAT32`
Changed from `MRB_USE_FLOAT` to make sure `float` here means
using single precision float, and not the opposite of
`MRB_NO_FLOAT`.
## `MRB_USE_METHOD_T_STRUCT`
Changed from `MRB_METHOD_T_STRUCT`.
To use `struct` version of `mrb_method_t`. More portable but consumes more memory.
Turned on by default on 32bit platforms.
* `MRB_USE_FLOAT32` is changed from `MRB_USE_FLOAT` to make sure `float` here
means using single precision float, and not the opposite of `MRB_NO_FLOAT`.
* `MRB_USE_METHOD_T_STRUCT` uses `struct` version of `mrb_method_t`. More
portable but consumes more memory. Turned on by default on 32bit platforms.
* `MRB_` prefix is added to those without.
## `MRB_NO_BOXING`
@@ -141,7 +147,6 @@ No more operand extention
Jump addresses used to be specified by absolute offset from the start of `iseq`. Now they are relative offset from the address of the next instruction.
## `Random` now use `xoshiro128++`.
For better and faster random number generation.