KOBAYASHI Shuji
81c2108819
* In explanation of mruby, the expression `build_config.rb` is frequently
used including official documents, so I think that it will not make sense
if the file is no longer used.
* The `MRUBY_TARGET` mechanism seems to have little improvement, so I don't
think it should be changed to avoid unnecessary confusion.
* `MRUBY_TARGET` and `MRuby.targets` represent somewhat different things,
so using the same term "target" is a bit confusing.
The mechanism that can be written short when using a file under
`build_config` (renamed from `target`) directory remains
(`build_config/${MRUBY_CONFIG}.rb` is used if the path specified
in `MRUBY_CONFIG` doesn't exist).
2.4 KiB
User visible changes in mruby3
Build System
presym target
The first compilation of mruby may require generation of a
static symbol table named build/presym. You can generate
the table by rake gensym.
build_config directory
Typical build configuration files are located in build_config
directory. For examples:
host-gprof: compiles withgproffor performance tuninghost-m32: compiles in gcc 32bit mode on 64bit platformsboxing: compiles all three boxing optionsclang-asan: compiles withclang's Address Sanitizer
build_config/${MRUBY_CONFIG}.rb is used if the path specified
in MRUBY_CONFIG doesn't exist, so you can specify it as
rake MRUBY_CONFIG=boxing.
Build Configuration Contribution
When you write a new build configuration description, please contribute. We welcome your contribution as a GitHub pull-request.
Language Changes
New Syntax
We have ported some new syntax from CRuby.
- R-assignment (
12 => x) - Numbered block parameter (
x.map{_1 * 2}) - End-less
def(def double(x) = x*2)
Configuration Options Changed
Some configuration macro names are changed for consistency
MRB_NO_FLOAT
Changed from MRB_WITHOUT_FLOAT to conform USE_XXX naming
convention.
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_NO_BOXING
Uses struct to represent mrb_value. Consumes more memory
but easier to inveticate the internal and to debug. It used
to be default mrb_value representation. Now the default is
MRB_WORD_BOXING.
MRB_WORD_BOXING
Pack mrb_value in an intptr_t integer. Consumes less
memory compared to MRB_NO_BOXING especially on 32 bit
platforms. Fixnum size is 31 bits so some integer values
does not fit in Fixnum integers.
MRB_NAN_BOXING
Pack mrb_value in a floating pointer number. Nothing
changed from previous versions.
MRB_USE_MALLOC_TRIM
Call malloc_trim(0) from mrb_full_gc() if this macro is defined.
If you are using glibc malloc, this macro could reduce memory consumption.
Internal Changes
Random now use xoshiro128++.
For better and faster random number generation.