version.h File Reference

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Macros
The origin.
These information never change. Just written here to remember.
#define	RUBY_AUTHOR   "Yukihiro Matsumoto"
	Author of this project. More...
#define	RUBY_BIRTH_YEAR   1993
	Ruby's birth year. More...
#define	RUBY_BIRTH_MONTH   2
	Ruby's birth month. More...
#define	RUBY_BIRTH_DAY   24
	Ruby's birth day. More...
The API version.
API version is different from binary version. These numbers are for API stability. When you have distinct API versions x and y, you cannot expect codes targeted to x also works for y. However let us repeat here that it's a BAD idea to check RUBY_API_VERSION_CODE form extension libraries. Different API versions are just different. There is no such thing like upper compatibility.
#define	RUBY_API_VERSION_MAJOR   3
	Major version. More...
#define	RUBY_API_VERSION_MINOR   4
	Minor version. More...
#define	RUBY_API_VERSION_TEENY   0
	Teeny version. More...
#define	RUBY_API_VERSION_CODE   (RUBY_API_VERSION_MAJOR*10000+RUBY_API_VERSION_MINOR*100+RUBY_API_VERSION_TEENY)
	This macro is API versions encoded into a C integer. More...

Variables
Interfaces from extension libraries.
Before using these infos, think thrice whether they are really necessary or not, and if the answer was yes, think twice a week later again.
const int	ruby_api_version [3]
	API versions, in { major, minor, teeny } order. More...
const char	ruby_version []
	Stringised version. More...
const char	ruby_release_date []
	Date of release, in a C string. More...
const char	ruby_platform []
	Target platform identifier, in a C string. More...
const int	ruby_patchlevel
	This is a monotonic increasing integer that describes specific "patch" level. More...
const char	ruby_description []
	This is what ruby -v prints to the standard error. More...
const char	ruby_copyright []
	Copyright notice. More...
const char	ruby_engine []
	This is just "ruby" for us. More...

Detailed Description

Author

$Author$

Date

Wed May 13 12:56:56 JST 2009

Copyright

Copyright (C) 1993-2009 Yukihiro Matsumoto

Copyright (C) 2000 Network Applied Communication Laboratory, Inc.

Copyright (C) 2000 Information-technology Promotion Agency, Japan

This file is a part of the programming language Ruby. Permission is hereby granted, to either redistribute and/or modify this file, provided that the conditions mentioned in the file COPYING are met. Consult the file for details.

This file contains only

• never-changeable information, and
• interfaces accessible from extension libraries.

Never try to check RUBY_VERSION_CODE etc in extension libraries, check the features with mkmf.rb instead.

Definition in file version.h.

Macro Definition Documentation

RUBY_API_VERSION_CODE

#define RUBY_API_VERSION_CODE   (RUBY_API_VERSION_MAJOR*10000+RUBY_API_VERSION_MINOR*100+RUBY_API_VERSION_TEENY)

This macro is API versions encoded into a C integer.

Note

Use mkmf.

Don't rely on it.

Definition at line 84 of file version.h.

RUBY_API_VERSION_MAJOR

#define RUBY_API_VERSION_MAJOR   3

Major version.

This digit changes sometimes for various reasons, but that doesn't mean a total rewrite. Practically when it comes to API versioning, major and minor version changes are equally catastrophic.

Definition at line 64 of file version.h.

RUBY_API_VERSION_MINOR

#define RUBY_API_VERSION_MINOR   4

Minor version.

As of writing this version changes annually. Greater version doesn't mean "better"; they just mean years passed.

Definition at line 70 of file version.h.

RUBY_API_VERSION_TEENY

#define RUBY_API_VERSION_TEENY   0

Teeny version.

This digit is kind of reserved these days. Kept 0 for the entire 2.x era. Waiting for future uses.

Definition at line 76 of file version.h.

RUBY_AUTHOR

#define RUBY_AUTHOR   "Yukihiro Matsumoto"

Author of this project.

Definition at line 32 of file version.h.

RUBY_BIRTH_DAY

#define RUBY_BIRTH_DAY   24

Ruby's birth day.

Definition at line 41 of file version.h.

RUBY_BIRTH_MONTH

#define RUBY_BIRTH_MONTH   2

Ruby's birth month.

Definition at line 38 of file version.h.

RUBY_BIRTH_YEAR

#define RUBY_BIRTH_YEAR   1993

Ruby's birth year.

Definition at line 35 of file version.h.

Variable Documentation

ruby_api_version

const int ruby_api_version[3]

extern

API versions, in { major, minor, teeny } order.

Definition at line 48 of file version.c.

ruby_copyright

const char ruby_copyright[]

extern

Copyright notice.

Definition at line 82 of file version.c.

ruby_description

const char ruby_description[]

extern

This is what ruby -v prints to the standard error.

Something like: "ruby 2.5.9p229 (2021-04-05 revision 67829) [x86_64-linux]". This doesn't include runtime options like a JIT being enabled.

Definition at line 75 of file version.c.

ruby_engine

const char ruby_engine[]

extern

This is just "ruby" for us.

But different implementations can have different strings here.

Definition at line 85 of file version.c.

Referenced by ruby_process_options().

ruby_patchlevel

const int ruby_patchlevel

extern

This is a monotonic increasing integer that describes specific "patch" level.

You can know the exact changeset your binary is running by this info (and ruby_version), unless this is -1. -1 means there is no release yet for the version; ruby is actively developed. 0 means the initial GA version.

Definition at line 74 of file version.c.

ruby_platform

const char ruby_platform[]

extern

Target platform identifier, in a C string.

Note

Seasoned UNIX programmers should beware that this "platform identifier" is our invention; not always identical to so-called target triplets that GNU systems use. For instance on @shyouhei's machine, ruby_platform is "x64_64-linux" while its target triplet is x86_64-pc-linux-gnu.

Note also that we support Windows.

Definition at line 73 of file version.c.

ruby_release_date

const char ruby_release_date[]

extern

Date of release, in a C string.

Definition at line 72 of file version.c.

ruby_version

const char ruby_version[]

extern

Stringised version.

Note

This is the runtime version, not the API version. For instance it was "2.5.9" when ruby_api_version was { 2, 5, 0 }.

Definition at line 70 of file version.c.