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[DOC] Refine/fix doc/contributing/building_ruby.md [ci skip]

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* Separate dependencies for RubyGems
* Add reasons of optional libraries
* Add a note for gperf and fix the required version
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Nobuyoshi Nakada 2023-02-08 20:11:40 +09:00
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doc/contributing/building_ruby.md
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@ -5,6 +5,9 @@
1. Install the prerequisite dependencies for building the CRuby interpreter:
* C compiler
For RubyGems, you will also need:
* OpenSSL 1.1.x or 3.0.x / LibreSSL
* libyaml 0.1.7 or later
* zlib
@ -13,14 +16,15 @@
* autoconf - 2.67 or later
* bison - 3.0 or later
* gperf - 3.0.3 or later
* gperf - 3.1 or later
* Usually unneeded; only if you edit some source files using gperf
* ruby - 2.2 or later
* We can upgrade this version to system ruby version of the latest Ubuntu LTS.
2. Install optional, recommended dependencies:
* readline/editline (libedit)
* libffi
* readline/editline (libedit, to build readline)
* libffi (to build fiddle)
* gmp (if you with to accelerate Bignum operations)
* libexecinfo (FreeBSD)
* rustc - 1.58.0 or later (if you wish to build [YJIT](/doc/yjit/yjit.md))