https://git.ruby-lang.org/ruby.git/commit/?id=1d2ec4b216

From 1d2ec4b21647089598d0be3a8bc5f56a71b5e892 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Wed, 10 Jul 2019 12:33:29 +0900
Subject: Added Etc::VERSION


diff --git a/ext/etc/etc.c b/ext/etc/etc.c
index 93b19f1..b6dca94 100644
--- a/ext/etc/etc.c
+++ b/ext/etc/etc.c
@@ -52,6 +52,8 @@ char *getenv(); https://github.com/ruby/ruby/blob/trunk/ext/etc/etc.c#L52
 #endif
 char *getlogin();
 
+#define RUBY_ETC_VERSION "1.0.1"
+
 #include "constdefs.h"
 
 /* call-seq:
@@ -1062,6 +1064,7 @@ Init_etc(void) https://github.com/ruby/ruby/blob/trunk/ext/etc/etc.c#L1064
     VALUE mEtc;
 
     mEtc = rb_define_module("Etc");
+    rb_define_const(mEtc, "VERSION", rb_str_new_cstr(RUBY_ETC_VERSION));
     init_constants(mEtc);
 
     rb_define_module_function(mEtc, "getlogin", etc_getlogin, 0);
diff --git a/ext/etc/etc.gemspec b/ext/etc/etc.gemspec
index f3ec4af..f280169 100644
--- a/ext/etc/etc.gemspec
+++ b/ext/etc/etc.gemspec
@@ -1,8 +1,19 @@ https://github.com/ruby/ruby/blob/trunk/ext/etc/etc.gemspec#L1
 # frozen_string_literal: true
 
+version = ["", "ext/etc/"].find do |dir|
+  begin
+    break File.open(File.expand_path("../#{dir}/etc.c", __FILE__)) do |f|
+      f.gets "\n#define RUBY_ETC_VERSION "
+      f.gets[/"(.+)"/, 1]
+    end
+  rescue
+    next
+  end
+end
+
 Gem::Specification.new do |spec|
   spec.name          = "etc"
-  spec.version       = "1.0.1"
+  spec.version       = version
   spec.authors       = ["Yukihiro Matsumoto"]
   spec.email         = ["matz@r..."]
 
-- 
cgit v0.10.2


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