rbconfig.rb: use program version

* common.mk, tool/mkconfig.rb: check the running ruby version in
  rbconfig.rb with the program version, as RUBY_VERSION has never
  been affected by --with-ruby-version option.
  [ruby-core:68639] [Bug #11002]
* configure.in (LIBRUBY_DLDFLAGS): compatibility_version must be
  valid version numbers, not an arbitrary string.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50152 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/tool/mkconfig.rb b/tool/mkconfig.rb
index fc91ddec3f..b37241df61 100755
--- a/tool/mkconfig.rb
+++ b/tool/mkconfig.rb
@@ -136,7 +136,7 @@ File.foreach "config.status" do |line|
       v_others << v
     end
     case name
-    when "ruby_version"
+    when "RUBY_PROGRAM_VERSION"
       version = val[/\A"(.*)"\z/, 1]
     end
   end