diff --git a/depend b/depend
index 735afd8cc948c3..ea2486e9e8da1d 100644
--- a/depend
+++ b/depend
@@ -14598,7 +14598,6 @@ ruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_newline_list.h
 ruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_string.h
 ruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_strncasecmp.h
 ruby.$(OBJEXT): $(top_srcdir)/prism/util/pm_strpbrk.h
-ruby.$(OBJEXT): $(top_srcdir)/version.h
 ruby.$(OBJEXT): {$(VPATH)}assert.h
 ruby.$(OBJEXT): {$(VPATH)}atomic.h
 ruby.$(OBJEXT): {$(VPATH)}backward/2/assume.h
@@ -14782,7 +14781,6 @@ ruby.$(OBJEXT): {$(VPATH)}prism/ast.h
 ruby.$(OBJEXT): {$(VPATH)}prism/diagnostic.h
 ruby.$(OBJEXT): {$(VPATH)}prism/version.h
 ruby.$(OBJEXT): {$(VPATH)}prism_compile.h
-ruby.$(OBJEXT): {$(VPATH)}revision.h
 ruby.$(OBJEXT): {$(VPATH)}ruby.c
 ruby.$(OBJEXT): {$(VPATH)}ruby_assert.h
 ruby.$(OBJEXT): {$(VPATH)}ruby_atomic.h
diff --git a/doc/ruby/options.md b/doc/ruby/options.md
index 3ed36bf7ea6d7c..943b5f967bf86e 100644
--- a/doc/ruby/options.md
+++ b/doc/ruby/options.md
@@ -302,7 +302,7 @@ $ ruby -n -e 'p $_' desiderata.txt
 "be on good terms with all persons.\n"
 ```
 
-With option `-l' (chopped):
+With option `-l` (chopped):
 
 ```console
 $ ruby -ln -e 'p $_' desiderata.txt
diff --git a/gems/bundled_gems b/gems/bundled_gems
index 4c59614011428c..4fed6a994d8766 100644
--- a/gems/bundled_gems
+++ b/gems/bundled_gems
@@ -39,7 +39,7 @@ ostruct             0.6.3   https://github.com/ruby/ostruct
 pstore              0.2.0   https://github.com/ruby/pstore
 benchmark           0.4.1   https://github.com/ruby/benchmark
 logger              1.7.0   https://github.com/ruby/logger
-rdoc                6.14.2  https://github.com/ruby/rdoc f4a90c6010b2346cb5426d4496f5a37a136a82fb # for markdown
+rdoc                6.14.2  https://github.com/ruby/rdoc
 win32ole            1.9.2   https://github.com/ruby/win32ole
 irb                 1.15.2  https://github.com/ruby/irb 331c4e851296b115db766c291e8cf54a2492fb36
 reline              0.6.2   https://github.com/ruby/reline
diff --git a/lib/resolv.rb b/lib/resolv.rb
index e2255b7d11a70f..73410f1324b7b1 100644
--- a/lib/resolv.rb
+++ b/lib/resolv.rb
@@ -4,6 +4,7 @@
 require 'timeout'
 require 'io/wait'
 require 'securerandom'
+require 'rbconfig'
 
 # Resolv is a thread-aware DNS resolver library written in Ruby.  Resolv can
 # handle multiple DNS requests concurrently without blocking the entire Ruby
diff --git a/ruby.c b/ruby.c
index 134ac5ae3bf0bd..f400a3d53140b3 100644
--- a/ruby.c
+++ b/ruby.c
@@ -61,7 +61,6 @@
 #include "ruby/util.h"
 #include "ruby/version.h"
 #include "ruby/internal/error.h"
-#include "version.h"
 
 #define singlebit_only_p(x) !((x) & ((x)-1))
 STATIC_ASSERT(Qnil_1bit_from_Qfalse, singlebit_only_p(Qnil^Qfalse));
@@ -302,6 +301,8 @@ ruby_show_usage_line(const char *name, const char *secondary, const char *descri
                     description, help, highlight, width, columns);
 }
 
+RUBY_EXTERN const char ruby_api_version_name[];
+
 static void
 usage(const char *name, int help, int highlight, int columns)
 {
@@ -404,9 +405,9 @@ usage(const char *name, int help, int highlight, int columns)
     unsigned int w = (columns > 80 ? (columns - 79) / 2 : 0) + 16;
 #define SHOW(m) show_usage_line(&(m), help, highlight, w, columns)
 
-    printf("%sUsage:%s %s [options] [--] [filepath] [arguments]\n\n", sb, se, name);
-    printf("Details and examples at https://docs.ruby-lang.org/en/%s/ruby/options_md.html\n",
-           RUBY_PATCHLEVEL == -1 ? "master" : STRINGIZE(RUBY_VERSION_MAJOR) "." STRINGIZE(RUBY_VERSION_MINOR));
+    printf("%sUsage:%s %s [options] [--] [filepath] [arguments]\n", sb, se, name);
+    printf("\n""Details and examples at https://docs.ruby-lang.org/en/%s/ruby/options_md.html\n",
+           ruby_api_version_name);
 
     for (i = 0; i < num; ++i)
         SHOW(usage_msg[i]);
diff --git a/test/ruby/test_rubyoptions.rb b/test/ruby/test_rubyoptions.rb
index 4144191ec767c6..fe6ffde07c0cae 100644
--- a/test/ruby/test_rubyoptions.rb
+++ b/test/ruby/test_rubyoptions.rb
@@ -47,26 +47,27 @@ def test_source_file
     assert_in_out_err([], "", [], [])
   end
 
+  version = RUBY_PATCHLEVEL == -1 ? "master" : "#{RUBY_VERSION_MAJOR}.#{RUBY_VERSION_MINOR}"
+  OPTIONS_LINK = "https://docs.ruby-lang.org/en/#{version}/ruby/options_md.html"
+
   def test_usage
     assert_in_out_err(%w(-h)) do |r, e|
-      assert_operator(r.size, :<=, 26)
-      longer = r[3..-1].select {|x| x.size >= 80}
+      _, _, link, *r = r
+      assert_include(link, OPTIONS_LINK)
+      assert_operator(r.size, :<=, 24)
+      longer = r.select {|x| x.size >= 80}
       assert_equal([], longer)
       assert_equal([], e)
-
-      version = RUBY_PATCHLEVEL == -1 ? "master" : "#{RUBY_VERSION_MAJOR}.#{RUBY_VERSION_MINOR}"
-      assert_include(r, "Details and examples at https://docs.ruby-lang.org/en/#{version}/ruby/options_md.html")
     end
   end
 
   def test_usage_long
     assert_in_out_err(%w(--help)) do |r, e|
-      longer = r[3..-1].select {|x| x.size > 80}
+      _, _, link, *r = r
+      assert_include(link, OPTIONS_LINK)
+      longer = r.select {|x| x.size > 80}
       assert_equal([], longer)
       assert_equal([], e)
-
-      version = RUBY_PATCHLEVEL == -1 ? "master" : "#{RUBY_VERSION_MAJOR}.#{RUBY_VERSION_MINOR}"
-      assert_include(r, "Details and examples at https://docs.ruby-lang.org/en/#{version}/ruby/options_md.html")
     end
   end
 
diff --git a/tool/test-bundled-gems.rb b/tool/test-bundled-gems.rb
index 027ed647f10683..221779b130dab3 100644
--- a/tool/test-bundled-gems.rb
+++ b/tool/test-bundled-gems.rb
@@ -8,11 +8,15 @@
 
 github_actions = ENV["GITHUB_ACTIONS"] == "true"
 
+DEFAULT_ALLOWED_FAILURES = RUBY_PLATFORM =~ /mswin|mingw/ ? [
+  'rbs',
+  'debug',
+  'irb',
+  'power_assert',
+  'net-imap',
+] : []
 allowed_failures = ENV['TEST_BUNDLED_GEMS_ALLOW_FAILURES'] || ''
-if RUBY_PLATFORM =~ /mswin|mingw/
-  allowed_failures = [allowed_failures, "rbs,debug,irb,power_assert"].join(',')
-end
-allowed_failures = allowed_failures.split(',').uniq.reject(&:empty?)
+allowed_failures = allowed_failures.split(',').concat(DEFAULT_ALLOWED_FAILURES).uniq.reject(&:empty?)
 
 # make test-bundled-gems BUNDLED_GEMS=gem1,gem2,gem3
 bundled_gems = ARGV.first || ''
@@ -113,7 +117,7 @@
               "with exit code #{$?.exitstatus}")
     puts colorize.decorate(mesg, "fail")
     if allowed_failures.include?(gem)
-      mesg = "Ignoring test failures for #{gem} due to \$TEST_BUNDLED_GEMS_ALLOW_FAILURES"
+      mesg = "Ignoring test failures for #{gem} due to \$TEST_BUNDLED_GEMS_ALLOW_FAILURES or DEFAULT_ALLOWED_FAILURES"
       puts colorize.decorate(mesg, "skip")
     else
       failed << gem
diff --git a/version.c b/version.c
index bb6c15fb7a66a2..243f00b38c0e74 100644
--- a/version.c
+++ b/version.c
@@ -24,11 +24,13 @@
 
 #ifdef RUBY_REVISION
 # if RUBY_PATCHLEVEL == -1
+#  define RUBY_API_VERSION_NAME "master"
 #  ifndef RUBY_BRANCH_NAME
-#   define RUBY_BRANCH_NAME "master"
+#   define RUBY_BRANCH_NAME RUBY_API_VERSION_NAME
 #  endif
 #  define RUBY_REVISION_STR " "RUBY_BRANCH_NAME" "RUBY_REVISION
 # else
+#  define RUBY_API_VERSION_NAME RUBY_API_VERSION_STR
 #  define RUBY_REVISION_STR " revision "RUBY_REVISION
 # endif
 #else
@@ -44,6 +46,10 @@
 #define MKSTR(type) rb_obj_freeze(rb_usascii_str_new_static(ruby_##type, sizeof(ruby_##type)-1))
 #define MKINT(name) INT2FIX(ruby_##name)
 
+#define RUBY_API_VERSION_STR \
+    STRINGIZE(RUBY_API_VERSION_MAJOR) "." \
+    STRINGIZE(RUBY_API_VERSION_MINOR) "." \
+    ""
 const int ruby_api_version[] = {
     RUBY_API_VERSION_MAJOR,
     RUBY_API_VERSION_MINOR,
@@ -81,6 +87,7 @@ const char ruby_revision[] = RUBY_FULL_REVISION;
 const char ruby_release_date[] = RUBY_RELEASE_DATE;
 const char ruby_platform[] = RUBY_PLATFORM;
 const int ruby_patchlevel = RUBY_PATCHLEVEL;
+const char ruby_api_version_name[] = RUBY_API_VERSION_NAME;
 const char ruby_description[] =
     "ruby " RUBY_VERSION RUBY_PATCHLEVEL_STR " "
     "(" RUBY_RELEASE_DATETIME RUBY_REVISION_STR ") "