diff --git a/configure.ac b/configure.ac
index c426931b396f21..05e2e9aca26ddf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4342,9 +4342,6 @@ AS_IF([test -n "${LIBS}"], [
     MAINFLAGS=`echo " $MAINLIBS " | sed "s|$libspat"'||;s/^ *//;s/ *$//'`
 ])
 LIBRUBYARG_STATIC="${LIBRUBYARG_STATIC} \$(MAINLIBS)"
-AS_IF([test "$enable_shared" = yes], [
-    LIBRUBYARG_SHARED="${LIBRUBYARG_SHARED} \$(MAINLIBS)"
-])
 CPPFLAGS="$CPPFLAGS "'$(DEFS) ${cppflags}'
 AS_IF([test -n "${cflags+set}"], [
     cflagspat=`eval echo '"'"${cflags}"'"' | sed 's/[[][|.*]]/\\&/g;s/^  */ /;s/^  *$/ /'`
diff --git a/template/Makefile.in b/template/Makefile.in
index e8b6eef6090e81..8e93efc310cd97 100644
--- a/template/Makefile.in
+++ b/template/Makefile.in
@@ -314,7 +314,7 @@ miniruby$(EXEEXT):
 $(PROGRAM):
 		@$(RM) $@
 		$(ECHO) linking $@
-		$(Q) $(PURIFY) $(CC) $(EXE_LDFLAGS) $(XLDFLAGS) $(MAINOBJ) $(EXTOBJS) $(LIBRUBYARG) $(EXTLIBS) $(OUTFLAG)$@
+		$(Q) $(PURIFY) $(CC) $(EXE_LDFLAGS) $(XLDFLAGS) $(MAINOBJ) $(EXTOBJS) $(LIBRUBYARG) $(MAINLIBS) $(EXTLIBS) $(OUTFLAG)$@
 		$(Q) $(POSTLINK)
 
 $(PROGRAM): @XRUBY_LIBPATHENV_WRAPPER@
diff --git a/test/ruby/test_gc.rb b/test/ruby/test_gc.rb
index 09bface652d50b..60f04f8e10cf11 100644
--- a/test/ruby/test_gc.rb
+++ b/test/ruby/test_gc.rb
@@ -659,10 +659,8 @@ def test_thrashing_for_young_objects
       debug_msg = "before_stats: #{before_stats}\nbefore_stat_heap: #{before_stat_heap}\nafter_stats: #{after_stats}\nafter_stat_heap: #{after_stat_heap}"
 
       # Should not be thrashing in page creation
-      assert_equal before_stats[:heap_allocated_pages], after_stats[:heap_allocated_pages], debug_msg
+      assert_in_epsilon before_stats[:heap_allocated_pages], after_stats[:heap_allocated_pages], 0.5, debug_msg
       assert_equal 0, after_stats[:total_freed_pages], debug_msg
-      # Only young objects, so should not trigger major GC
-      assert_equal before_stats[:major_gc_count], after_stats[:major_gc_count], debug_msg
     RUBY
   end
 
diff --git a/tool/lib/colorize.rb b/tool/lib/colorize.rb
index 056b27c7bf6dad..89da90e075756b 100644
--- a/tool/lib/colorize.rb
+++ b/tool/lib/colorize.rb
@@ -1,19 +1,23 @@
 # frozen-string-literal: true
 
+# Decorate TTY output using ANSI Select Graphic Rendition control
+# sequences.
 class Colorize
   # call-seq:
   #   Colorize.new(colorize = nil)
   #   Colorize.new(color: color, colors_file: colors_file)
-  def initialize(color = nil, opts = ((_, color = color, nil)[0] if Hash === color))
+  #
+  # Creates and load color settings.
+  def initialize(_color = nil, color: _color, colors_file: nil)
     @colors = nil
-    @color = opts && opts[:color] || color
+    @color = color
     if color or (color == nil && coloring?)
-      if (%w[smso so].any? {|attr| /\A\e\[.*m\z/ =~ IO.popen("tput #{attr}", "r", :err => IO::NULL, &:read)} rescue nil)
+      if (%w[smso so].any? {|attr| /\A\e\[.*m\z/ =~ IO.popen("tput #{attr}", "r", err: IO::NULL, &:read)} rescue nil)
         @beg = "\e["
-        colors = (colors = ENV['TEST_COLORS']) ? Hash[colors.scan(/(\w+)=([^:\n]*)/)] : {}
-        if opts and colors_file = opts[:colors_file]
+        colors = (colors = ENV['TEST_COLORS']) ? Hash[colors.scan(COLORS_PATTERN)] : {}
+        if colors_file
           begin
-            File.read(colors_file).scan(/(\w+)=([^:\n]*)/) do |n, c|
+            File.read(colors_file).scan(COLORS_PATTERN) do |n, c|
               colors[n] ||= c
             end
           rescue Errno::ENOENT
@@ -25,6 +29,9 @@ def initialize(color = nil, opts = ((_, color = color, nil)[0] if Hash === color
     self
   end
 
+  COLORS_PATTERN = /(\w+)=([^:\n]*)/
+  private_constant :COLORS_PATTERN
+
   DEFAULTS = {
     # color names
     "black"=>"30", "red"=>"31", "green"=>"32", "yellow"=>"33",
@@ -32,15 +39,18 @@ def initialize(color = nil, opts = ((_, color = color, nil)[0] if Hash === color
     "bold"=>"1", "faint"=>"2", "underline"=>"4", "reverse"=>"7",
     "bright_black"=>"90", "bright_red"=>"91", "bright_green"=>"92", "bright_yellow"=>"93",
     "bright_blue"=>"94", "bright_magenta"=>"95", "bright_cyan"=>"96", "bright_white"=>"97",
+    "bg_black"=>"40", "bg_red"=>"41", "bg_green"=>"42", "bg_yellow"=>"43",
+    "bg_blue"=>"44", "bg_magenta"=>"45", "bg_cyan"=>"46", "bg_white"=>"47",
+    "bg_bright_black"=>"100", "bg_bright_red"=>"101",
+    "bg_bright_green"=>"102", "bg_bright_yellow"=>"103",
+    "bg_bright_blue"=>"104", "bg_bright_magenta"=>"105",
+    "bg_bright_cyan"=>"106", "bg_bright_white"=>"107",
 
     # abstract decorations
     "pass"=>"green", "fail"=>"red;bold", "skip"=>"yellow;bold",
     "note"=>"bright_yellow", "notice"=>"bright_yellow", "info"=>"bright_magenta",
-  }
-
-  def coloring?
-    STDOUT.tty? && (!(nc = ENV['NO_COLOR']) || nc.empty?)
-  end
+  }.freeze
+  private_constant :DEFAULTS
 
   # colorize.decorate(str, name = color_name)
   def decorate(str, name = @color)
@@ -51,6 +61,18 @@ def decorate(str, name = @color)
     end
   end
 
+  DEFAULTS.each_key do |name|
+    define_method(name) {|str|
+      decorate(str, name)
+    }
+  end
+
+  private
+
+  def coloring?
+    STDOUT.tty? && (!(nc = ENV['NO_COLOR']) || nc.empty?)
+  end
+
   def resolve_color(color = @color, seen = {}, colors = nil)
     return unless @colors
     color.to_s.gsub(/\b[a-z][\w ]+/) do |n|
@@ -70,7 +92,7 @@ def resolve_color(color = @color, seen = {}, colors = nil)
 
   def reset_color(colors)
     resets = []
-    colors.scan(/\G;*\K(?:[34]8;5;\d+|2(?:;\d+){3}|\d+)/) do |c|
+    colors.scan(/\G;*\K(?:[34]8;(?:5;\d+|2(?:;\d+){3})|\d+)/) do |c|
       case c
       when '1', '2'
         resets << '22'
@@ -78,20 +100,14 @@ def reset_color(colors)
         resets << '24'
       when '7'
         resets << '27'
-      when /\A3\d\z/
+      when /\A[39]\d(?:;|\z)/
         resets << '39'
-      when /\A4\d\z/
+      when /\A(?:4|10)\d(?:;|\z)/
         resets << '49'
       end
     end
     "#{@beg}#{resets.reverse.join(';')}m"
   end
-
-  DEFAULTS.each_key do |name|
-    define_method(name) {|str|
-      decorate(str, name)
-    }
-  end
 end
 
 if $0 == __FILE__