1 files changed, 259 insertions, 238 deletions

diff --git a/ext/extmk.rb b/ext/extmk.rb
index 86174830b3..f5244f72c8 100755
--- a/ext/extmk.rb
+++ b/ext/extmk.rb
@@ -2,53 +2,55 @@
 # -*- mode: ruby; coding: us-ascii -*-
 # frozen_string_literal: false
 
+module Gem
+  # Used by Gem::Platform.local
+  def self.target_rbconfig
+    RbConfig::CONFIG
+  end
+end
+
 # :stopdoc:
 $extension = nil
 $extstatic = nil
 $force_static = nil
-$install = nil
 $destdir = nil
 $dryrun = false
-$clean = nil
 $nodynamic = nil
-$extinit = nil
 $extobjs = []
 $extflags = ""
 $extlibs = nil
 $extpath = nil
-$ignore = nil
 $message = nil
 $command_output = nil
-$configure_only = false
+$subconfigure = false
 
 $progname = $0
 alias $PROGRAM_NAME $0
 alias $0 $progname
 
 $extlist = []
-$compiled = {}
 
 DUMMY_SIGNATURE = "***DUMMY MAKEFILE***"
 
 srcdir = File.dirname(File.dirname(__FILE__))
 unless defined?(CROSS_COMPILING) and CROSS_COMPILING
-  $:.replace([File.expand_path("lib", srcdir), Dir.pwd])
+  $:.replace([Dir.pwd, File.expand_path("lib", srcdir)])
 end
-$:.unshift(srcdir)
 require 'rbconfig'
 
+# only needs Gem::Platform
+require 'rubygems/platform'
+
 $topdir = "."
 $top_srcdir = srcdir
+$extmk = true
+inplace = File.identical?($top_srcdir, $topdir)
 
 $" << "mkmf.rb"
 load File.expand_path("lib/mkmf.rb", srcdir)
 require 'optparse/shellwords'
 
-if defined?(File::NULL)
-  @null = File::NULL
-elsif !File.chardev?(@null = "/dev/null")
-  @null = "nul"
-end
+@null = File::NULL
 
 def verbose?
   $mflags.defined?("V") == "1"
@@ -67,12 +69,17 @@ end
 
 def atomic_write_open(filename)
   filename_new = filename + ".new.#$$"
-  open(filename_new, "wb") do |f|
+  clean = false
+  File.open(filename_new, "wbx") do |f|
+    clean = true
     yield f
   end
   if File.binread(filename_new) != (File.binread(filename) rescue nil)
     File.rename(filename_new, filename)
-  else
+    clean = false
+  end
+ensure
+  if clean
     File.unlink(filename_new)
   end
 end
@@ -104,10 +111,10 @@ def extract_makefile(makefile, keep = true)
     end
     return false
   end
-  srcs = Dir[File.join($srcdir, "*.{#{SRC_EXT.join(%q{,})}}")].map {|fn| File.basename(fn)}.sort
+  srcs = Dir[*SRC_EXT.map {|e| "*.#{e}"}, base: $srcdir].map {|fn| File.basename(fn)}.sort
   if !srcs.empty?
     old_srcs = m[/^ORIG_SRCS[ \t]*=[ \t](.*)/, 1] or return false
-    old_srcs.split.sort == srcs or return false
+    (old_srcs.split - srcs).empty? or return false
   end
   $target = target
   $extconf_h = m[/^RUBY_EXTCONF_H[ \t]*=[ \t]*(\S+)/, 1]
@@ -132,12 +139,7 @@ def extract_makefile(makefile, keep = true)
   true
 end
 
-def extmake(target, basedir = (maybestatic = 'ext'))
-  unless $configure_only || verbose?
-    print "#{$message} #{target}\n"
-    $stdout.flush
-  end
-
+def extmake(target, basedir = 'ext', maybestatic = true)
   FileUtils.mkpath target unless File.directory?(target)
   begin
     # don't build if parent library isn't build
@@ -145,7 +147,7 @@ def extmake(target, basedir = (maybestatic = 'ext'))
     d = target
     until (d = File.dirname(d)) == '.'
       if File.exist?("#{$top_srcdir}/#{basedir}/#{d}/extconf.rb")
-        parent = (/^all:\s*install/ =~ IO.read("#{d}/Makefile") rescue false)
+        parent = (/^all:\s*install/ =~ File.read("#{d}/Makefile") rescue false)
         break
       end
     end
@@ -156,7 +158,7 @@ def extmake(target, basedir = (maybestatic = 'ext'))
     top_srcdir = $top_srcdir
     topdir = $topdir
     hdrdir = $hdrdir
-    prefix = "../" * (target.count("/")+1)
+    prefix = "../" * (basedir.count("/")+target.count("/")+1)
     $top_srcdir = relative_from(top_srcdir, prefix)
     $hdrdir = relative_from(hdrdir, prefix)
     $topdir = prefix + $topdir
@@ -164,15 +166,12 @@ def extmake(target, basedir = (maybestatic = 'ext'))
     $mdir = target
     $srcdir = File.join($top_srcdir, basedir, $mdir)
     $preload = nil
-    $objs = []
-    $srcs = []
     $extso = []
-    $compiled[target] = false
     makefile = "./Makefile"
     static = $static
     $static = nil if noinstall = File.fnmatch?("-*", target)
     ok = parent && File.exist?(makefile)
-    if parent && !$ignore
+    if parent
       rbconfig0 = RbConfig::CONFIG
       mkconfig0 = CONFIG
       rbconfig = {
@@ -200,7 +199,7 @@ def extmake(target, basedir = (maybestatic = 'ext'))
       begin
 	$extconf_h = nil
 	ok &&= extract_makefile(makefile)
-	old_objs = $objs
+	old_objs = $objs || []
 	old_cleanfiles = $distcleanfiles | $cleanfiles
 	conf = ["#{$srcdir}/makefile.rb", "#{$srcdir}/extconf.rb"].find {|f| File.exist?(f)}
 	if (!ok || ($extconf_h && !File.exist?($extconf_h)) ||
@@ -208,14 +207,12 @@ def extmake(target, basedir = (maybestatic = 'ext'))
 	    [conf, "#{$srcdir}/depend"].any? {|f| modified?(f, [t])})
         then
 	  ok = false
-          if $configure_only
-            if verbose?
-              print "#{conf}\n" if conf
-            else
-              print "#{$message} #{target}\n"
-            end
-            $stdout.flush
+          if verbose?
+            print "#{conf}\n" if conf
+          else
+            print "#{$message} #{target}\n"
           end
+          $stdout.flush
           init_mkmf
 	  Logging::logfile 'mkmf.log'
 	  rm_f makefile
@@ -235,7 +232,6 @@ def extmake(target, basedir = (maybestatic = 'ext'))
       rescue SystemExit
 	# ignore
       rescue => error
-        lineno = error.backtrace_locations[0].lineno
         ok = false
       ensure
 	rm_f "conftest*"
@@ -251,39 +247,29 @@ def extmake(target, basedir = (maybestatic = 'ext'))
 
       return true if !error and target.start_with?("-")
 
-      if parent
-        message = "Failed to configure #{target}. It will not be installed."
-      else
-        message = "Skipped to configure #{target}. Its parent is not configured."
-      end
-      if Logging.log_opened?
-        Logging::message(error.to_s) if error
-        Logging::message(message)
+      message = nil
+      if error
+        loc = error.backtrace_locations[0]
+        message = "#{loc.absolute_path}:#{loc.lineno}: #{error.message}"
+        if Logging.log_opened?
+          Logging::message("#{message}\n\t#{error.backtrace.join("\n\t")}\n")
+        end
       end
-      message = error.message if error
 
-      return parent ? [conf, lineno||0, message] : true
+      return [parent, message]
     end
     args = $mflags
     unless $destdir.to_s.empty? or $mflags.defined?("DESTDIR")
       args += ["DESTDIR=" + relative_from($destdir, "../"+prefix)]
     end
+    $objs ||= []
+    $srcs ||= []
     if $static and ok and !$objs.empty? and !noinstall
-      args += ["static"] unless $clean
+      args += ["static"]
       $extlist.push [(maybestatic ? $static : false), target, $target, $preload]
     end
     FileUtils.rm_f(old_cleanfiles - $distcleanfiles - $cleanfiles)
     FileUtils.rm_f(old_objs - $objs)
-    unless $configure_only or system($make, *args)
-      $ignore or $continue or return false
-    end
-    $compiled[target] = true
-    if $clean
-      FileUtils.rm_f("mkmf.log")
-      if $clean != true
-	FileUtils.rm_f([makefile, $extconf_h || "extconf.h"])
-      end
-    end
     if $static
       $extflags ||= ""
       $extlibs ||= []
@@ -325,10 +311,6 @@ def extmake(target, basedir = (maybestatic = 'ext'))
   true
 end
 
-def compiled?(target)
-  $compiled[target]
-end
-
 def parse_args()
   $mflags = []
   $makeflags = [] # for make command to build ruby, so quoted
@@ -383,6 +365,7 @@ def parse_args()
     $optparser.warn(e)
     abort $optparser.to_s
   end
+  $command_output or abort "--command-output option is mandatory"
 
   $destdir ||= ''
 
@@ -418,18 +401,10 @@ parse_args()
 if target = ARGV.shift and /^[a-z-]+$/ =~ target
   $mflags.push(target)
   case target
-  when /^(dist|real)?(clean)$/
-    target = $2
-    $ignore ||= true
-    $clean = $1 ? $1[0] : true
-  when /^install\b/
-    $install = true
-    $ignore ||= true
-    $mflags.unshift("INSTALL_PROG=install -c -p -m 0755",
-                    "INSTALL_DATA=install -c -p -m 0644",
-                    "MAKEDIRS=mkdir -p") if $dryrun
+  when /^(dist|real)?(clean)$/, /^install\b/
+    abort "#{target} is obsolete"
   when /configure/
-    $configure_only = true
+    $subconfigure = !ARGV.empty?
   end
 end
 unless $message
@@ -445,16 +420,22 @@ if CROSS_COMPILING
   $ruby = $mflags.defined?("MINIRUBY") || CONFIG['MINIRUBY']
 elsif sep = config_string('BUILD_FILE_SEPARATOR')
   $ruby = "$(topdir:/=#{sep})#{sep}miniruby" + EXEEXT
-else
+elsif CONFIG['EXTSTATIC']
   $ruby = '$(topdir)/miniruby' + EXEEXT
+else
+  $ruby = '$(topdir)/ruby' + EXEEXT
 end
-$ruby << " -I'$(topdir)'"
+$ruby = [$ruby]
+$ruby << "-I'$(topdir)'"
 unless CROSS_COMPILING
-  $ruby << " -I'$(top_srcdir)/lib'"
-  $ruby << " -I'$(extout)/$(arch)' -I'$(extout)/common'" if $extout
+  $ruby << "-I'$(top_srcdir)/lib'"
+  $ruby << "-I'$(extout)/$(arch)'" << "-I'$(extout)/common'" if $extout
   ENV["RUBYLIB"] = "-"
 end
+topruby = $ruby
+$ruby = topruby.join(' ')
 $mflags << "ruby=#$ruby"
+$builtruby = '$(topdir)/miniruby' + EXEEXT # Must be an executable path
 
 MTIMES = [__FILE__, 'rbconfig.rb', srcdir+'/lib/mkmf.rb'].collect {|f| File.mtime(f)}
 
@@ -469,9 +450,8 @@ if $extstatic
 end
 for dir in ["ext", File::join($top_srcdir, "ext")]
   setup = File::join(dir, CONFIG['setup'])
-  if File.file? setup
-    f = open(setup)
-    while line = f.gets()
+  if (f = File.stat(setup) and f.file? rescue next)
+    File.foreach(setup) do |line|
       line.chomp!
       line.sub!(/#.*$/, '')
       next if /^\s*$/ =~ line
@@ -488,13 +468,24 @@ for dir in ["ext", File::join($top_srcdir, "ext")]
     end
     MTIMES << f.mtime
     $setup = setup
-    f.close
     break
   end
 end unless $extstatic
 
-ext_prefix = "#{$top_srcdir}/ext"
-exts = $static_ext.sort_by {|t, i| i}.collect {|t, i| t}
+@gemname = nil
+if exts = ARGV.shift
+  ext_prefix = exts[%r[\A(?>\.bundle/)?[^/]+(?:/(?=(.+)?)|\z)]]
+  exts = $1
+  $extension = [exts] if exts
+  if ext_prefix.start_with?('.')
+    @gemname = exts
+    exts = []
+  else
+    exts &&= $static_ext.select {|t, *| File.fnmatch(t, exts)}
+  end
+end
+ext_prefix ||= 'ext'
+exts = (exts || $static_ext).sort_by {|t, i| i}.collect {|t, i| t}
 default_exclude_exts =
   case
   when $cygwin
@@ -504,122 +495,170 @@ default_exclude_exts =
   else
     %w'*win32*'
   end
+mandatory_exts = {}
 withes, withouts = [["--with", nil], ["--without", default_exclude_exts]].collect {|w, d|
   if !(w = %w[-extensions -ext].collect {|o|arg_config(w+o)}).any?
-    d ? proc {|c1| d.any?(&c1)} : proc {true}
+    d ? proc {|&c1| d.any?(&c1)} : proc {true}
   elsif (w = w.grep(String)).empty?
     proc {true}
   else
     w = w.collect {|o| o.split(/,/)}.flatten
-    w.collect! {|o| o == '+' ? d : o}.flatten! if d
-    proc {|c1| w.any?(&c1)}
+    w.collect! {|o| o == '+' ? d : o}.flatten!
+    proc {|&c1| w.any?(&c1)}
   end
 }
 cond = proc {|ext, *|
-  cond1 = proc {|n| File.fnmatch(n, ext)}
-  withes.call(cond1) and !withouts.call(cond1)
+  withes.call {|n| !n or (mandatory_exts[ext] = true if File.fnmatch(n, ext))} and
+    !withouts.call {|n| File.fnmatch(n, ext)}
 }
 ($extension || %w[*]).each do |e|
   e = e.sub(/\A(?:\.\/)+/, '')
-  exts |= Dir.glob("#{ext_prefix}/#{e}/**/extconf.rb").collect {|d|
-    d = File.dirname(d)
-    d.slice!(0, ext_prefix.length + 1)
-    d
-  }.find_all {|ext|
+  incl, excl = Dir.glob("#{e}/**/extconf.rb", base: "#$top_srcdir/#{ext_prefix}").collect {|d|
+    File.dirname(d)
+  }.partition {|ext|
+    if @gemname
+      ext = ext[%r[\A[^/]+]] # extract gem name
+      Dir.glob("*.gemspec", base: "#$top_srcdir/#{ext_prefix}/#{ext}") do |g|
+        break ext = g if ext.start_with?("#{g.chomp!(".gemspec")}-")
+      end
+    end
     with_config(ext, &cond)
-  }.sort
+  }
+  incl.sort!
+  excl.sort!.collect! {|d| d+"/"}
+  nil while incl.reject! {|d| excl << d+"/" if excl.any? {|x| d.start_with?(x)}}
+  exts |= incl
   if $LIBRUBYARG_SHARED.empty? and CONFIG["EXTSTATIC"] == "static"
     exts.delete_if {|d| File.fnmatch?("-*", d)}
   end
 end
+ext_prefix.chomp!("/")
 
-if $extout
-  extout = RbConfig.expand("#{$extout}", RbConfig::CONFIG.merge("topdir"=>$topdir))
-  unless $ignore
-    FileUtils.mkpath("#{extout}/gems")
-  end
-end
-
-FileUtils.makedirs('gems')
-ext_prefix = "#$top_srcdir/gems"
-gems = Dir.glob(File.join(ext_prefix, ($extension || ''), '**/extconf.rb')).collect {|d|
-  d = File.dirname(d)
-  d.slice!(0, ext_prefix.length + 1)
-  d
-}.find_all {|ext|
-  with_config(ext, &cond)
-}.sort
-
+@ext_prefix = ext_prefix
+@inplace = inplace
 extend Module.new {
+
   def timestamp_file(name, target_prefix = nil)
-    super.sub(%r[/\.extout\.(?:-\.)?], '/.')
+    if @gemname and name == '$(TARGET_SO_DIR)'
+      gem = true
+      name = "$(gem_platform)/$(ruby_version)/gems/#{@gemname}#{target_prefix}"
+    end
+    path = super.sub(%r[/\.extout\.(?:-\.)?], '/.')
+    if gem
+      nil while path.sub!(%r[/\.(gem_platform|ruby_version)\.-(?=\.)], '/$(\1)/')
+    end
+    path
   end
 
   def configuration(srcdir)
     super << "EXTSO #{['=', $extso].join(' ')}\n"
   end
-}
-
-dir = Dir.pwd
-FileUtils::makedirs('ext')
-Dir::chdir('ext')
-
-hdrdir = $hdrdir
-$hdrdir = ($top_srcdir = relative_from(srcdir, $topdir = "..")) + "/include"
-extso = []
-fails = []
-exts.each do |d|
-  $static = $force_static ? true : $static_ext[d]
-
-  if $ignore or !$nodynamic or $static
-    result = extmake(d) or abort
-    extso |= $extso
-    fails << result unless result == true
-  end
-end
-
-Dir.chdir('..')
-FileUtils::makedirs('gems')
-Dir.chdir('gems')
-extout = $extout
-unless gems.empty?
-  def self.timestamp_file(name, target_prefix = nil)
-    name = "$(arch)/gems/#{@gemname}#{target_prefix}" if name == '$(TARGET_SO_DIR)'
-    super
-  end
 
-  def self.create_makefile(*args, &block)
+  def create_makefile(*args, &block)
+    unless @gemname
+      if $static and (target = args.first).include?("/")
+        base = File.basename(target)
+        $defs << "-DInit_#{base}=Init_#{target.tr('/', '_')}"
+        $defs << "-DInitVM_#{base}=InitVM_#{target.tr('/', '_')}"
+      end
+      return super
+    end
     super(*args) do |conf|
       conf.find do |s|
+        s.sub!(%r(^(srcdir *= *)\$\(top_srcdir\)/\.bundle/gems/[^/]+(?=/))) {
+          "gem_#{$&}\n" "#{$1}$(gem_srcdir)"
+        }
+        s.sub!(/^(TIMESTAMP_DIR *= *)\$\(extout\)/) {
+          "TARGET_TOPDIR = $(topdir)/.bundle\n" "#{$1}$(TARGET_TOPDIR)"
+        }
         s.sub!(/^(TARGET_SO_DIR *= *)\$\(RUBYARCHDIR\)/) {
-          "TARGET_GEM_DIR = $(extout)/gems/$(arch)/#{@gemname}\n"\
+          "TARGET_GEM_DIR = $(TARGET_TOPDIR)/extensions/$(gem_platform)"\
+          "/$(ruby_version)#{$enable_shared ? '' : '-static'}/#{@gemname}\n"\
           "#{$1}$(TARGET_GEM_DIR)$(target_prefix)"
         }
       end
-      conf.any? {|s| /^TARGET *= *\S/ =~ s} and conf << %{
+
+      conf = yield conf if block
+
+      if conf.any? {|s| /^TARGET *= *\S/ =~ s}
+        conf << %{
+gem_platform = #{Gem::Platform.local}
 
 # default target
 all:
 
+gem = #{@gemname}
+
 build_complete = $(TARGET_GEM_DIR)/gem.build_complete
 install-so: build_complete
+clean-so:: clean-build_complete
+$(build_complete) $(OBJS): $(TARGET_SO_DIR_TIMESTAMP)
+
 build_complete: $(build_complete)
 $(build_complete): $(TARGET_SO)
 	$(Q) $(TOUCH) $@
 
+clean-build_complete:
+	-$(Q)$(RM) $(build_complete)
+
+install: gemspec
+clean: clean-gemspec
+
+gemspec = $(TARGET_TOPDIR)/specifications/$(gem).gemspec
+$(gemspec): $(gem_srcdir)/.bundled.$(gem).gemspec
+	$(Q) $(MAKEDIRS) $(@D)
+	$(Q) $(COPY) $(gem_srcdir)/.bundled.$(gem).gemspec $@
+
+gemspec: $(gemspec)
+
+clean-gemspec:
+	-$(Q)$(RM) $(gemspec)
+
+LN_S = #{config_string('LN_S')}
+CP_R = #{config_string('CP')} -r
+}
+        unless @inplace
+          %w[bin lib].each do |d|
+            next unless File.directory?("#{$top_srcdir}/#{@ext_prefix}/#{@gemname}/#{d}")
+            conf << %{
+install-rb: gem#{d}
+clean-rb:: clean-gem#{d}
+
+gem#{d} = $(TARGET_TOPDIR)/gems/$(gem)/#{d}
+gem#{d}:#{%{ $(gem#{d})\n$(gem#{d}): $(gem_srcdir)/#{d}} if $nmake}
+	$(Q) $(RUBY) $(top_srcdir)/tool/ln_sr.rb -q -f -T $(gem_srcdir)/#{d} $(gem#{d})
+
+clean-gem#{d}:
+	$(Q) $(RM_RF) $(gem#{d})
 }
+          end
+        end
+      end
+
       conf
     end
   end
+}
+
+dir = Dir.pwd
+FileUtils::makedirs(ext_prefix)
+Dir::chdir(ext_prefix)
+
+hdrdir = $hdrdir
+$hdrdir = ($top_srcdir = relative_from(srcdir, $topdir = "..")) + "/include"
+extso = []
+fails = []
+exts.each do |d|
+  $static = $force_static ? true : $static_ext.fetch(d) do
+    $static_ext.any? {|t, | File.fnmatch?(t, d)}
+  end
+
+  if !$nodynamic or $static
+    result = extmake(d, ext_prefix, !@gemname) or abort
+    extso |= $extso
+    fails << [d, result] unless result == true
+  end
 end
-gems.each do |d|
-  $extout = extout.dup
-  @gemname = d[%r{\A[^/]+}]
-  extmake(d, 'gems')
-  extso |= $extso
-end
-$extout = extout
-Dir.chdir('../ext')
 
 $top_srcdir = srcdir
 $topdir = "."
@@ -630,32 +669,13 @@ extinit = Struct.new(:c, :o) {
     super("#{src}.c", "#{src}.#{$OBJEXT}")
   end
 }.new("extinit")
-if $ignore
-  FileUtils.rm_f(extinit.to_a) if $clean
-  Dir.chdir ".."
-  if $clean
-    Dir.rmdir('ext') rescue nil
-    if $extout
-      FileUtils.rm_rf([extout+"/common", extout+"/include/ruby", extout+"/rdoc"])
-      FileUtils.rm_rf(extout+"/"+CONFIG["arch"])
-      if $clean != true
-	FileUtils.rm_rf(extout+"/include/"+CONFIG["arch"])
-	FileUtils.rm_f($mflags.defined?("INSTALLED_LIST")||ENV["INSTALLED_LIST"]||".installed.list")
-	Dir.rmdir(extout+"/include") rescue nil
-	Dir.rmdir(extout) rescue nil
-      end
-    end
-  end
-  exit
-end
 
-$extinit ||= ""
 $extobjs ||= []
 $extpath ||= []
 $extflags ||= ""
 $extlibs ||= []
+extinits = []
 unless $extlist.empty?
-  $extinit << "\n" unless $extinit.empty?
   list = $extlist.dup
   built = []
   while e = list.shift
@@ -669,27 +689,11 @@ unless $extlist.empty?
       next
     end
     base = File.basename(feature)
-    $extinit << "    init(Init_#{base}, \"#{feature}.so\");\n"
+    extinits << feature
     $extobjs << format("ext/%s/%s.%s", target, base, $LIBEXT)
     built << target
   end
 
-  src = %{\
-#include "ruby/ruby.h"
-
-#define init(func, name) {	\\
-    extern void func(void);	\\
-    ruby_init_ext(name, func);	\\
-}
-
-void ruby_init_ext(const char *name, void (*init)(void));
-
-void Init_ext(void)\n{\n#$extinit}
-}
-  if !modified?(extinit.c, MTIMES) || IO.read(extinit.c) != src
-    open(extinit.c, "w") {|fe| fe.print src}
-  end
-
   $extpath.delete("$(topdir)")
   $extflags = libpathflag($extpath) << " " << $extflags.strip
   conf = [
@@ -699,7 +703,7 @@ void Init_ext(void)\n{\n#$extinit}
   ].map {|n, v|
     "#{n}=#{v}" if v &&= v[/\S(?:.*\S)?/]
   }.compact
-  puts(*conf)
+  puts(*conf) unless $subconfigure
   $stdout.flush
   $mflags.concat(conf)
   $makeflags.concat(conf)
@@ -715,7 +719,7 @@ rubies = []
   end
 }
 
-Dir.chdir ".."
+Dir.chdir dir
 unless $destdir.to_s.empty?
   $mflags.defined?("DESTDIR") or $mflags << "DESTDIR=#{$destdir}"
 end
@@ -723,16 +727,19 @@ $makeflags.uniq!
 
 $mflags.unshift("topdir=#$topdir")
 ENV.delete("RUBYOPT")
-if $configure_only and $command_output
-  exts.map! {|d| "ext/#{d}/."}
-  gems.map! {|d| "gems/#{d}/."}
+exts.map! {|d| "#{ext_prefix}/#{d}/."}
+FileUtils.makedirs(File.dirname($command_output))
+begin
   atomic_write_open($command_output) do |mf|
     mf.puts "V = 0"
+    mf.puts "V0 = $(V:0=)"
     mf.puts "Q1 = $(V:1=)"
     mf.puts "Q = $(Q1:0=@)"
     mf.puts "ECHO1 = $(V:1=@:)"
     mf.puts "ECHO = $(ECHO1:0=@echo)"
     mf.puts "MFLAGS = -$(MAKEFLAGS)" if $nmake
+    mf.puts "override MFLAGS := $(filter-out -j%,$(MFLAGS))" if $gnumake
+    mf.puts "ext_build_dir = #{File.dirname($command_output)}"
     mf.puts
 
     def mf.macro(name, values, max = 70)
@@ -750,12 +757,14 @@ if $configure_only and $command_output
       puts
     end
 
+    mf.macro "ruby", topruby
+    mf.macro "RUBY", ["$(ruby)"]
     mf.macro "extensions", exts
-    mf.macro "gems", gems
     mf.macro "EXTOBJS", $extlist.empty? ? ["dmyext.#{$OBJEXT}"] : ["ext/extinit.#{$OBJEXT}", *$extobjs]
     mf.macro "EXTLIBS", $extlibs
     mf.macro "EXTSO", extso
     mf.macro "EXTLDFLAGS", $extflags.split
+    mf.macro "EXTINITS", extinits
     submakeopts = []
     if enable_config("shared", $enable_shared)
       submakeopts << 'DLDOBJS="$(EXTOBJS) $(EXTENCS)"'
@@ -767,21 +776,30 @@ if $configure_only and $command_output
       submakeopts << 'EXTLIBS="$(EXTLIBS)"'
     end
     submakeopts << 'EXTLDFLAGS="$(EXTLDFLAGS)"'
-    submakeopts << 'UPDATE_LIBRARIES="$(UPDATE_LIBRARIES)"'
+    submakeopts << 'EXTINITS="$(EXTINITS)"'
     submakeopts << 'SHOWFLAGS='
     mf.macro "SUBMAKEOPTS", submakeopts
+    mf.macro "NOTE_MESG", %w[$(RUBY) $(top_srcdir)/tool/lib/colorize.rb skip]
+    mf.macro "NOTE_NAME", %w[$(RUBY) $(top_srcdir)/tool/lib/colorize.rb fail]
+    %w[RM RMDIRS RMDIR RMALL].each {|w| mf.macro w, [RbConfig::CONFIG[w]]}
+    if $nmake
+      message = ['@(for %I in (', ') do @echo.%~I)']
+    else
+      message = ['@for line in', '; do echo "$$line"; done']
+    end
+    mf.macro "MESSAGE_BEGIN", [message.first]
+    mf.macro "MESSAGE_END", [message.last]
     mf.puts
     targets = %w[all install static install-so install-rb clean distclean realclean]
     targets.each do |tgt|
       mf.puts "#{tgt}: $(extensions:/.=/#{tgt})"
-      mf.puts "#{tgt}: $(gems:/.=/#{tgt})" unless tgt == 'static'
       mf.puts "#{tgt}: note" unless /clean\z/ =~ tgt
     end
     mf.puts
     mf.puts "clean:\n\t-$(Q)$(RM) ext/extinit.#{$OBJEXT}"
     mf.puts "distclean:\n\t-$(Q)$(RM) ext/extinit.c"
     mf.puts
-    mf.puts "#{rubies.join(' ')}: $(extensions:/.=/#{$force_static ? 'static' : 'all'}) $(gems:/.=/all)"
+    mf.puts "#{rubies.join(' ')}: $(extensions:/.=/#{$force_static ? 'static' : 'all'})"
     submake = "$(Q)$(MAKE) $(MFLAGS) $(SUBMAKEOPTS)"
     mf.puts "all static: #{rubies.join(' ')}\n"
     $extobjs.each do |tgt|
@@ -792,63 +810,66 @@ if $configure_only and $command_output
       mf.puts "#{tgt}:\n\t#{submake} $@"
     end
     mf.puts "libencs:\n\t$(Q)$(MAKE) -f enc.mk V=$(V) $@"
-    mf.puts "ext/extinit.#{$OBJEXT}:\n\t$(Q)$(MAKE) $(MFLAGS) V=$(V) $@" if $static
+    mf.puts "ext/extinit.#{$OBJEXT}:\n\t$(Q)$(MAKE) $(MFLAGS) V=$(V) EXTINITS=\"$(EXTINITS)\" $@" if $static
     mf.puts
     if $gnumake == "yes"
       submake = "$(MAKE) -C $(@D)"
     else
-      submake = "cd $(@D) && "
-      config_string("exec") {|str| submake << str << " "}
-      submake << "$(MAKE)"
+      submake = ["cd", (sep ? "$(@D:/=#{sep})" : "$(@D)"), "&&"]
+      config_string("exec") {|str| submake << str}
+      submake = (submake << "$(MAKE)").join(" ")
     end
-    gems = exts + gems
     targets.each do |tgt|
-      (tgt == 'static' ? exts : gems).each do |d|
-        mf.puts "#{d[0..-2]}#{tgt}:\n\t$(Q)#{submake} $(MFLAGS) V=$(V) $(@F)"
+      exts.each do |d|
+        d = d[0..-2]
+        t = "#{d}#{tgt}"
+        if clean = /^(dist|real)?clean$/.match(tgt)
+          deps = exts.select {|e|e.start_with?(d)}.map {|e|"#{e[0..-2]}#{tgt}"} - [t]
+          pd = [' clean-local', *deps].join(' ')
+        else
+          pext = File.dirname(d)
+          pd = " #{pext}/#{tgt}" if exts.include?("#{pext}/.")
+        end
+        mf.puts "#{t}:#{pd}\n\t$(Q)#{submake} $(MFLAGS) V=$(V) $(@F)"
+        if clean and clean.begin(1)
+          mf.puts "\t$(Q)$(RM) $(ext_build_dir)/exts.mk\n\t$(Q)$(RMDIRS) $(@D)"
+        end
       end
     end
+    mf.puts "\n""clean-local:\n\t$(Q)$(RM) $(ext_build_dir)/*~ $(ext_build_dir)/*.bak $(ext_build_dir)/core"
     mf.puts "\n""extso:\n"
     mf.puts "\t@echo EXTSO=$(EXTSO)"
 
     mf.puts "\n""note:\n"
     unless fails.empty?
-      mf.puts %Q<\t@echo "*** Following extensions failed to configure:">
-      fails.each do |d, n, err|
-        d = "#{d}:#{n}:"
-        if err
-          d << " " << err
+      abandon = false
+      mf.puts "note: note-body\n"
+      mf.puts "note-body:: note-header\n"
+      mf.puts "note-header:\n"
+      mf.puts %Q<\t@$(NOTE_MESG) "*** Following extensions are not compiled:">
+      mf.puts "note-body:: note-header\n"
+      fails.each do |ext, (parent, err)|
+        abandon ||= mandatory_exts[ext]
+        mf.puts %Q<\t@$(NOTE_NAME) "#{ext}:">
+        mf.puts "\t$(MESSAGE_BEGIN) \\"
+        if parent
+          mf.puts %Q<\t"\tCould not be configured. It will not be installed." \\>
+          err and err.scan(/.+/) do |ee|
+            mf.puts %Q<\t"\t#{ee.gsub(/["`$^]/, '\\\\\\&')}" \\>
+          end
+          mf.puts %Q<\t"\tCheck #{ext_prefix}/#{ext}/mkmf.log for more details." \\>
+        else
+          mf.puts %Q<\t"\tSkipped because its parent was not configured." \\>
         end
-        mf.puts %Q<\t@echo "#{d}">
+        mf.puts "\t$(MESSAGE_END)"
       end
-      mf.puts %Q<\t@echo "*** Fix the problems, then remove these directories and try again if you want.">
-    end
-
-  end
-elsif $command_output
-  message = "making #{rubies.join(', ')}"
-  message = "echo #{message}"
-  $mflags.concat(rubies)
-  $makeflags.concat(rubies)
-  cmd = $makeflags.map {|ss|ss.sub(/.*[$(){};\s].*/, %q['\&'])}.join(' ')
-  open($command_output, 'wb') do |ff|
-    case $command_output
-    when /\.sh\z/
-      ff.puts message, "rm -f \"$0\"; exec \"$@\" #{cmd}"
-    when /\.bat\z/
-      ["@echo off", message, "%* #{cmd}", "del %0 & exit %ERRORLEVEL%"].each do |ss|
-        ff.print ss, "\r\n"
+      mf.puts "note:\n"
+      mf.puts %Q<\t@$(NOTE_MESG) "*** Fix the problems, then remove these directories and try again if you want.">
+      if abandon
+        mf.puts "\t""@exit 1"
       end
-    else
-      ff.puts cmd
     end
-    ff.chmod(0755)
   end
-elsif !$configure_only
-  message = "making #{rubies.join(', ')}"
-  puts message
-  $stdout.flush
-  $mflags.concat(rubies)
-  system($make, *$mflags) or exit($?.exitstatus)
 end
 # :startdoc: