1 files changed, 98 insertions, 0 deletions
diff --git a/template/exts.mk.tmpl b/template/exts.mk.tmpl
new file mode 100644
index 0000000000..6fadf79108
--- /dev/null
+++ b/template/exts.mk.tmpl
@@ -0,0 +1,98 @@
+# -*- makefile -*-
+V = 0
+Q1 = $(V:1=)
+Q = $(Q1:0=@)
+ECHO1 = $(V:1=@:)
+ECHO = $(ECHO1:0=@echo)
+<%
+require './rbconfig'
+macros = {}
+deps = []
+note = []
+Dir.glob("ext/*/exts.mk") do |e|
+  s = File.read(e)
+  s.scan(/^(extensions|EXT[A-Z]+)[ \t]*=[ \t]*((?>(?>[^\\\n]|\\.)*\\\n)*(?>[^\\\n]|\\.)*)$/) do |n, v|
+    v.gsub!(/\\\n[ \t]*/, ' ')
+    next if v.empty?
+    v = v.split
+    m = macros[n] ||= []
+    case n
+    when "LIBS"
+      m.concat(v)
+    else
+      macros[n] = m | v
+    end
+  end
+  s.scan(%r"^(ext/\S+)/[^/\s:]+:[ \t]*\1/static$|^(?:ruby|install(?:-(?:so|rb))?|static|(?:dist|real)?clean):.+$") do
+    deps << $&
+  end
+  s.scan(%r"^note:\n((?:\t.+\n)+)") do |(n)|
+    note |= n.split(/^/)
+  end
+end
+deps.uniq!
+if objs = macros["EXTOBJS"] and objs.any? {|e|e.start_with?("ext/extinit.")}
+  objs.delete_if {|e|e.start_with?("dmyext.")}
+end
+macros.default = [].freeze
+class Array
+  def fold(h, w = 70)
+    return "" if empty?
+    w -= h
+    ret = [s = String.new]
+    each do |e|
+      if s.size + e.size + 1 > w
+        ret << (s = String.new)
+      end
+      s << " " << e
+    end
+    ret.join(" \\\n" + "\t" * (h / 8) + " " * (h % 8))
+  end
+end
+@erbout = _erbout
+def self.column
+  w = 0
+  @erbout[/^.*\z/].scan(/\t|([^\t]+)/) {|s,| w += (s ? s.size : 8 - w % 8)}
+  w
+end
+targets = %w[all static install install-so install-rb clean distclean realclean]
+objext = RbConfig::CONFIG["OBJEXT"]
+%>
+
+extensions =<%= macros["extensions"].fold(column) %>
+gems =
+EXTOBJS =<%= macros["EXTOBJS"].fold(column) %>
+EXTLIBS =<%= macros["EXTLIBS"].fold(column) %>
+EXTSO =<%= macros["EXTSO"].fold(column) %>
+EXTLDFLAGS =<%= macros["EXTLDFLAGS"].fold(column) %>
+EXTINITS =<%= macros["EXTINITS"].fold(column) %>
+SUBMAKEOPTS = DLDOBJS="$(EXTOBJS) $(EXTENCS)" EXTOBJS= \
+	      EXTSOLIBS="$(EXTLIBS)" LIBRUBY_SO_UPDATE=$(LIBRUBY_EXTS) \
+	      EXTLDFLAGS="$(EXTLDFLAGS)" EXTINITS="$(EXTINITS)" \
+	      UPDATE_LIBRARIES="$(UPDATE_LIBRARIES)" SHOWFLAGS=
+
+all static: ruby
+
+clean:
+	-$(Q)$(RM) ext/extinit.<%= objext %>
+distclean:
+	-$(Q)$(RM) ext/extinit.c
+
+<%= deps.join("\n") %>
+ruby:
+	$(Q)$(MAKE) $(MFLAGS) $(SUBMAKEOPTS) $@
+libencs:
+	$(Q)$(MAKE) -f enc.mk V=$(V) $@
+ext/extinit.<%=objext%>:
+	$(Q)$(MAKE) $(MFLAGS) V=$(V) EXTINITS="$(EXTINITS)" $@
+
+% targets.product(macros["extensions"].map {|e|e.chomp("/.")}) do |t, e|
+<%=e%>/<%=t%>:
+	$(Q)$(MAKE) -C $(@D) $(MFLAGS) V=$(V) $(@F)
+% end
+
+extso:
+	@echo EXTSO=$(EXTSO)
+
+note:
+<%= note.join("") %>