no Borland make [ci skip]

* ext/extmk.rb: remove Borland make support.  Borland C++ has not
  been supported since years ago.

* lib/mkmf.rb: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56051 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/extmk.rb

@@ -694,18 +694,6 @@ unless $destdir.to_s.empty?
 end
 $makeflags.uniq!
 
-if $nmake == ?b
-  unless (vars = $mflags.grep(/\A\w+=/n)).empty?
-    open(mkf = "libruby.mk", "wb") do |tmf|
-      tmf.puts("!include Makefile")
-      tmf.puts
-      tmf.puts(*vars.map {|v| v.sub(/\=/, " = ")})
-      tmf.puts("PRE_LIBRUBY_UPDATE = del #{mkf}")
-    end
-    $mflags.unshift("-f#{mkf}")
-    vars.each {|flag| flag.sub!(/\A/, "-D")}
-  end
-end
 $mflags.unshift("topdir=#$topdir")
 ENV.delete("RUBYOPT")
 if $configure_only and $command_output

lib/mkmf.rb

@@ -2015,15 +2015,6 @@ TOUCH = exit >
 
 preload = #{defined?($preload) && $preload ? $preload.join(' ') : ''}
 }
-    if $nmake == ?b
-      mk.each do |x|
-        x.gsub!(/^(MAKEDIRS|INSTALL_(?:PROG|DATA))+\s*=.*\n/) do
-          "!ifndef " + $1 + "\n" +
-          $& +
-          "!endif\n"
-        end
-      end
-    end
     mk
   end
 
@@ -2425,7 +2416,6 @@ site-install-rb: install-rb
 
     return unless target
 
-    mfile.puts SRC_EXT.collect {|e| ".path.#{e} = $(VPATH)"} if $nmake == ?b
     mfile.print ".SUFFIXES: .#{(SRC_EXT + [$OBJEXT, $ASMEXT]).compact.join(' .')}\n"
     mfile.print "\n"