nobu	2013-12-31 18:32:38 +0900 (Tue, 31 Dec 2013)

  New Revision: 44470

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=44470

  Log:
    mkmf.rb: fix for 1.8 baseruby
    
    * lib/mkmf.rb (init_mkmf): fix for 1.8 baseruby.  RbConfig of 1.8
      did not have CXXFLAGS.

  Modified files:
    trunk/lib/mkmf.rb
Index: lib/mkmf.rb
===================================================================
--- lib/mkmf.rb	(revision 44469)
+++ lib/mkmf.rb	(revision 44470)
@@ -2398,7 +2398,7 @@ site-install-rb: install-rb https://github.com/ruby/ruby/blob/trunk/lib/mkmf.rb#L2398
       $warnflags = config['warnflags'] unless $extmk
     end
     $CFLAGS = with_config("cflags", arg_config("CFLAGS", config["CFLAGS"])).dup
-    $CXXFLAGS = with_config("cxxflags", arg_config("CXXFLAGS", config["CXXFLAGS"])).dup
+    $CXXFLAGS = (with_config("cxxflags", arg_config("CXXFLAGS", config["CXXFLAGS"]))||'').dup
     $ARCH_FLAG = with_config("arch_flag", arg_config("ARCH_FLAG", config["ARCH_FLAG"])).dup
     $CPPFLAGS = with_config("cppflags", arg_config("CPPFLAGS", config["CPPFLAGS"])).dup
     $LDFLAGS = with_config("ldflags", arg_config("LDFLAGS", config["LDFLAGS"])).dup

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