extconf.rb in google_hash-0.8.1

- old
+ new

@@ -18,10 +18,11 @@
     system "make install"
   end
 end
 
 $CFLAGS += " -I./local_installed/include "
+$CPPFLAGS += " -I./local_installed/include "
 
 if RUBY_VERSION < '1.9'
   # appears to link using gcc on 1.8 [mingw at least]
   $LDFLAGS += " -lstdc++ "
 end
@@ -104,6 +105,13 @@
 # write our Init method
 
 template = ERB.new(File.read('template/main.cpp.erb'))
 File.write 'main.cpp', template.result(binding)
 
+Config::CONFIG['CPP'] = "g++ -E" # else cannot check for c++ headers? huh wuh?
+have_header('tr1/functional')
+
+if have_header('functional') && OS.x?
+  $CPPFLAGS += " -std=c++11 -stdlib=libc++ " # LLVM, no idea what I'm doing here...
+end
+
 create_makefile('google_hash')