Add gcc-4.0 to fails_with

Library/Homebrew/compilers.rb

@@ -67,6 +67,7 @@ class CompilerSelector
     when :clang then MacOS.clang_build_version >= 318 ? 3 : 0.5
     when :llvm  then 2
     when :gcc   then 1
+    when :gcc_4_0 then 0.25
     end
   end
 end

Library/Homebrew/macos.rb

@@ -127,6 +127,7 @@ module MacOS extend self
       $1.to_i
     end
   end
+  alias_method :gcc_4_0_build_version, :gcc_40_build_version
 
   def gcc_42_build_version
     @gcc_42_build_version ||= if locate("gcc-4.2") \