Add no-strict-aliasing to FreeBSD/gcc42 builds

Remove the patch that was not getting applied on rake build on a
buildhost and add a conditional make flag in builder.rb. This commit
fixes #68

Rakefile

@@ -28,7 +28,6 @@ task :checkout do
   # Based on: https://chromiumcodereview.appspot.com/10079030/patch/1/2
   sh "patch -N -p0 -d vendor/v8 < patches/add-freebsd9-and-freebsd10-to-gyp-GetFlavor.patch"
   sh "patch -N -p1 -d vendor/v8 < patches/fPIC-on-x64.patch"
-  sh "patch -N -p1 -d vendor/v8 < patches/gcc42-on-freebsd.patch" if RUBY_PLATFORM.include?("freebsd") && !system("pkg_info | grep gcc-4")
 end
 
 desc "compile v8 via the ruby extension mechanism"

ext/libv8/builder.rb

@@ -11,8 +11,11 @@ module Libv8
     def build_libv8!
       profile = enable_config('debug') ? 'debug' : 'release'
 
+      gypflags = ["-Dhost_arch=#{libv8_arch}"]
+      gypflags << "-Dv8_no_strict_aliasing=1" if RUBY_PLATFORM.include?("freebsd") && !check_gcc_compiler(compiler)
+
       Dir.chdir(File.expand_path '../../../vendor/v8', __FILE__) do
-        puts `env CXX=#{compiler} LINK=#{compiler} #{make} #{libv8_arch}.#{profile} GYPFLAGS="-Dhost_arch=#{libv8_arch}"`
+        puts `env CXX=#{compiler} LINK=#{compiler} #{make} #{libv8_arch}.#{profile} GYPFLAGS="#{gypflags.join ' '}"`
       end
       return $?.exitstatus
     end

patches/gcc42-on-freebsd.patch

@@ -1,14 +0,0 @@
-diff --git a/build/standalone.gypi b/build/standalone.gypi
-index ebdf557..c7a59bc 100644
---- a/build/standalone.gypi
-+++ b/build/standalone.gypi
-@@ -98,6 +98,9 @@
-           [ 'OS=="linux"', {
-             'cflags': [ '-ansi' ],
-           }],
-+          [ 'OS=="freebsd"', {
-+            'cflags': [ '-fno-strict-aliasing', ],
-+          }],
-           [ 'visibility=="hidden"', {
-             'cflags': [ '-fvisibility=hidden' ],
-           }],