diff --git a/Rakefile b/Rakefile
index cd3b7fda..259ef07a 100644
--- a/Rakefile
+++ b/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"
@@ -42,7 +41,7 @@ task :manual_compile do
   require File.expand_path '../ext/libv8/arch.rb', __FILE__
   include Libv8::Arch
   Dir.chdir(V8_Source) do
-    sh %Q{#{make} -j2 #{libv8_arch}.release GYPFLAGS="-Dhost_arch=#{libv8_arch}"}
+    sh %Q{#{make} -j2 #{libv8_arch}.release}
   end
 end
 
diff --git a/ext/libv8/builder.rb b/ext/libv8/builder.rb
index 33ac22b7..3689c22f 100644
--- a/ext/libv8/builder.rb
+++ b/ext/libv8/builder.rb
@@ -1,3 +1,4 @@
+require 'mkmf'
 require File.expand_path '../compiler', __FILE__
 require File.expand_path '../arch', __FILE__
 require File.expand_path '../make', __FILE__
@@ -8,11 +9,20 @@ class Builder
     include Libv8::Compiler
     include Libv8::Make
 
-    def build_libv8!
+    def make_flags(*flags)
       profile = enable_config('debug') ? 'debug' : 'release'
 
+      # FreeBSD uses gcc 4.2 by default which leads to
+      # compilation failures due to warnings about aliasing.
+      # http://svnweb.freebsd.org/ports/head/lang/v8/Makefile?view=markup
+      flags << "strictaliasing=off" if RUBY_PLATFORM.include?("freebsd") and !check_gcc_compiler(compiler)
+
+      "#{libv8_arch}.#{profile} #{flags.join ' '}"
+    end
+
+    def build_libv8!
       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} #{make_flags}`
       end
       return $?.exitstatus
     end
diff --git a/lib/libv8/fpic-on-freebsd-amd64.patch b/lib/libv8/fpic-on-freebsd-amd64.patch
deleted file mode 100644
index b5a7c39b..00000000
--- a/lib/libv8/fpic-on-freebsd-amd64.patch
+++ /dev/null
@@ -1,16 +0,0 @@
-diff --git a/SConstruct b/SConstruct
-index 4a7e182..b462335 100644
---- a/SConstruct
-+++ b/SConstruct
-@@ -124,6 +124,10 @@ LIBRARY_FLAGS = {
-       'LIBPATH' : ['/usr/local/lib'],
-       'CCFLAGS':      ['-ansi'],
--      'LIBS': ['execinfo']
-+      'LIBS': ['execinfo'],
-+      'arch:x64': {
-+        'CCFLAGS':      ['-fPIC'],
-+        'CXXFLAGS':     ['-fPIC']
-+      },
-     },
-     'os:openbsd': {
-       'CPPPATH' : ['/usr/local/include'],
diff --git a/patches/gcc42-on-freebsd.patch b/patches/gcc42-on-freebsd.patch
deleted file mode 100644
index c353c27d..00000000
--- a/patches/gcc42-on-freebsd.patch
+++ /dev/null
@@ -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' ],
-           }],
diff --git a/patches/src_platform-freebsd.cc.patch b/patches/src_platform-freebsd.cc.patch
deleted file mode 100644
index adc671eb..00000000
--- a/patches/src_platform-freebsd.cc.patch
+++ /dev/null
@@ -1,10 +0,0 @@
---- src/platform-freebsd.cc.orig	2012-05-12 16:47:50.556202492 +0100
-+++ src/platform-freebsd.cc	2012-05-12 16:37:59.924934272 +0100
-@@ -554,6 +554,7 @@
-     ASSERT(result == 0);
-     result = pthread_mutex_init(&mutex_, &attrs);
-     ASSERT(result == 0);
-+    USE(result);
-   }
- 
-   virtual ~FreeBSDMutex() { pthread_mutex_destroy(&mutex_); }