diff --git a/Formula/llvm@3.7.rb b/Formula/llvm@3.7.rb
new file mode 100644
index 0000000000..334998aa7c
--- /dev/null
+++ b/Formula/llvm@3.7.rb
@@ -0,0 +1,221 @@
+class LlvmAT37 < Formula
+  desc "Next-gen compiler infrastructure"
+  homepage "http://llvm.org/"
+
+  stable do
+    url "http://llvm.org/releases/3.7.1/llvm-3.7.1.src.tar.xz"
+    sha256 "be7794ed0cec42d6c682ca8e3517535b54555a3defabec83554dbc74db545ad5"
+
+    resource "clang" do
+      url "http://llvm.org/releases/3.7.1/cfe-3.7.1.src.tar.xz"
+      sha256 "56e2164c7c2a1772d5ed2a3e57485ff73ff06c97dff12edbeea1acc4412b0674"
+    end
+
+    resource "clang-tools-extra" do
+      url "http://llvm.org/releases/3.7.1/clang-tools-extra-3.7.1.src.tar.xz"
+      sha256 "4a91edaccad1ce984c7c49a4a87db186b7f7b21267b2b03bcf4bd7820715bc6b"
+    end
+
+    resource "polly" do
+      url "http://llvm.org/releases/3.7.1/polly-3.7.1.src.tar.xz"
+      sha256 "ce9273ad315e1904fd35dc64ac4375fd592f3c296252ab1d163b9ff593ec3542"
+    end
+
+    resource "libcxx" do
+      url "http://llvm.org/releases/3.7.1/libcxx-3.7.1.src.tar.xz"
+      sha256 "357fbd4288ce99733ba06ae2bec6f503413d258aeebaab8b6a791201e6f7f144"
+    end
+
+    if MacOS.version <= :snow_leopard
+      resource "libcxxabi" do
+        url "http://llvm.org/releases/3.7.1/libcxxabi-3.7.1.src.tar.xz"
+        sha256 "a47faaed90f577da8ca3b5f044be9458d354a53fab03003a44085a912b73ab2a"
+      end
+    end
+  end
+
+  head do
+    url "http://llvm.org/git/llvm.git", :branch => "release_37"
+
+    resource "clang" do
+      url "http://llvm.org/git/clang.git", :branch => "release_37"
+    end
+
+    resource "clang-tools-extra" do
+      url "http://llvm.org/git/clang-tools-extra.git", :branch => "release_37"
+    end
+
+    resource "polly" do
+      url "http://llvm.org/git/polly.git", :branch => "release_37"
+    end
+
+    resource "libcxx" do
+      url "http://llvm.org/git/libcxx.git", :branch => "release_37"
+    end
+
+    if MacOS.version <= :snow_leopard
+      resource "libcxxabi" do
+        url "http://llvm.org/git/libcxxabi.git", :branch => "release_37"
+      end
+    end
+  end
+
+  patch :DATA
+
+  depends_on "gnu-sed" => :build
+  depends_on "gmp"
+  depends_on "libffi"
+
+  # version suffix
+  def ver
+    "3.7"
+  end
+
+  # LLVM installs its own standard library which confuses stdlib checking.
+  cxxstdlib_check :skip
+
+  # Apple's libstdc++ is too old to build LLVM
+  fails_with :gcc
+
+  def install
+    # One of llvm makefiles relies on gnu sed behavior to generate CMake modules correctly
+    ENV.prepend_path "PATH", "#{Formula["gnu-sed"].opt_libexec}/gnubin"
+    # Apple's libstdc++ is too old to build LLVM
+    ENV.libcxx if ENV.compiler == :clang
+
+    clang_buildpath = buildpath/"tools/clang"
+    libcxx_buildpath = buildpath/"projects/libcxx"
+    libcxxabi_buildpath = buildpath/"libcxxabi" # build failure if put in projects due to no Makefile
+
+    clang_buildpath.install resource("clang")
+    libcxx_buildpath.install resource("libcxx")
+    (buildpath/"tools/polly").install resource("polly")
+    (buildpath/"tools/clang/tools/extra").install resource("clang-tools-extra")
+
+    ENV["REQUIRES_RTTI"] = "1"
+
+    install_prefix = lib/"llvm-#{ver}"
+
+    args = %W[
+      --prefix=#{install_prefix}
+      --enable-optimized
+      --disable-bindings
+      --with-gmp=#{Formula["gmp"].opt_prefix}
+      --enable-shared
+      --enable-targets=host
+      --enable-libffi
+    ]
+
+    mktemp do
+      system buildpath/"configure", *args
+      system "make", "VERBOSE=1"
+      system "make", "VERBOSE=1", "install"
+    end
+
+    if MacOS.version <= :snow_leopard
+      libcxxabi_buildpath.install resource("libcxxabi")
+
+      cd libcxxabi_buildpath/"lib" do
+        # Set rpath to save user from setting DYLD_LIBRARY_PATH
+        inreplace "buildit", "-install_name /usr/lib/libc++abi.dylib", "-install_name #{install_prefix}/usr/lib/libc++abi.dylib"
+
+        ENV["CC"] = "#{install_prefix}/bin/clang"
+        ENV["CXX"] = "#{install_prefix}/bin/clang++"
+        ENV["TRIPLE"] = "*-apple-*"
+        system "./buildit"
+        (install_prefix/"usr/lib").install "libc++abi.dylib"
+        cp libcxxabi_buildpath/"include/cxxabi.h", install_prefix/"lib/c++/v1"
+      end
+
+      # Snow Leopard make rules hardcode libc++ and libc++abi path.
+      # Change to Cellar path here.
+      inreplace "#{libcxx_buildpath}/lib/buildit" do |s|
+        s.gsub! "-install_name /usr/lib/libc++.1.dylib", "-install_name #{install_prefix}/usr/lib/libc++.1.dylib"
+        s.gsub! "-Wl,-reexport_library,/usr/lib/libc++abi.dylib", "-Wl,-reexport_library,#{install_prefix}/usr/lib/libc++abi.dylib"
+      end
+
+      # On Snow Leopard and older system libc++abi is not shipped but
+      # needed here. It is hard to tweak environment settings to change
+      # include path as libc++ uses a custom build script, so just
+      # symlink the needed header here.
+      ln_s libcxxabi_buildpath/"include/cxxabi.h", libcxx_buildpath/"include"
+    end
+
+    if MacOS.version >= :el_capitan
+      inreplace "#{libcxx_buildpath}/include/string",
+        "basic_string<_CharT, _Traits, _Allocator>::basic_string(const allocator_type& __a)",
+        "basic_string<_CharT, _Traits, _Allocator>::basic_string(const allocator_type& __a) noexcept(is_nothrow_copy_constructible<allocator_type>::value)"
+    end
+
+    # Putting libcxx in projects only ensures that headers are installed.
+    # Manually "make install" to actually install the shared libs.
+    libcxx_make_args = [
+      # Use the built clang for building
+      "CC=#{install_prefix}/bin/clang",
+      "CXX=#{install_prefix}/bin/clang++",
+      # Properly set deployment target, which is needed for Snow Leopard
+      "MACOSX_DEPLOYMENT_TARGET=#{MacOS.version}",
+      # The following flags are needed so it can be installed correctly.
+      "DSTROOT=#{install_prefix}",
+      "SYMROOT=#{libcxx_buildpath}",
+    ]
+
+    system "make", "-C", libcxx_buildpath, "install", *libcxx_make_args
+
+    (share/"clang-#{ver}/tools").install Dir["tools/clang/tools/scan-{build,view}"]
+    inreplace share/"clang-#{ver}/tools/scan-build/scan-build", "$RealBin/bin/clang", install_prefix/"bin/clang"
+    ln_s share/"clang-#{ver}/tools/scan-build/scan-build", install_prefix/"bin"
+    ln_s share/"clang-#{ver}/tools/scan-view/scan-view", install_prefix/"bin"
+    (install_prefix/"share/man/man1").install share/"clang-#{ver}/tools/scan-build/scan-build.1"
+
+    (lib/"python2.7/site-packages").install "bindings/python/llvm" => "llvm-#{ver}",
+                                            clang_buildpath/"bindings/python/clang" => "clang-#{ver}"
+
+    Dir.glob(install_prefix/"bin/*") do |exec_path|
+      basename = File.basename(exec_path)
+      bin.install_symlink exec_path => "#{basename}-#{ver}"
+    end
+
+    Dir.glob(install_prefix/"share/man/man1/*") do |manpage|
+      basename = File.basename(manpage, ".1")
+      man1.install_symlink manpage => "#{basename}-#{ver}.1"
+    end
+  end
+
+  def caveats; <<-EOS.undent
+    Extra tools are installed in #{opt_share}/clang-#{ver}
+
+    To link to libc++, something like the following is required:
+      CXX="clang++-#{ver} -stdlib=libc++"
+      CXXFLAGS="$CXXFLAGS -nostdinc++ -I#{opt_lib}/llvm-#{ver}/include/c++/v1"
+      LDFLAGS="$LDFLAGS -L#{opt_lib}/llvm-#{ver}/lib"
+    EOS
+  end
+
+  test do
+    # test for sed errors since some llvm makefiles assume that sed
+    # understands '\n' which is true for gnu sed and not for bsd sed.
+    assert_no_match /PATH\)n/, (lib/"llvm-3.7/share/llvm/cmake/LLVMConfig.cmake").read
+    system "#{bin}/llvm-config-#{ver}", "--version"
+  end
+end
+
+__END__
+diff --git a/Makefile.rules b/Makefile.rules
+index ebebc0a..b0bb378 100644
+--- a/Makefile.rules
++++ b/Makefile.rules
+@@ -599,7 +599,12 @@ ifneq ($(HOST_OS), $(filter $(HOST_OS), Cygwin MingW))
+ ifneq ($(HOST_OS),Darwin)
+   LD.Flags += $(RPATH) -Wl,'$$ORIGIN'
+ else
+-  LD.Flags += -Wl,-install_name  -Wl,"@rpath/lib$(LIBRARYNAME)$(SHLIBEXT)"
++  LD.Flags += -Wl,-install_name
++  ifdef LOADABLE_MODULE
++    LD.Flags += -Wl,"$(PROJ_libdir)/$(LIBRARYNAME)$(SHLIBEXT)"
++  else
++    LD.Flags += -Wl,"$(PROJ_libdir)/$(SharedPrefix)$(LIBRARYNAME)$(SHLIBEXT)"
++  endif
+ endif
+ endif
+ endif
diff --git a/formula_renames.json b/formula_renames.json
index 99a042ebbb..7417f65aac 100644
--- a/formula_renames.json
+++ b/formula_renames.json
@@ -32,6 +32,7 @@
   "libcppa": "caf",
   "libmongoclient": "mongo-cxx-driver",
   "libmpc08": "libmpc@0.8",
+  "llvm37": "llvm@3.7",
   "mongo-c": "mongo-c-driver",
   "mpfr2": "mpfr@2",
   "mpich2": "mpich",