diff --git a/Formula/net6.rb b/Formula/net6.rb
index a1b176cea7..7a13d2dbf3 100644
--- a/Formula/net6.rb
+++ b/Formula/net6.rb
@@ -3,13 +3,16 @@ class Net6 < Formula
   homepage "http://gobby.0x539.de"
   url "http://releases.0x539.de/net6/net6-1.3.14.tar.gz"
   sha256 "155dd82cbe1f8354205c79ab2bb54af4957047422250482596a34b0e0cc61e21"
-  revision 1
+  revision 2
 
   depends_on "pkg-config" => :build
   depends_on "gnutls"
   depends_on "libsigc++"
 
+  needs :cxx11
+
   def install
+    ENV.cxx11
     system "./configure", "--disable-dependency-tracking", "--prefix=#{prefix}"
     system "make", "install"
   end
diff --git a/Formula/nordugrid-arc.rb b/Formula/nordugrid-arc.rb
index 412bdcea8c..bdf7d8b8a6 100644
--- a/Formula/nordugrid-arc.rb
+++ b/Formula/nordugrid-arc.rb
@@ -4,6 +4,7 @@ class NordugridArc < Formula
   url "http://download.nordugrid.org/packages/nordugrid-arc/releases/5.0.0/src/nordugrid-arc_5.0.0.orig.tar.gz"
   mirror "https://mirrors.kernel.org/debian/pool/main/n/nordugrid-arc/nordugrid-arc_5.0.0.orig.tar.gz"
   sha256 "59132ce88f0d88d9a08a56eb879fe9bd07b2eedfce1506508e71457b7f4add1b"
+  revision 1
 
   bottle do
     sha256 "db44e56921dda90426b9bb78ac996bcc261e6e169584636bae3ed7acd31aa229" => :yosemite
@@ -18,12 +19,15 @@ class NordugridArc < Formula
   depends_on "libxml2"
   depends_on "globus-toolkit"
 
+  needs :cxx11
+
   fails_with :clang do
     build 500
     cause "Fails with 'template specialization requires \"template<>\"'"
   end
 
   def install
+    ENV.cxx11
     system "./configure", "--disable-dependency-tracking",
                           "--disable-swig",
                           "--prefix=#{prefix}"
diff --git a/Formula/nzbget.rb b/Formula/nzbget.rb
index 785c619dfc..faaff94bc1 100644
--- a/Formula/nzbget.rb
+++ b/Formula/nzbget.rb
@@ -3,6 +3,7 @@ class Nzbget < Formula
   homepage "http://nzbget.net/"
   url "https://github.com/nzbget/nzbget/releases/download/v15.0/nzbget-15.0-src.tar.gz"
   sha256 "3ef13f3e5917e4cda19c4fc0cd37e79967a19b4e3448c239ff24e37712a6cc0a"
+  revision 1
 
   head "https://github.com/nzbget/nzbget.git"
 
@@ -16,6 +17,8 @@ class Nzbget < Formula
   depends_on "openssl"
   depends_on "libsigc++"
 
+  needs :cxx11
+
   fails_with :clang do
     build 500
     cause <<-EOS.undent
@@ -30,6 +33,7 @@ class Nzbget < Formula
   end
 
   def install
+    ENV.cxx11
     resource("libpar2").stage do
       system "./configure", "--disable-dependency-tracking",
                             "--prefix=#{libexec}/lp2"
diff --git a/Formula/synfig.rb b/Formula/synfig.rb
index d9445161b0..2d65757c18 100644
--- a/Formula/synfig.rb
+++ b/Formula/synfig.rb
@@ -3,6 +3,7 @@ class Synfig < Formula
   homepage "http://synfig.org"
   url "https://downloads.sourceforge.net/project/synfig/releases/1.0/source/synfig-1.0.tar.gz"
   sha256 "1f2f9b209d49dff838049e9817b0458ac6987e912a56c061aa2f9c2faeb40720"
+  revision 1
 
   head "git://synfig.git.sourceforge.net/gitroot/synfig/synfig"
 
@@ -28,7 +29,10 @@ class Synfig < Formula
   depends_on "mlt"
   depends_on "libtool" => :run
 
+  needs :cxx11
+
   def install
+    ENV.cxx11
     boost = Formula["boost"]
     system "./configure", "--disable-debug",
                           "--disable-dependency-tracking",
@@ -111,7 +115,7 @@ class Synfig < Formula
       -lxml++-2.6
       -lxml2
     ]
-    system ENV.cxx, "test.cpp", "-o", "test", *flags
+    system ENV.cxx, "-std=c++11", "test.cpp", "-o", "test", *flags
     system "./test"
   end
 end
diff --git a/Formula/synfigstudio.rb b/Formula/synfigstudio.rb
index 5017b93d6c..e046f2143a 100644
--- a/Formula/synfigstudio.rb
+++ b/Formula/synfigstudio.rb
@@ -3,6 +3,7 @@ class Synfigstudio < Formula
   homepage "http://synfig.org"
   url "https://downloads.sourceforge.net/project/synfig/releases/1.0/source/synfigstudio-1.0.tar.gz"
   sha256 "2b23916ca0be4073edad9b0cb92fd30311dd3b8f73372c836ba735100251ee28"
+  revision 1
 
   bottle do
     revision 1
@@ -19,7 +20,10 @@ class Synfigstudio < Formula
   depends_on "etl"
   depends_on "synfig"
 
+  needs :cxx11
+
   def install
+    ENV.cxx11
     system "./configure", "--disable-debug",
                           "--disable-dependency-tracking",
                           "--prefix=#{prefix}"