We no longer support GCC 4.6. Version 4.8+ is recommended.

Ubuntu Precise users can install GCC 4.8 from the ppa:ubuntu-toolchain-r/test repository.
CentOS 5/6 users can install devtoolset-2 or later.

.travis.yml

@@ -2,15 +2,22 @@ language: cpp
 sudo: false
 matrix:
   include:
-    - compiler: gcc
-      env: PYTHONV=python2.7 FLAGS=--optimize=4
     - compiler: clang
       env: PYTHONV=python3 FLAGS=--installer
     - compiler: clang
       env: PYTHONV=python2.7 FLAGS=--override=STDFLOAT_DOUBLE=1
+    - compiler: gcc
+      env: PYTHONV=python2.7 FLAGS=--optimize=4
+      before_install:
+        - export CC=gcc-4.7
+        - export CXX=g++-4.7
 addons:
   apt:
+    sources:
+    - ubuntu-toolchain-r-test
     packages:
+    - gcc-4.7
+    - g++-4.7
     - bison
     - flex
     - libfreetype6-dev

dtool/src/dtoolbase/dtoolbase_cc.h

@@ -176,7 +176,7 @@ template<class T> typename remove_reference<T>::type &&move(T &&t) {
 #  if __has_extension(cxx_deleted_functions)
 #     define DELETED = delete
 #  endif
-#elif defined(__GNUC__) && (__cplusplus >= 201103L) // GCC
+#elif defined(__GNUC__) // GCC
 
 // Starting at GCC 4.4
 #  if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4)
@@ -191,12 +191,12 @@ template<class T> typename remove_reference<T>::type &&move(T &&t) {
 #    define CONSTEXPR constexpr
 #    define NOEXCEPT noexcept
 #    define USE_MOVE_SEMANTICS
-#    define FINAL final
 #    define MOVE(x) move(x)
 #  endif
 
 // Starting at GCC 4.7
 #  if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)
+#    define FINAL final
 #    define OVERRIDE override
 #  endif
 

makepanda/makepanda.py

@@ -1214,7 +1214,7 @@ def CompileCxx(obj,src,opts):
 
     if (COMPILER=="GCC"):
         if (src.endswith(".c")): cmd = GetCC() +' -fPIC -c -o ' + obj
-        else:                    cmd = GetCXX()+' -std=gnu++0x -ftemplate-depth-70 -fPIC -c -o ' + obj
+        else:                    cmd = GetCXX()+' -std=gnu++11 -ftemplate-depth-70 -fPIC -c -o ' + obj
         for (opt, dir) in INCDIRECTORIES:
             if (opt=="ALWAYS") or (opt in opts): cmd += ' -I' + BracketNameWithQuotes(dir)
         for (opt, dir) in FRAMEWORKDIRECTORIES: