Configure conformance tests to build with C++11 (require GCC 4.8)

[skip ci]

1 files changed, 7 insertions, 0 deletions

diff --git a/travis.sh b/travis.sh
index e7667fbc..317bef4e 100755
--- a/travis.sh
+++ b/travis.sh
@@ -11,6 +11,13 @@
 # For when some other test needs the C++ main build, including protoc and
 # libprotobuf.
 internal_build_cpp() {
+  # Install GCC 4.8 to replace the default GCC 4.6. We need 4.8 for more
+  # decent C++ 11 support in order to compile conformance tests.
+  sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
+  sudo apt-get update -qq
+  sudo apt-get install -qq g++-4.8
+  export CXX="g++-4.8" CC="gcc-4.8"
+
   ./autogen.sh
   ./configure
   make -j2