Configure conformance tests to build with C++11 (require GCC 4.8)
[skip ci]
diff --git a/conformance/Makefile.am b/conformance/Makefile.am
index 3c97340..c3551a4 100644
--- a/conformance/Makefile.am
+++ b/conformance/Makefile.am
@@ -21,6 +21,7 @@
third_party/jsoncpp/jsoncpp.cpp
nodist_conformance_test_runner_SOURCES = conformance.pb.cc
conformance_test_runner_CPPFLAGS = -I$(top_srcdir)/src -I$(srcdir)
+conformance_test_runner_CXXFLAGS = -std=c++11
# Explicit deps beacuse BUILT_SOURCES are only done before a "make all/check"
# so a direct "make test_cpp" could fail if parallel enough.
conformance_test_runner-conformance_test.$(OBJEXT): conformance.pb.h
diff --git a/travis.sh b/travis.sh
index e7667fb..317bef4 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
