From 39d2f703b8c9ea58163e38f711a0c6c2d6b49c7c Mon Sep 17 00:00:00 2001 From: Adam Cozzette Date: Thu, 31 May 2018 10:07:28 -0700 Subject: Require C++11 and pass -std=c++11 This commit updates the Autotools build to require a C++11 compiler and explicitly pass -std=c++11. This seems to be necessary for enabling C++11 support in older compilers. --- configure.ac | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/configure.ac b/configure.ac index 08f98d3b..aec10cfa 100644 --- a/configure.ac +++ b/configure.ac @@ -88,7 +88,7 @@ AS_IF([test "x${ac_cv_env_CXXFLAGS_set}" = "x"],[ # Protocol Buffers contains several checks that are intended to be used only # for debugging and which might hurt performance. Most users are probably # end users who don't want these checks, so add -DNDEBUG by default. - CXXFLAGS="$CXXFLAGS -DNDEBUG" + CXXFLAGS="$CXXFLAGS -std=c++11 -DNDEBUG" AC_MSG_RESULT([use default: $PROTOBUF_OPT_FLAG $CXXFLAGS]) ],[ @@ -207,7 +207,7 @@ case "$target_os" in esac AM_CONDITIONAL([OBJC_CONFORMANCE_TEST], [test $OBJC_CONFORMANCE_TEST = 1]) -AX_CXX_COMPILE_STDCXX([11], [noext], [optional]) +AX_CXX_COMPILE_STDCXX([11], [noext], [mandatory]) # HACK: Make gmock's configure script pick up our copy of CFLAGS and CXXFLAGS, # since the flags added by ACX_CHECK_SUNCC must be used when compiling gmock -- cgit v1.2.3