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@@ -88,7 +88,7 @@ AS_IF([test "x${ac_cv_env_CXXFLAGS_set}" = "x"],[
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# Protocol Buffers contains several checks that are intended to be used only
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# for debugging and which might hurt performance. Most users are probably
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# end users who don't want these checks, so add -DNDEBUG by default.
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- CXXFLAGS="$CXXFLAGS -DNDEBUG"
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+ CXXFLAGS="$CXXFLAGS -std=c++11 -DNDEBUG"
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AC_MSG_RESULT([use default: $PROTOBUF_OPT_FLAG $CXXFLAGS])
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],[
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@@ -207,7 +207,7 @@ case "$target_os" in
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esac
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AM_CONDITIONAL([OBJC_CONFORMANCE_TEST], [test $OBJC_CONFORMANCE_TEST = 1])
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-AX_CXX_COMPILE_STDCXX([11], [noext], [optional])
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+AX_CXX_COMPILE_STDCXX([11], [noext], [mandatory])
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# HACK: Make gmock's configure script pick up our copy of CFLAGS and CXXFLAGS,
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# since the flags added by ACX_CHECK_SUNCC must be used when compiling gmock
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Adam Cozzette