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libcpp/ * lex.c (lex_string): Add -Wc++11-compat warning. * include/cpplib.h: Add CPP_W_CXX11_COMPAT. (struct cpp_options): Add cpp_warn_cxx11_compat. * init.c (cpp_create_reader): Initialize it. gcc/c-family/ * c.opt (Wc++0x-compat): Set it. From-SVN: r222961