Any objection to disabling warnings for C99 features?

[4/19] Building CXX object tools/lldb/…nPlatformLinux.dir/PlatformLinux.cpp.o
/usr/local/google/home/vharron/ll/tot/llvm/tools/lldb/source/Plugins/Platform/Linux/PlatformLinux.cpp:67:15: warning: designated initializers are a C99 feature [-Wc99-extensions]
{ .name = “use-llgs-for-local” , OptionValue::eTypeBoolean, true, true, NULL, NULL, “Control whether the platform uses llgs for local debug sessions.” },
^~~~~~~~~~~~~~~~~~~~~~~~~~~~