In file included from /in/Compile/dlist_pre.cpp:2:
In file included from /in/Compile/dlist.h:78:
/in/dlist_impl.h:133:9: error: designated initializers are a C99 feature [-Werror,-Wc99-extensions]
        .prev = nullptr,
        ^~~~~~~~~~~~~~~
/in/dlist_impl.h:134:9: error: designated initializers are a C99 feature [-Werror,-Wc99-extensions]
        .next = nullptr,
        ^~~~~~~~~~~~~~~
/in/dlist_impl.h:135:9: error: designated initializers are a C99 feature [-Werror,-Wc99-extensions]
        .op = nullptr
        ^~~~~~~~~~~~~
3 errors generated.
/in/Compile/Makefile:29: recipe for target 'buildDlistPretest' failed
make: *** [buildDlistPretest] Error 1