warning: _close is not implemented and will always fail
in function `_close_r': warning: _close is not implemented and will always fail
Unrealfeathers' Blog
gd32f10x_enet.h: 'enet_default_init' declared 'static' but never defined [-Wunused-function]
'enet_default_init' declared 'static' but never defined [-Wunused-function] 'enet_delay' declared 'static' but never defined [-Wunused-function]