-Wall on gcc8 otherwise warns without -Wno-cast-function-type but older
GCCs/CLang choke on that argument:
error: unknown warning option '-Wno-cast-function-type'; did you mean
'-Wno-bad-function-cast'? [-Werror,-Wunknown-warning-option]
This adds 24 byte to the binary, as some functions are now called with
additional dummy arguments:
"Pushing and popping garbage to keep the system happy"