-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"
It's a global symbol and LTO will complain if the one in this file and
the one in EFM32 target are inconsistent.
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
This is will make debugging earier if this does happen, rather than
dereferencing the null pointer (or passing it to memcpy, or worse).
blackmagic PR #475