This commit provides the appropriate external symbol addresses to let
the "random" example natmod build for the Xtensa platform.
On the ESP8266, signed integer division code isn't provided as part of
libgcc.a, libm.a, or libc.a, but it is instead provided by the ROM.
Regular builds inject the appropriate symbol addresses as part of the
linking process (see eagle.rom.addr.v6.ld), but natmods need this
information brought in from somewhere else.
Signed-off-by: Alessandro Gatti <a.gatti@frob.it>
This commit adds support for RV32IMC native modules, as in embedding native
code into a self-contained MPY module and and make its exported functions
available to the MicroPython environment.
Signed-off-by: Alessandro Gatti <a.gatti@frob.it>