Having ascertained that the SDK itself has no (zero, zilch, nada) dependencies
on the standard C library, the NodeMCU linker script now puts any and all
libc functions into irom, rather than carefully picking the ones that
were used by NodeMCU some months ago. This should help keep iram free for
the things which really need to be in iram (such as ISRs).
Module creation & registration now made a lot simpler. In essence,
each module file is now self-contained and only needs a
NODEMCU_MODULE(MYNAME, "myname", myname_map, luaopen_myname);
line to both be automatically recognised by the Lua initialization
as well as honor the LUA_USE_MODULES_MYNAME #define.
This addresses the issue where a server would otherwise reject a valid
connection attempt from a rebooted node, due to the server thinking that
packet belonged to a recently closed session. By starting off the local
TCP port numbers at random* points each boot the risk of port reuse
across a reboot is significantly reduced.
*) As random as can be had via the lower 12 bits of the ccounter.
Renamed the main linker script to make it clear it is customised for NodeMCU
and not to be confused with the standard linker SDK linker scripts.
Changed to using the eagle.rom.addr.v6.ld file from the SDK.
Johny Mattsson
Johny Mattsson