Serial buffer size unchangeable

[maxgerhardt]

Per #651 (comment).

Due to the #undef construct done in

ArduinoCore-samd/cores/arduino/Uart.h

Lines 25 to 29 in a5d52db

	#ifdef SERIAL_BUFFER_SIZE
	#undef SERIAL_BUFFER_SIZE
	#endif
	#define SERIAL_BUFFER_SIZE 256

it's not possible to set a global -DSERIAL_BUFFER_SIZE=... value and have it be use used anymore.

A user has a usecase for that here.

[Muny]

Agreed, it was pretty deleterious to add those.

[maxgerhardt]

Still seems like the amount of people that care about this is exactly 0.

[Muny]

Still seems like the amount of people that care about this is exactly 0.

I presume it's because the people who do care about it find ways to work around it. I ended up adding a pre-build step to my project to patch this file.