Compiling newlib for the msp430x architecture

[Stephan <stefel at gmx dot net>]

Hello,

I failed to compile newlib for with the msp430x architecture with 92kB 
Flash.

Trying to compile newlib (in my case for the MSP430F2617) with the large 
memory model (20bit pointers) failed for me because the Make-System 
automatically injected the -mcpu=msp430 into the gcc flags. This gives 
me the following warning:

> ../../../../../../newlib/libc/argz/dummy.c:1:0: warning: MCU 
'msp430f2617' supports 430X ISA but -mcpu option is set to 430

because in order to get the large memory addressing instructions you 
need to set -mlarge which requires the -mmcu=msp430f2617 option.

I tried to debug this as i thought it was my fault but it turns out that 
some Makefile extracts the -mcpu=msp430 option from the

$ msp430-elf-gcc /* couple of -L and -B's */ --print-multi-lib

command. According to the GCC manpage this option is deprecated and 
-mmcu= should be used instead.

I'm not sure if I am missing something here or if this is really a bug 
in the make system which is why I am asking here.

Thanks, Stephan