Newlib compilation broken for ARMv6-M

[Dirk Behme]

I try to build newlib 1.16 with arm-none-eabi-gcc 4.2.3 (Sourcery G++ 
Lite 2008q1-126). This is able to compile code for ARMv6-M. Newlib 
configuration with this results in

MULTIDIRS = thumb thumb2 armv6-m

With this, I get the following errors:

While compiling with -mthumb -march=armv7:

newlib-1.16.0/newlib/libc/machine/arm/setjmp.S:123: Error: SP not 
allowed in register list -- `stmea a1!,{v1-v7,fp,ip,sp,lr}'
newlib-1.16.0/newlib/libc/machine/arm/setjmp.S:145: Error: SP not 
allowed in register list -- `ldmfd a1!,{v1-v7,fp,ip,sp,lr}'

While compiling with -mthumb -march=armv6-m:

newlib-1.16.0/newlib/libc/sys/arm/trap.S:88: Error: lo register 
required -- `sub ip,sp,ip'

newlib-1.16.0/newlib/libc/sys/arm/crt0.S:30: Error: selected processor 
does not support ARM opcodes
newlib-1.16.0/newlib/libc/sys/arm/crt0.S:57: Error: attempt to use an 
ARM instruction on a Thumb-only processor -- `mov r0,#0x16'
newlib-1.16.0/newlib/libc/sys/arm/crt0.S:58: Error: attempt to use an 
ARM instruction on a Thumb-only processor -- `adr r1,.LC0'
...

newlib-1.16.0/newlib/libc/machine/arm/setjmp.S:123: Error: attempt to 
use an ARM instruction on a Thumb-only processor -- `stmea 
a1!,{v1-v7,fp,ip,lr}'
newlib-1.16.0/newlib/libc/machine/arm/setjmp.S:132: Error: attempt to 
use an ARM instruction on a Thumb-only processor -- `mov a1,#0'
...

and some more similiar errors.

Note that I don't need ARMv6-M newlib, therefore I just disabled the 
broken parts. I just want to compile newlib with this compiler for 
ARM9 processor. To get this working, I used hack in attachment. It's 
mainly wrong, but I want to get things compiling. Maybe it helps for 
proper fixing.

Dirk

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