rtl for avr and sh

[Peng Fan]

hi,
I do not have a stable internet connection now and  was often dropped on
the IRC, so I asked here.

1.
I am tring to make rtl run on avrtest and shsim bsp, but I found that they
have small ram with avr 64KB and shsim 256KB. I am not sure whether it is
needed to do this or not.
2.
 I compiled rtems for avr, but the compilation failed.
The configure command is :
../rtems/configure --prefix=/opt/rtems-4.11 --target=avr-rtems4.11
--enable-tests=samples
The following is the error message.
../../../../../../temp-rtems/c/src/../../cpukit/libblock/src/flashdisk.c:
In function 'rtems_fdisk_recycle_segment':
../../../../../../temp-rtems/c/src/../../cpukit/libblock/src/flashdisk.c:1392:1:
error: unable to find a register to spill in class 'POINTER_REGS'
 }
 ^
../../../../../../temp-rtems/c/src/../../cpukit/libblock/src/flashdisk.c:1392:1:
error: this is the insn:
(insn 382 381 383 19 (set (reg:HI 26 r26)
        (reg/v/f:HI 69 [ dpd ]))
../../../../../../temp-rtems/c/src/../../cpukit/libblock/src/flashdisk.c:1321
82 {*movhi}
     (nil))
../../../../../../temp-rtems/c/src/../../cpukit/libblock/src/flashdisk.c:1392:
confused by earlier errors, bailing out
gmake[5]: *** [src/flashdisk.o] Error 1
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