Python RAP and Reloc related for RTL

[Peng Fan]

Hi,

Create this new thread to talk about this topic and the reloc related.

1.
As you suggested, I have compiled toolchain for arm using option
`-mlong-calls` on arm realview qemu platform, and now the python.rap file
can be correctly loaded and python interpreter can run the xxx.py in
startup like this `rap ld ./python-library.rap  tmp a.py`.
A small hack should be done is about gcc search dirs. I'll try to fix this
later.

Another issue is that, when python rap is loaded without and py file passed
to it, it can not respond to input. The msg output is :

RTEMS SHELL (Ver.1.0-FRC):/dev/console. Aug  3 2014. 'help' to list
commands.
[/] # rap ld ./python-library.rap
rtl: loading './python-library.rap'
rtl: rap: input machine=0
rtl: rap: machinetype=40
rtl: rap: datatype=1
rtl: rap: class=1
rtl: rap: input header=12
rtl: rap: load: symtab=16068 (1339) strtab=23867 relocs=0
rtl: rap: input .text=32948
rtl: rap: input .const=1088028
rtl: rap: input .data=1233652
rtl: rap: input symbols=1465241
rtl: rap: input relocs=1505176
Could not find platform independent libraries <prefix>
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
Python 2.7.8 (default, Aug  3 2014, 21:17:53)
[GCC 4.8.3 20140522 (RTEMS
4.11-RSB-7c46699472b0d0adea2010f735722e2610c8c6ae-1, on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>

It does not respond to input, any ideas about this?

2. I have not tried on sparc sis, because it's memory is small. How to
modify it's memory size in sis-gdb?

Regards,
Peng.
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