QNX MIPS Support Patch

[Jeff Baker]

>>qnx_copy_rel.patch - This adds the R_MIPS_QNX_COPY reloc.  I left out 
>>the handling of that reloc in the BFD for a different patch.
> 
> Ok with a proper changelog entry.

Attached with a changelog.

>>qnx_shared_textrel.patch - This patch adds the --warn-shared-textrel 
>>option to the linker.  This option, oddly enough, warns when a 
>>DT_TEXTREL is being added to a shared object.
> 
> I can't approve this one.

Can't because it's not your area or can't because it's no good? 
Attached again with a changelog anyway.

>>- A patch to add general understanding of QNX MIPS as a target.

Attached as qnx_mips_target.patch along with the two new files 
(elf32lmipnto.sh, elf32bmipnto.sh).

>>- A patch to add QNX MIPS PIC handling to gas.
> 
> This one seems to replace nearly all occurences of mips_gp_register
> with a macro. It might be simpler to just change the initialization
> for QNX PIC.

Attached with your recommendation as qnx_gas_pic.patch.

- A patch to add support for QNX MIPS PIC to the BFD.

What is the accepted way of switching on our modifications without using 
the ifdefs (they were never meant to be permanent, I just don't know how 
else to do it yet)?
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