[ia64] objcopy and constant-gp

[Tristan Gingold]

On Nov 12, 2007, at 9:36 AM, Jakub Jermar wrote:
> the following stopped working for me in ia64 binutils 2.18:
>
> 1. I have a binary file and want to objcopy it from the binary  
> format to elf64-ia64-little, creating one ELF section in it, the  
> result is called empty.o
> 2. I want to link empty.o with other .o files that were compiled  
> with -mconstant-gp
> 3. ld returns an error complaining about linking constant-gp and  
> non-constant-gp object files
>
> So I would like to know if you consider this a regression or if it  
> is actually a feature or a fix introduced in the newest version.
>
> Anyway, what I am now most concerned about is if there is a  
> straightforward way to specify that empty.o should be constructed  
> with the constant-gp flag. (There is an easy workaround for this:  
> after objcopy, patch the ELF file manually and set the constant-gp  
> bit using some hex editor).

This behaviour sounds reasonable.

You'd better to create empty.s which .incbin (see gas manual) the  
binary file.  Then you assemble empty.s
using the right options (--mconstant-gp).
The link should be successful.

Tristan.