Re: objcopy fix (for x86_64)

[Christian Franke <Christian.Franke@t-online.de>]

Pavel Roskin wrote:
> On Tue, 2007-11-27 at 12:57 +0100, Robert Millan wrote:
>   
>>>> 	* aclocal.m4 (grub_PROG_OBJCOPY_ABSOLUTE): Pass `--only-section=.text'
>>>> 	to objcopy.
>>>>         
>>> Looks fine to me.
>>>       
>> Uhm actually, I suppose one would need this argument in two separate places
>> (the test, and the real thing), which I missed.
>>     
>
> It won't work "in the real thing".  There are more sections than
> just .text that need to be preserved.
>
> In any case, it will be in the yet to be written conf/x86_64-pc.mk
>
> We need to find the real reason behind grub_PROG_OBJCOPY_ABSOLUTE and
> relax the test to only find the original problem without impeding new
> ports.
>
>   

The reason for the failing objcopy test may be an unsupported or 
unsuitable "-N" linker option. The linker possibly adds constant bytes 
to some section.

Examining the builtin linker script ("ld -N --verbose") may be helpful 
to track down the problem.

If this script does not work, it can be replaced by a target specific 
version selected by configure. See "[PATCH] Build on Cygwin" for a 
working example.

Christian