a simple question about link

a simple question about link

[horseriver]

hi:

   if gcc do not specify a ld-script file for ld , which ld-script ld will use ?


   how ld select needed ld-script?


thanks!

Re: a simple question about link

[Игорь Пашев]

2013/1/10 horseriver <horserivers@gmail.com>:
> hi:
>
>    if gcc do not specify a ld-script file for ld , which ld-script ld will use ?
>
>
>    how ld select needed ld-script?


man ld
-Wl,<blah,blah,blah>

Re: a simple question about link

[nick clifton]

Hi horseriver,

>     if gcc do not specify a ld-script file for ld , which ld-script ld will use ?

The one that is built into the linker.  You can see this script by 
running the linker directly with the --verbose command line option 
specified.  Note - slightly different variations of this default linker 
script are used when other command line options are also passed to the 
linker, eg -N and -r.  See the source file ld/genscripts.sh for more 
details on this.

Cheers
   Nick

Re: a simple question about link

[horseriver]

On Thu, Jan 10, 2013 at 10:06:54AM +0000, nick clifton wrote:
> Hi horseriver,
> 
> >    if gcc do not specify a ld-script file for ld , which ld-script ld will use ?
> 
> The one that is built into the linker.  
  
  Thanks!

  After installing ld , there is a folder named  "ldscripts"  under  ld's home directory , which can be set by --prefix configure option .
  
  Under /usr/lib folder , there is also  a folder named  "ldscripts" .

  what is the difference between them ?  ld will use which ?

  

>  You can see this script by
> running the linker directly with the --verbose command line option
> specified.  Note - slightly different variations of this default
> linker script are used when other command line options are also
> passed to the linker, eg -N and -r.  See the source file
> ld/genscripts.sh for more details on this.
> 
> Cheers
>   Nick
> 
> 
> 

Re: a simple question about link

[nick clifton]

Hi horseriver,

> After installing ld , there is a folder named "ldscripts" under
> ld's home directory , which can be set by --prefix configure option .
> Under /usr/lib folder , there is also  a folder named  "ldscripts" .
>  what is the difference between them ?

/usr/lib/ldscripts belongs to the system linker (ie /bin/ld).

<prefix>/lib/ldscripts belongs to the linker that you installed into 
<prefix>, ie <prefix>/bin/ld.


> ld will use which ?

Neither. :-)  It will use the versions of these scripts that are built 
directly into the ld binary itself.  Try running strings on the ld 
executable to see this.

Cheers
   Nick