You might try to move one of them out of the way and replace it by (a link 
to ?) the other, to see what happens

   - when you use Sage
   - when you use some software on your system using libreadline


The result(s) may help to determine the "right" tqrget for debugging the 
problem.

HTH,

--
Emmanuel Charpentier

Le mercredi 30 août 2017 00:27:14 UTC+2, [email protected] a écrit :
>
> Thanks, Emmanuel.
>
> Indeed, ldconfig -p gives the following: "libreadline.so.6 (libc6,x86-64) 
> => /lib64/libreadline.so.6". The latter is a symbolic link to 
> /lib64/libreadline.so.6.3, owned by root.
> In the folder ~/Development/sage/local/lib/, ./libreadline.so.6 is a 
> symbolic link to ./libreadline.so.6.3 (owned by rllozes), as expected.
>
> So, I have two symlinks, both presumably visible(?) and both pointing to 
> valid, versioned libraries. How would that confuse the make? I don't find 
> any other similarly named files. 
>
>  - Richard
>
> On Tuesday, August 29, 2017 at 6:11:30 AM UTC-7, Emmanuel Charpentier 
> wrote:
>>
>> In the three cases, the culprit is the unexpected message :
>>
>> sh: /home/rllozes/Development/sage/local/lib/libreadline.so.6: no version 
>> information available (required by sh)
>>
>>
>> Do you have an unexpected libreadline in your library path ?
>>
>>  ...
>>
>

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