Re: [Bug-readline] libreadline.so has rl_sort_completion_matche instead of rl_sort_completion_matches

[Volker Braun]

On Thu, 25 Jul 2013 15:11:13 -0400, Sébastien Boisvert wrote:
> (4) a description of the bug
> 
>    libreadline.so has rl_sort_completion_matche instead of
>    rl_sort_completion_matches
> 
> $ readelf -s 1/lib/libreadline.so|grep rl_sort_completion_matche
>     511: 000000000023fca8     4 OBJECT  GLOBAL DEFAULT   23
>     rl_sort_completion_matche 488: 000000000023fca8     4 OBJECT  GLOBAL
>     DEFAULT   23 rl_sort_completion_matche
> 
> The header has the correct name (with a s):
> 
> $ grep rl_sort_completion_matche 1/include/readline/readline.h extern
> int rl_sort_completion_matches;


This is not a bug. Use --wide to get non-truncated output from readelf:


address@hidden:~/Sage/sage$ readelf -s local/lib/libreadline.so|grep 
rl_sort_completion_matche
   576: 00000000002425c8     4 OBJECT  GLOBAL DEFAULT   22 
rl_sort_completion_matche
   966: 00000000002425c8     4 OBJECT  GLOBAL DEFAULT   22 
rl_sort_completion_matche
address@hidden:~/Sage/sage$ readelf -s --wide local/lib/libreadline.so|grep 
rl_sort_completion_matche
   576: 00000000002425c8     4 OBJECT  GLOBAL DEFAULT   22 
rl_sort_completion_matches
   966: 00000000002425c8     4 OBJECT  GLOBAL DEFAULT   22 
rl_sort_completion_matches


> (6) A fix for the bug if you have one!
> 
> To compile R 3.0.1, I removed the use of this symbol in the R code:
> 
> sed -i 's>rl_sort_completion_matches = 0;>>g' src/unix/sys-std.c


This is a bug in R where R is using readline symbols without linking 
against readline (-lreadline). Some older toolchains were more forgiving, 
but nowadays this is an error.