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Re: [Bug-readline] [PATCH] Enable visibility annotations

From: Chet Ramey
Subject: Re: [Bug-readline] [PATCH] Enable visibility annotations
Date: Thu, 14 Apr 2016 10:59:25 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Thunderbird/38.7.2

On 4/14/16 6:47 AM, Pedro Alves wrote:

> FYI, this is probably doing to break (at least) gdb against system 
> readline.  gdb relies on accessing a few private readline symbols...  :-/
> E.g.:
> tui/tui-io.c:437:  extern int _rl_echoing_p;
> completer.c:1677:  extern int _rl_complete_mark_directories;
> completer.c:1770:extern int _rl_completion_prefix_display_length;
> completer.c:1771:extern int _rl_print_completions_horizontally;
> Unless/until someone fixes these and adds the missing public APIs
> to readline, 

These aren't exactly the result of `missing public APIs'.  echoing_p is
a saved value indicating whether or not the terminal flags readline
inherits include ECHO -- something an application can easily check for

The others are values for settable variables and should be retrieved
using rl_variable_value (variable_name).  Since it returns a string,
you can use the public macro RL_BOOLEAN_VARIABLE_VALUE to turn it into
an int.

Bash doesn't use any _rl_ readline symbols, so I know it can be done.

``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/

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