LD_DEBUG coolness

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1. LD_DEBUG coolness
   
2. Wed, 15 Oct 2003 15:50:50 -0600
   
3. Jason Creighton (androflux from softhome.net)
   
4. 
   
5. Hi,
   
6. 
   
7. I was reading comp.unix.programmer and came across a comment about setting the LD_DEBUG environmental varible to 'help' and running a dynamic executable. Okay, let's try it:
   
8. 
   
9. ~$ export LD_DEBUG=help
   
10. ~$ ls
    
11. Valid options for the LD_DEBUG environment variable are:
    
12. 
    
13.   libs        display library search paths
    
14.   reloc       display relocation processing
    
15.   files       display progress for input file
    
16.   symbols     display symbol table processing
    
17.   bindings    display information about symbol binding
    
18.   versions    display version dependencies
    
19.   all         all previous options combined
    
20.   statistics  display relocation statistics
    
21.   help        display this help message and exit
    
22. 
    
23. To direct the debugging output into a file instead of standard output
    
24. a filename can be specified using the LD_DEBUG_OUTPUT environment variable.
    
25. 
    
26. See attached ls_output.txt
    
27. 
    
28. Fun thing to play with. And who knows, I might actually have a use for it someday.
    
29. 
    
30.     [Ben]
    
31. 
    
32.     *Nice!*
    
33. 
    
34.     Thanks, Jason - that's a really fine tidbit. It now reposes comfortably in my toolbox in the little niche by "strace" and keeps it from rolling around and rattling. I've spent the past week teaching people how to use the "grep" drill, the "awk" chopsaw, and the "sed" jackhammer, and can appreciate the finesse of a precision instrument all the more for that reason...

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http://linuxgazette.net/issue96/lg_tips.html#tips.3