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Old 01-06-2010, 12:46 PM   #1
agrume
LQ Newbie
 
Registered: Jun 2006
Posts: 4

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Thumbs down Shared libraries - ldd - cmov


Hi to all

Question about shared libraries dependancies & ldd :

Lets find dependancies for /bin/echo :

$ldd /bin/echo
linux-gate.so.1 => (0xb7f70000)
libc.so.6 => /lib/i686/cmov/libc.so.6 (0xb7e01000)
/lib/ld-linux.so.2 (0xb7f71000)

Lets focus on libc6 :

$ls -al /lib/libc*
...
...
1294572 2008-11-04 21:47 /lib/libc-2.7.so
11 2008-12-28 14:55 /lib/libc.so.6 -> libc-2.7.so
...
...

$ls -al /lib/i686/cmov/libc*
...
...
1413540 2008-11-04 21:48 /lib/i686/cmov/libc-2.7.so
11 2008-12-28 14:55 /lib/i686/cmov/libc.so.6 -> libc-2.7.so
...
...

What is this directory /lib/i686/cmov ?
How does ldd to link /lib/libc.so.6 to /lib/i686/cmov/libc.so.6 ?
Why having 2 libc6 on the system ( files have different sizes, so are different ) ?

If anyone knows...
 
Old 01-06-2010, 04:40 PM   #2
knudfl
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Registered: Jan 2008
Location: Copenhagen DK
Distribution: PCLinuxOS2020 CentOS6.10 CentOS7.7 + 50+ other Linux OS, for test only.
Posts: 17,381

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Welcome to LQ.

Debian 5 Lenny ?
You have two different libc6 packages installed :

1) package name : libc6 : /lib/libc-2.7.so , /lib/libc.so.6
http://packages.debian.org/lenny/i38...-i686/filelist

2) package name : libc6-686 : /lib/i686/cmov/libc-2.7.so ,
/lib/i686/cmov/libc.so.6
http://packages.debian.org/lenny/libc6-i686
QUOTE : "" This set of libraries is optimized for i686 machines,
and will only be used if ...... ""
http://packages.debian.org/lenny/i386/libc6/filelist

.. Or use : dpkg -L <package-name>
.. to get a file list.
.....

http://www.linuxquestions.org/linux/...Ask_a_Question
http://linuxsilo.net/docs/smart-questions_en.html
.....

Last edited by knudfl; 01-06-2010 at 04:43 PM.
 
Old 01-06-2010, 05:02 PM   #3
agrume
LQ Newbie
 
Registered: Jun 2006
Posts: 4

Original Poster
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Thanx !

Effectively its Lenny...
 
  


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