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List: postgresql-admin
Subject: [ADMIN] Strange thing : ldconfig and libpq.so.2.1
From: Richard NAGY <richard () presenceweb ! com>
Date: 2001-12-11 15:26:46
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Hello,
Well, I have a strange problem on linux (Red Hat 6.2). When I type this
command line :
/sbin/ldconfig -p | grep libpq
I have this result :
libpq.so.2 (libc6) => /usr/local/pgsql/lib/libpq.so.2
libpq.so (libc6) => /usr/local/pgsql/lib/libpq.so
One night before on the same machine and at this time on an other one,
we have this :
libpq.so.2.1 (libc6) => /usr/local/pgsql/lib/libpq.so.2.1
libpq.so.2 (libc6) => /usr/local/pgsql/lib/libpq.so.2
libpq.so (libc6) => /usr/local/pgsql/lib/libpq.so
One line has disappeared. The one with libpq.so.2.1.
So, many programs don't work any more.
Ex :
On one machine :
ldd /usr/local/pgsql/bin/psql
The result is :
libpq.so.2.1 => /usr/local/pgsql/lib/libpq.so.2.1 (0x4001a000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0x40028000)
libnsl.so.1 => /lib/libnsl.so.1 (0x40055000)
libdl.so.2 => /lib/libdl.so.2 (0x4006b000)
libm.so.6 => /lib/libm.so.6 (0x40070000)
libutil.so.1 => /lib/libutil.so.1 (0x4008d000)
libreadline.so.3 => /usr/lib/libreadline.so.3 (0x40090000)
libtermcap.so.2 => /lib/libtermcap.so.2 (0x400b4000)
libncurses.so.4 => /usr/lib/libncurses.so.4 (0x400b8000)
libc.so.6 => /lib/libc.so.6 (0x400fa000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
On an other machine, the result is :
libpq.so.2 => /usr/local/pgsql/lib/libpq.so.2 (0x40015000)
libz.so.1 => /usr/lib/libz.so.1 (0x4002a000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0x40039000)
libresolv.so.2 => /lib/libresolv.so.2 (0x40066000)
libnsl.so.1 => /lib/libnsl.so.1 (0x40076000)
libdl.so.2 => /lib/libdl.so.2 (0x4008c000)
libm.so.6 => /lib/libm.so.6 (0x40090000)
libreadline.so.3 => /usr/lib/libreadline.so.3 (0x400ad000)
libc.so.6 => /lib/libc.so.6 (0x400d1000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
libtermcap.so.2 => /lib/libtermcap.so.2 (0x401c6000)
We can see that libpq.so.2.1 is not used directly in this second case.
But, psql works well in each case.
The problem comes with our own programs.
For our programs :
ldd /path/to/my/program/my_program
libpq.so.2.1 => not found
libc.so.6 => /lib/libc.so.6 (0x4001c000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
I have a "not found". So, our programs don't work any more!! (They were
compiled on the first machine and afterwards copied on the second one)
The strange thing is that it worked a few days ago on the second
machine! I don't know how to restore a stable state.
How can I correct this ?
In the ldconfig man page, I have seen the -l flag but should I use it
and how ?
I would appreciate a little help.
PS : I have typed the /sbin/ldconfig command line with the good
/etc/ld.so.conf but I still have the problem.
Thank you
Regards.
--
Richard NAGY
Presenceweb / Nameshield
[Attachment #3 (text/html)]
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
Hello,
<p>Well, I have a strange problem on linux (Red Hat 6.2). When I type this
command line :
<p>/sbin/ldconfig -p | grep libpq
<p>I have this result :
<br>libpq.so.2 (libc6) => /usr/local/pgsql/lib/libpq.so.2
<br>libpq.so (libc6) => /usr/local/pgsql/lib/libpq.so
<p>One night before on the same machine and at this time on an other one,
we have this :
<p>libpq.so.2.1 (libc6) => /usr/local/pgsql/lib/libpq.so.2.1
<br>libpq.so.2 (libc6) => /usr/local/pgsql/lib/libpq.so.2
<br>libpq.so (libc6) => /usr/local/pgsql/lib/libpq.so
<p>One line has disappeared. The one with libpq.so.2.1.
<br>So, many programs don't work any more.
<p>Ex :
<br>On one machine :
<br>ldd /usr/local/pgsql/bin/psql
<br>The result is :
<br> libpq.so.2.1 => /usr/local/pgsql/lib/libpq.so.2.1
(0x4001a000)
<br> libcrypt.so.1 => /lib/libcrypt.so.1
(0x40028000)
<br> libnsl.so.1 => /lib/libnsl.so.1
(0x40055000)
<br> libdl.so.2 => /lib/libdl.so.2
(0x4006b000)
<br> libm.so.6 => /lib/libm.so.6
(0x40070000)
<br> libutil.so.1 => /lib/libutil.so.1
(0x4008d000)
<br> libreadline.so.3 => /usr/lib/libreadline.so.3
(0x40090000)
<br> libtermcap.so.2 => /lib/libtermcap.so.2
(0x400b4000)
<br> libncurses.so.4 => /usr/lib/libncurses.so.4
(0x400b8000)
<br> libc.so.6 => /lib/libc.so.6
(0x400fa000)
<br> /lib/ld-linux.so.2 => /lib/ld-linux.so.2
(0x40000000)
<p>On an other machine, the result is :
<br> libpq.so.2 => /usr/local/pgsql/lib/libpq.so.2
(0x40015000)
<br> libz.so.1 => /usr/lib/libz.so.1
(0x4002a000)
<br> libcrypt.so.1 => /lib/libcrypt.so.1
(0x40039000)
<br> libresolv.so.2 => /lib/libresolv.so.2
(0x40066000)
<br> libnsl.so.1 => /lib/libnsl.so.1
(0x40076000)
<br> libdl.so.2 => /lib/libdl.so.2
(0x4008c000)
<br> libm.so.6 => /lib/libm.so.6
(0x40090000)
<br> libreadline.so.3 => /usr/lib/libreadline.so.3
(0x400ad000)
<br> libc.so.6 => /lib/libc.so.6
(0x400d1000)
<br> /lib/ld-linux.so.2 => /lib/ld-linux.so.2
(0x40000000)
<br> libtermcap.so.2 => /lib/libtermcap.so.2
(0x401c6000)
<p>We can see that libpq.so.2.1 is not used directly in this second case.
But, psql works well in each case.
<br>The problem comes with our own programs.
<p>For our programs :
<br>ldd /path/to/my/program/my_program
<br> libpq.so.2.1 => not found
<br> libc.so.6 => /lib/libc.so.6
(0x4001c000)
<br> /lib/ld-linux.so.2 => /lib/ld-linux.so.2
(0x40000000)
<p>I have a "not found". So, our programs don't work any more!! (They were
compiled on the first machine and afterwards copied on the second one)
<br>The strange thing is that it worked a few days ago on the second machine!
I don't know how to restore a stable state.
<br>
<p>How can I correct this ?
<br>In the ldconfig man page, I have seen the -l flag but should I use
it and how ?
<p>I would appreciate a little help.
<p>PS : I have typed the /sbin/ldconfig command line with the good /etc/ld.so.conf
but I still have the problem.
<p>Thank you
<br>Regards.
<pre>--
Richard NAGY
Presenceweb / Nameshield</pre>
</html>
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