Hello!I can not start apache server on slackware 11.
The problem:/etc/rc.d/rc.httpd start
/usr/sbin/httpd: /lib/libpthread.so.0: version `GLIBC_2.4' not found (required by /usr/lib/libapr-1.so.0)

I'm a little surprised, because AFAIK Slackware 11 include glibc-2.3.6, not glibc-2.4

Did you make a clean install "from scratch" of Slackware 11.0, in other words are you sure all your packages, including apr, come from Slackware 11.0 ?

Please send the output of following commands:

ls -l /var/log/packages|grep apr
ls -l /var/log/packages|grep glibc
ls -l /var/log/packages|grep httpd

Is your apache from the Slackware 11 distro? Did you get it somewhere else? Did you build it or install from pre-built package?

that is the result:

ls -l /var/log/packages/ | grep apr
-rw-r--r-- 1 root root 2198 2008-12-26 19:04 apr-1.3.3-i486-1
-rw-r--r-- 1 root root 2088 2008-12-26 19:05 apr-util-1.3.4-i486-1
root@shibox:~# ls -l /var/log/packages/ | grep glibc
-rw-r--r-- 1 root root 272894 1999-01-27 21:35 glibc-2.3.6-i486-6
-rw-r--r-- 1 root root 186883 1999-01-27 21:36 glibc-i18n-2.3.6-noarch-6
-rw-r--r-- 1 root root 1024 1999-01-27 21:36 glibc-profile-2.3.6-i486-6
-rw-r--r-- 1 root root 7260 1999-01-27 21:22 glibc-solibs-2.3.6-i486-6
-rw-r--r-- 1 root root 65934 1999-01-27 21:22 glibc-zoneinfo-2.3.6-noarch-6
root@shibox:~# ls -l /var/log/packages/ | grep httpd
-rw-r--r-- 1 root root 24546 2008-12-26 17:50 httpd-2.2.10-i486-1

Your system doesn't seem to be consistent :
apr-1.3.3-i486-1 and apr-util-1.3.4-i486-1 are included in release 12.2
all the glibc-* package are included in release 11.0
httpd-2.2.10-i486-1 is included in release 12.2

So you have packages coming from different releases. This won't work.

If *really* you installed slackware 11.0 at first, the only reason for that situation I can think of right now is an update/upgrade using slackpkg, where you would have uncommented a slackware 12.2 mirror instead of a slackware 11.0 one in the file /etc/slackpkg/mirrors -- but then I'm confused because in a slackware 11.0 distro this file doesn't include mirror addresses for 12.0 release...

Could you check please check that and/or send us a copy of the uncommented line in /etc/slackpkg/mirrors ?

Now if you didn't use slackpkg to keep your system up to date, how did you install apr and httpd ?