kdevelop 1.2: undefined versioned symbol name clog@@GLIBC_2.1

[Alexander Zvyagin]

Dear KDevelop team,

I tried to compile kdevelop 1.2 on Linux Slackware-7.0 (glibc 2.1). I got
this message:

make[2]: Entering directory
`/home/zvyagin/packets/kdevelop-1.2/kdlgloader'
/bin/sh ../libtool --mode=link g++  -O2 -fno-exceptions -fno-rtti
-fno-check-new -frtti  -s -o libkdlgloader.la -rpath /opt/kde/lib
-L/usr/X11R6/lib -L/opt/kde/lib  -no-undefined -version-info 1:0 -s
kdlgldr.lo kdlgldr_itemstuff.lo kdlgptrdb.lo -lkdeui -lkdecore -lXext -lqt
-lpng -lz -lm -lXext -lX11   -lXext  -lqt -lpng -lz -lm -lXext -lX11   
rm -fr .libs/libkdlgloader.la .libs/libkdlgloader.* .libs/libkdlgloader.*
g++ -shared  kdlgldr.lo kdlgldr_itemstuff.lo kdlgptrdb.lo
-L/usr/X11R6/lib -L/opt/kde/lib /opt/kde/lib/libkdeui.so
/opt/kde/lib/libkdecore.so -lXext -lqt -lpng -lz -lm -lXext -lX11 -lXext
-lqt -lpng -lz -lm -lXext -lX11 -lc  -Wl,-soname -Wl,libkdlgloader.so.1 -o
.libs/libkdlgloader.so.1.0.0
/usr/bin/ld: .libs/libkdlgloader.so.1.0.0: undefined versioned symbol name
clog@@GLIBC_2.1
/usr/bin/ld: failed to set dynamic section sizes: Bad value
collect2: ld returned 1 exit status

What is it:  "clog@@GLIBC_2.1"?? What is wrong? (I did not find any hint
in FAQ). 

With best wishes,
Alexander Zvyagin.