Same error here, after updating kdelibs:

/bin/sh ../libtool --silent --tag=CXX --mode=link g++  -Wno-long-long -Wundef 
-ansi -D_XOPEN_SOURCE=500 -D_BSD_SOURCE -Wcast-align -Wconversion 
-Wchar-subscripts -Wall -W -Wpointer-arith -g3 -fno-inline -Wformat-security 
-Wmissing-format-attribute -Wno-non-virtual-dtor -fno-exceptions 
-fno-check-new -fno-common  -DQT_CLEAN_NAMESPACE -DQT_NO_ASCII_CAST 
-DQT_NO_STL -DQT_NO_COMPAT -DQT_NO_TRANSLATION    -o libkio.la 
-rpath /home/moura/kde-3.5/lib -version-info 6:0:2 -no-undefined 
-Wl,--no-undefined -Wl,--allow-shlib-undefined -L/home/moura/kde-3.5/lib 
-L/home/moura/kdesvn-3.5/build/qt-copy/lib -L/usr/X11R6/lib     dummy.lo 
kssl/libkssl.la kio/libkiocore.la kio/libksycoca.la 
bookmarks/libkbookmarks.la 
kfile/libkfile.la ../kdeui/libkdeui.la ../kdesu/libkdesu.la ../kwallet/client/libkwalletclient.la 
-lz -lfam  -lacl -lattr
grep: /lib/libattr.la: No such file or directory
/usr/bin/sed: can't read /lib/libattr.la: No such file or directory
libtool: link: `/lib/libattr.la' is not a valid libtool archive
make[1]: *** [libkio.la] Error 1
make[1]: Leaving directory `/home/moura/development/kde/3.5/kdelibs/kio'

Solved after installing libattr-devel package which fortunately have this 
symbolic link:
lrwxrwxrwx  1 root root 18 2005-09-04 16:34 /lib/libattr.a 
-> /usr/lib/libattr.a

Paulo
 
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