When /etc/ld.so.cache is writeable by user running bitbake then it creates invalid cache 
(in my case libstdc++.so cannot be found after building zlib(-native) and I have to call 
touch */libstdc++.so && /sbin/ldconfig to fix it.

So remove ldconfig call from make install-libs

Upstream-Status: Inappropriate [disable feature]

diff -uNr wireless_tools.29.orig/Makefile wireless_tools.29/Makefile
--- wireless_tools.29.orig/Makefile	2007-09-18 01:56:46.000000000 +0200
+++ wireless_tools.29/Makefile	2012-02-15 20:46:41.780763514 +0100
@@ -163,7 +163,6 @@
 	install -m 755 $(DYNAMIC) $(INSTALL_LIB)
 	ln -sfn $(DYNAMIC) $(INSTALL_LIB)/$(DYNAMIC_LINK)
 	@echo "*** Don't forget to add $(INSTALL_LIB) to /etc/ld.so.conf, and run ldconfig as root. ***"
-	@$(LDCONFIG) || echo "*** Could not run ldconfig ! ***"
 
 # Install the static library
 install-static:: $(STATIC)