cannot find -ldl

Vladimir Iskoz Vladimir.Iskoz at
Tue Nov 14 15:14:42 CET 2006

Hi Eric,
Thanks a lot for your help.
I uncommented NO+AF8-SHARED+AF8-LIBS +AD0- 1 in the iptables Makefile but received:
undefined reference to 'dl+AF8-open'
It seems that some files are still looking for libdl.a or
I found them in /usr/lib but I don't know whether they are relevant to uClinux or not.

I will very thankfull for any help


+AD4- Hi all,
+AD4- I'm trying to add firewall functionality to my current project. I'm starting with adding iptables (1.3.4) to my project using Buildroot menucofig tool.
+AD4- Unfortunately I received the following error during the link:
+AD4- cannot find -ldl

You should try to compile it statically as you plan to use it on an
embededded system.
In iptables Makefile uncommment :


+AD4- I tried to removed -ldl from iptables Makefile but receive the other errors:
+AD4- undefined reference to 'dl+AF8-open'
+AD4- ...
+AD4- I'm using armeb-linux-uclibc-gcc 
+AD4- Where are I can find corresponding libdl.a (I did not find it in my project)?
+AD4- What workaround can be done?
+AD4- The last rows during Buildroot compilation before the Error are:
+AD4- /home/vladimir/R2/osdk/buildroot/build+AF8-armeb+AF8-nofpu/staging+AF8-dir/bin/armeb-linux-uclibc-gcc -Os -pipe  -membedded-pic -Wall -Wunused -I/include -Iinclude/ -DIPTABLES+AF8-VERSION+AD0AXAAi-1.3.4+AFwAIg-  -D+AF8-UNKNOWN+AF8-KERNEL+AF8-POINTER+AF8-SIZE -DIPT+AF8-LIB+AF8-DIR+AD0AXAAi-/usr/lib/iptables+AFwAIg- -rdynamic -o iptables iptables-standalone.c iptables.o libiptc/libiptc.a -ldl -lnsl
+AD4- /home/vladimir/R2/osdk/buildroot/build+AF8-armeb+AF8-nofpu/staging+AF8-dir/bin-ccache/../lib/gcc/armeb-linux-uclibc/3.4.5/../../../../armeb-linux-uclibc/bin/ld: cannot find -ldl
+AD4- What is a preferable way to add iptables: add them to Buildroot menu or explicitly to Linux Kernel menu in Network Options?
+AD4- My Target details:
+AD4- Architecture: ARM
+AD4- OS: uClinux
+AD4- Linux Kernel: 2.6.14
+AD4- Cross Compilation Tool: Buildroot
+AD4- Thanks a lot for any help
+AD4- Vladi Iskoz

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