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Re: undefined reference error

From: Ralf Wildenhues
Subject: Re: undefined reference error
Date: Sat, 23 Oct 2010 10:04:27 +0200
User-agent: Mutt/1.5.20 (2010-08-04)

Hello Sergio,

* Sergio Belkin wrote on Wed, Oct 20, 2010 at 05:08:51PM CEST:
> I have a project that is a library that links against libresolv,
> It works fine on recent distros: Ubuntu 10.x  Fedora 13, Mandriva
> 2010.1 but on Centos 5.x I get the following errors
> g++ -DHAVE_CONFIG_H -I.  -I./include -I/usr/include/postgresql  -O3
> -ansi   -Wall -Wno-deprecated  -D_FORTIFY_SOURCE=0 -MT testUpLog.o -MD
> -MP -MF .deps/testUpLog.Tpo -c -o testUpLog.o
> mv -f .deps/testUpLog.Tpo .deps/testUpLog.Po
> /bin/sh ./libtool --tag=CXX   --mode=link g++  -O3 -ansi   -Wall
> -Wno-deprecated  -D_FORTIFY_SOURCE=0  -L/usr/lib64 -L/lib64
> -L/usr/lib64/mysql -o testUpLog testUpLog.o -lpq
> -lmysqlclient -lssl -lpthread
> libtool: link: g++ -O3 -ansi -Wall -Wno-deprecated -D_FORTIFY_SOURCE=0
> -o .libs/testUpLog testUpLog.o  -L/usr/lib64 -L/lib64
> -L/usr/lib64/mysql ./.libs/ -lpq -lmysqlclient -lssl
> -lpthread
> ./.libs/ undefined reference to `__ns_name_uncompress'
> ./.libs/ undefined reference to `__ns_initparse'
> ./.libs/ undefined reference to `__ns_parserr'
> collect2: ld returned 1 exit status
> make[1]: *** [testUpLog] Error 1

Don't you need to link against libresolv?  Try adding -lresolv to


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