Linking problem Post: 302579501

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Top Forums Programming Linking problem Post 302579501 by philippevk on Monday 5th of December 2011 10:03:16 PM

12-05-2011

Registered User

Linking problem

Hi!

We recently updated the server (server is a big word, it's really just a desktop with Ubuntu that we access with ssh) on which we compile our code. Since the update my code won't compile. The linker is complaining about missing references from almost all .so that I'm linking from. It compiles on my own pc so I don't think it's the problem . Additional info :

The raw g++ command (it's quite long, sorry!) :

Code:

g++ -fPIC -O3 -DNDEBUG -I. -Igen -I../gflags-1.5/src -I../zlib-1.2.5 -DARCH_K8 -Wno-deprecated -I../protobuf-2.3.0/src -I../cbc-2.6.2/include -DUSE_CBC
-I../cbc-2.6.2/include -DUSE_CLP -I../glpk-4.45/include -DUSE_GLPK  -Wl,-rpath /lib/x86_64-linux-gnu/ -L/lib/x86_64-linux-gnu/ -Wl,-rpath ../gflags-1.5/lib
-L../gflags-1.5/lib -lgflags -Wl,-rpath ../zlib-1.2.5/lib -L../zlib-1.2.5/lib -lz -Wl,-rpath ../protobuf-2.3.0/lib -L../protobuf-2.3.0/lib -lprotobuf -lpthread -lrt
objs/nqueensBenchmark.o objs/benchmarkTimer.o librouting.a libconstraint_solver.a libutil.a libbase.a -o bin/benchmark/nqueens

Some of the weirdest error message I get to show that there are linker errors with both standard libraries (librt, libpthread) and libraries specific to my program.

Code:

timer.cc:(.text+0x15d): undefined reference to `clock_gettime'
demon_profiler.pb.cc:(.text+0x6f3): undefined reference to `pthread_once'
assignment.pb.cc:(.text+0x2d80): undefined reference to `google::protobuf::Message::~Message()'

Versions

Ubuntu version : 11.10 (Oneiric Ocelot) 64 bit
GCC version : 4.6.1 (tried with 4.5.4 too)

Things I tried

- Adding "-Wl,-rpath /lib/x86_64-linux-gnu/ -L/lib/x86_64-linux-gnu/" to the compile command (since it's where librt is located)
- Using g++ 4.5.4 instead of 4.6.1

Any ideas?

Philippe Van Kessel

Last edited by philippevk; 12-05-2011 at 11:08 PM..

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xml2-config

xml2-config(1)						      General Commands Manual						    xml2-config(1)

NAME

       xml2-config - script to get information about the installed version of libxml

SYNOPSIS

       xml2-config [--prefix[=DIR]] [--libs] [--cflags] [--version] [--help]

DESCRIPTION

       xml2-config  is	a  tool  that  is used to determine the compile and linker flags that should be used to compile and link programs that use
       libxml.

OPTIONS

       xml2-config accepts the following options:

       --version
	       Print the currently installed version of libxml on the standard output.

       --libs  Print the linker flags that are necessary to link a libxml program.

       --cflags
	       Print the compiler flags that are necessary to compile a libxml program.

       --prefix=PREFIX
	       If specified, use PREFIX instead of the installation prefix that libxml was built with when computing the output for  the  --cflags
	       and --libs options. This option must be specified before any --libs or --cflags options.

AUTHOR

       This manual page was written by Fredrik Hallenberg <hallon@lysator.liu.se>, for the Debian GNU/linux system (but may be used by others).

NOTES

       Source for libxml is available in the SUNWlxmlS package.  Documentation for libxml is available on-line at http://www.xmlsoft.org/

								    3 July 1999 						    xml2-config(1)