Bug 1292 – Strange linker behavior on Ubuntu 11.10

Bug 1292 - Strange linker behavior on Ubuntu 11.10


Summary:	Strange linker behavior on Ubuntu 11.10

Status:	RESOLVED FIXED

Product:	ns-3
Classification:	Unclassified
Component:	build system
Version:	ns-3-dev
Hardware:	PC Linux

Importance:	P5 critical
Assigned To:	Gustavo J. A. M. Carneiro

URL:
Keywords:

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2011-11-14 17:06 UTC by Alex Afanasyev
Modified:	2011-11-17 13:11 UTC (History)
CC List:	2 users (show)

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Description Alex Afanasyev 2011-11-14 17:06:45 UTC

On Ubuntu 11.10 the linker be default includes --as-needed flag. As a result, all applications that include a dynamic object instantiation from a library, but don't directly use the library (e.g., running simulation with --vis flag) fail to work.

The following patch adds -Wl,--no-as-needed flag to gcc compiler: 
https://bitbucket.org/cawka/ns-3-dev/changeset/c5bde697240d

Comment 1 Mathieu Lacage 2011-11-17 09:47:39 UTC

gustavo, can you review this patch ? If it is ok with you, feel free to push.

Comment 2 Gustavo J. A. M. Carneiro 2011-11-17 09:59:09 UTC

This sounds great in principle, but I haven't tested yet.  It probably also fixes all those visualizer problems people have been having...

Comment 3 Alex Afanasyev 2011-11-17 11:51:08 UTC

Yes. Problems with the visualizer was the reason to investigate the problem

Comment 4 Gustavo J. A. M. Carneiro 2011-11-17 13:11:58 UTC

Pushed it.  Thank you for the patch.