NS_LOG and templates (multiple declarations of ns3::g_log)

[Chris Facchini]

Hi,

Is it possible to have NS_LOG facilities in templated classes?

The problem is, in case of a templated class I have to define class
methods in the header file (gcc doesn't support the 'export' keyword).

So, when I try to add NS_LOG_COMPONENT_DEFINE("CompName") in the .h
file, the compiler complains that g_log has been already declared
somewhere else (which is true, but for other components).
Errors go like this:
../src/contrib/cogent/variable.cc:17: error: redefinition of
‘ns3::LogComponent ns3::g_log’
../src/contrib/cogent/data.h:51: error: ‘ns3::LogComponent ns3::g_log’
previously declared here
../src/contrib/cogent/acting-variable.cc:17: error: redefinition of
‘ns3::LogComponent ns3::g_log’
../src/contrib/cogent/data.h:51: error: ‘ns3::LogComponent ns3::g_log’
previously declared here

Any idea how to solve this mystery?

TIA,
Chris

[Taral Shah]

Hi ,

You have to include NS_LOG_COMPONENT_DEFINE("MyExample") in your code.

Taral

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[Mathieu Lacage]

On Wed, Jan 26, 2011 at 16:52, Chris Facchini <c.fac...@gmail.com> wrote:

> Is it possible to have NS_LOG facilities in templated classes?

no.

Mathieu
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Mathieu Lacage <mathieu...@gmail.com>