Apple

Le 21 juil. 2010 à 21:03, Eric Gorr a écrit :

On Jul 21, 2010, at 2:05 PM, James Walker wrote:

On 7/21/2010 10:35 AM, Eric Gorr wrote:
I am working towards getting rid of all link warnings, but I am getting
three that I don't quite understand and a google search for this warning
hasn't been helpful.

The output to Xcode looks like:

ld: warning: can't add line info to anonymous symbol
__ZN16CLineAlignWidgetD0Ev.lsda from /path/to/CLineAlignWidget.o

What causes this warning and what can be done to fix it?

I have looked at the CLineAlignWidget class and it looks like other
classes which aren't generating this warning.

I don't know if this helps, but the c++filt tool demangles __ZN16CLineAlignWidgetD0Ev as CLineAlignWidget::~CLineAlignWidget().

Thanks.

Well, in this specific case, it appears to have meant that I needed to add:

virtual ~CLineAlignWidget( void ) {}

However, with the other two similar warnings:

ld: warning: can't add line info to anonymous symbol __ZN11CBaseWidgetD0Ev.lsda from /Path/To/CLightWidget.o
ld: warning: can't add line info to anonymous symbol __ZN11CBaseWidgetD0Ev.lsda from /Path/To/C3DLocationWidget.o

Which seem to be duplicates, c++filt shows:

~ $c++filt __ZN11CBaseWidgetD0Ev
CBaseWidget::~CBaseWidget()

and CBaseWidget already has

virtual ~CBaseWidget( void ) {}

So, there appears to be something else going on here which a better understanding of what the link warning means would probably resolve.