RE: non virtual dtor warning

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non virtual dtor warning
\ James Tebneff (25 Feb 2008)
. \ Rupert Wood (25 Feb 2008)

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Subject:	RE: non virtual dtor warning
Group:	Gcc-help
From:	Rupert Wood
Date:	25 Feb 2008

James Tebneff wrote:

> g++-svn -Weffc++ -Wno-non-virtual-dtor t.c
> t.c:2: warning: base class struct A has a non-virtual destructor
:
> Is it possible to use -Wno-non-virtual-dtor or otherwise to disable
> that warning?

You'll find that warning in cp/class.c. It's switched only on -Weffc++:

/* Effective C++ rule 14. We only need to check TYPE_POLYMORPHIC_P
here because the case of virtual functions but non-virtual
dtor is handled in finish_struct_1. */
if (!TYPE_POLYMORPHIC_P (basetype))
warning (OPT_Weffc__,
"base class %q#T has a non-virtual destructor", basetype);

So no, sorry, there's no way to disable that warning individually. -Wnon-virtual-dtor controls another similar warning that (at first glance) is triggered only if there are virtual functions.

Given -Weffc++ in c-opts.c implies -Wnon-virtual-dtor there could be a case for making the above warning conditional on both -Weffc++ and -Wnon-virtual-dtor.

Rup.

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