Re: C++: not defining thrown exceptions produces error, but only on hppa platform

[Jason Gunthorpe <jgg@debian.org>]

On Thu, 12 Sep 2002, Daniel Lutz wrote:

> Here are the error messages:
> 
> g++ -DHAVE_CONFIG_H -I. -I. -I../..     -g -O2   -c -o XBase.o `test -f
> XBase.cpp || echo './'`XBase.cpp
> In file included from XBase.cpp:15:
> XBase.h:33: looser throw specifier for `virtual XBase::~XBase()'
> /usr/include/g++-v3/exception:53:   overriding `virtual 
>    std::exception::~exception() throw ()'
> XBase.h:36: looser throw specifier for `virtual const char*
> XBase::what() 
>    const'
> /usr/include/g++-v3/exception:56:   overriding `virtual const char* 
>    std::exception::what() const throw ()'

It is saying that you have overridden a virtual method that has a
restricted throw list and made the throw list broader. (ie you went from
method does not throw anything to method can throw anything)

You need to change:

>     virtual ~XBase();
>     virtual const char* what() const;

To

     virtual ~XBase() throw();
     virtual const char* what() const throw();

and probably also change the function body too.

Jason