Re: Compiling with gcc-4.0.0 and -fno-exceptions

[Dan Kegel <dank at kegel dot com>]

Paolo Carlini wrote:
> >                                      I would suggest trying to figure
> > which is the current situation in Bugzilla, 4.0.1 pre, and mainline (I
> > can also do that, of course, but would appreciate a stand-alone snippet
>
> > from your work) and then take the appropriate action.
>
> The issue seems fixed in mainline (I'm using simple testcases like a
> single uninitialized_copy on a vector of non-PODs, -fno-exceptions -O
> -Wreturn-type). However, seems still present in 4_0-branch,
> unfortunately. I would suggest making sure that there are no duplicate
> PRs and, in case, file one, the safe way: it can even be that in
> mainline it's fixed by chance ;)

Here's one example of the problem in question:

#include <vector>
std::vector<int> *factory()
{
        std::vector<int> *p = new std::vector<int>;
        p->reserve(10);
        return p;
}

$ i686-unknown-linux-gnu-g++ foo.cc -Wall -O -fno-exceptions
.../include/c++/4.0.0/bits/vector.tcc: In member function 'void std::vector<_Tp, _Alloc>::reserve(size_t) [with _Tp = int, _Alloc = std::allocator<int>]':
.../include/c++/4.0.0/bits/vector.tcc:78: warning: control may reach end of non-void function 'typename _Alloc::pointer std::vector<_Tp, _Alloc>::_M_allocate_and_copy(size_t, _ForwardIterator, _ForwardIterator) [with _ForwardIterator = 
int*, _Tp = int, _Alloc = std::allocator<int>]' being inlined

And as you said, the same error does not occur with
a recent snapshot of gcc-4.1.

I'll file the bug against gcc-4.0 as you suggested
after a bugzilla search.

Thanks!
- Dan

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