Bootstrap failure in tree-object-size.c due to -Wnarrowing (was: [C++ Patch] PR 50810)

Paolo Carlini paolo.carlini@oracle.com
Sun Oct 23 22:31:00 GMT 2011


On 10/23/2011 11:05 PM, Gabriel Dos Reis wrote:
> On Sun, Oct 23, 2011 at 3:45 PM, Eric Botcazou<ebotcazou@adacore.com>  wrote:
>>> Anyway, the below appears to work for me. Eric shall I commit it?
>> I have other errors for config/i386/i386.c on my x86-64 machine.  But are we
>> sure that we want to warn on
>>
>> static unsigned HOST_WIDE_INT unknown[4] = { -1, -1, 0, 0 };
>>
>> with -Wall?  This seems overly picky to me.
>>
> The warning probably should not be in -Wall.  It is fairly recent in C++, and I
> think we should allow users to adapt before enabling it by default.
The issue is that we wanted -Wconversion to be enabled by -Wc++0x-compat 
(after all, it's what the PR asks) but the latter is *already* in -Wall.

Personally, I would be in favor of taking -Wc++0x-compat out of -Wall.

Paolo.



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