C++: Letting compiler know asm block can call function that can throw?

[Stephan Bergmann]

On 03/29/2012 04:12 PM, Andrew Haley wrote:
> On 03/29/2012 02:59 PM, Michael Matz wrote:
>> Actually, with -fnon-call-exceptions volatile asms are already supposed to
>> be throwing.  It's just that this got lost with tree-ssa.  With the patch
>> and -fnon-call-exceptions a simple "__asm__ volatile (...)" is regarded as
>> possibly throwing.
>>
>> Without -fnon-call-exceptions some parser changes would be required.  How
>> about "asm throw (...)" ?
>
> Is there any point?  I would have thought that -fnon-call-exceptions was
> exactly what you need.

But it looks wrong to me to have to mark the complete compilation unit 
for something that should only affect a single asm declaration.  (Also, 
having to specify -fnon-call-exceptions "externally," on the command 
line, is somewhat awkward.)

Stephan