Compiler version

Thiago Macieira thiago at
Thu Jun 28 20:20:54 BST 2012

On quinta-feira, 28 de junho de 2012 18.53.03, vivo75 at wrote:
> Il 28/06/2012 16:31, Thiago Macieira ha scritto:
> > On quinta-feira, 28 de junho de 2012 14.38.37, vivo75 at wrote:
> >> actually for stability and feature related to c++11 gcc-4.7 is nearly
> >> the minimum, but in my experience gcc-4.7 is still a bit rough so +1 for
> >> gcc-4.6
> > 
> > That's nonsense. C++11 support in GCC 4.5 and 4.6 is just fine.
> Thiago you work to qt5 which include the c++11 stuff, so probably you
> know better than rumors around, must admit that I've spoken by those
> rather than an extended experience in the field.

We may not be talking about the same thing.

> What made me think the rumors were true is:
> a) many programs which support to be compiled with c++11 syntax require
> gcc-4.7

It depends on which C++11 feature you're using. Qt has an #define for each of 
them so you can know if the compiler supports such a feature.

Qt does not require C++11 and will not for many years. What's more, any 
program requiring full and unrestricted C++11 support will be extremely niche 
and not very popular until at least 2014. For those of us living in the real 
world, we have to accept that C++11 support is limited and therefore limit 
what we use of it.

That being the case, GCC 4.5 and 4.6 are more than enough.

> b) that the resolved/fixed bug list is rather long:

I used GCC 4.5 and 4.6 each for a year and I don't remember any serious bugs 
with them. 

There was one bug I reported (I think it was 4.5), which wasn't promptly fixed 
because it was in C++11 and that was experimental. Another issue I remember, 
which is definitely non-fatal, is that constexpr variables end up in the .data 
section instead of the .rodata one in 4.6.

Thiago Macieira - thiago (AT) - thiago (AT)
   Software Architect - Intel Open Source Technology Center
      PGP/GPG: 0x6EF45358; fingerprint:
      E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
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