Re: [squid-users] Requiring C++11 support (Was: Squid 3.4.5 is available)

On 05/06/2014 12:52 AM, Martin Sperl wrote:

> Out of curiosity: which features of c++11 do you want to use to
> make gcc 4.8 an absolute requirement for the next major release?

IMO, none. As Amos have mentioned, C++11 offers a few development
convenience/safety features and some performance improvements, but none
of them are an "absolute requirement for the next major release". FWIW,
I was also surprised by the approaching C++11 requirement announcement.

This is not my area of expertise, but I consider compiler requirements
different from autoconf requirements that were also discussed on this
thread. When it comes to autoconf, bootstrapping folks running on older
machines (e.g., RHEL5) have a few acceptable options. For example, it is
not very difficult to install the right autoconf/etc versions from
sources locally and bootstrap Squid using them (in a user account on the
same RHEL5 machine or elsewhere). This is annoying, but does not affect
many admins, does not affect overall system operation, does not
introduce a lot of unknowns, and does not conflict with most local policies.

Installing a custom compiler version or cross-compiling is a much bigger
problem on many levels IMHO.

Cheers,

Alex.

> On 05/06/2014 05:17 AM, Amos Jeffries wrote:

>> Atomics for better/simpler SMP and to begin native threading of some
>> components. Lambdas for better hashing, indexing algorithms ACLs etc.
>> Move constructors for better performance across the board. Auto type
>> deduction for simpler APIs on most of the complex template APIs. Each
>> time we go diving into documentation for features we find something else.
>>
>> Some of these like move constructors are already being relied on for
>> performance gains in 3.5 via the increased STL usage. There are other
>> features which we have managed to write custom replacements for 3.3+ (ie
>> nullptr and some of the atomics). However we expect to see small but
>> measurable difference in speed between Squid binaries depending on the
>> compiler version used to build it.
Received on Tue May 06 2014 - 17:15:43 MDT