[Bug libstdc++/79017] Old PowerMac G5, MacPorts GCC 5.4, C++11 and "std::log2 has not been declared"

[noloader at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79017

--- Comment #7 from Jeffrey Walton <noloader at gmail dot com> ---
(In reply to Jeffrey Walton from comment #5)
> (In reply to Jonathan Wakely from comment #2)
> ...
> > But OS X 10.5.8 is pretty old, and this might not be worth doing if it
> > doesn't affect current versions of OS x.
> 
> The issue seems to affect Android as well:
> http://stackoverflow.com/q/22922961. I am not sure if its the exact same
> issue however.
> 
> Splitting the checks may benefit more than an ancient PowerMac.
> 
> For what its worth, I keep the antique hardware around for testing on the
> PowerPC, which is big-endian. Otherwise it would be retired.

Wow, this is a surprising statistic (for me)... OS X 10.5 makes up 29.1% of the
MacPorts downloads. Its the largest percentage for the OS group. Confer,
http://stats.macports.neverpanic.de/os_statistics#osx_version.

Also, according to https://trac.macports.org/ticket/53226#comment:5, the issue
affects both PPC and Intel machines. So it affects 100% of the architectures
(even though PPC makes up less than 2%).

I wonder how many Homebrew or Fink users (et al) have similar statistics.