[R-SIG-Mac] Problems to install a package

[Berend Hasselman]

> On 31-07-2015, at 20:46, peter dalgaard <pdalgd at gmail.com> wrote:
> 
>> 
>> On 31 Jul 2015, at 12:33 , Timothy Bates <tim.bates at ed.ac.uk> wrote:
>> 
>> This happened for me too: that Intel Core 2 is just too old for the compiler.
>> 
>> I used it as a stimulus to buy a new laptop… As a bonus, everything is ~10x faster
>> Best, tim
> 
> Hum, well, I wasn't actually planning to switch out my MB Air just now.
> 
> I'm actually baffled that I haven't bumped into this before. Both my laptop and my office desktop are Core 2 Duo machines (and the latter is the one that builds the R source releases!).
> 

If you use gfortran: which version?
If you are not using any floating point then gfortran-4.8 will probably work without problems.
I think.

> Anyone have some harder info on this? Is it the case that gfortran-4.8 cannot compile code for the C2D architecture, or is it just that the compiler binaries on Simon's site were built for later architectures and are not backwards compatible. The latter could be fixed by rebuilding the compiler.
> 

As far I know the compiler binaries use/generate floating point instructions directly or indirectly that cannot be handled by a C2D.
See this reply by Simon to my original post:  https://stat.ethz.ch/pipermail/r-sig-mac/2014-May/010895.html
Probably more than just the compiler binaries would have to be recompiled.

Berend