[R-SIG-Mac] gcc, gfortran and Xcode upgrade

[Simon Urbanek]

On Jan 18, 2012, at 1:15 AM, Charlie Sharpsteen wrote:

> On Tuesday, January 17, 2012 6:57:55 AM UTC-8, Simon Urbanek wrote:
> 
> On Jan 17, 2012, at 9:27 AM, Federico Calboli wrote:
> > Hi,
> > 
> > I am on OS X 10.7.2, Xcode 4.2.1, R 2.14.1 (GUI 6008) and I was wondering what would happen if I installed 
> > 
> > gcc-4.2 (Apple build 5666.3) with GNU Fortran 4.2.4 for Mac OS X 10.7 (Lion)
> > (from http://r.research.att.com/tools/)
> > 
> > and then Apple released Xcode 4.2.2… would I have to reinstall gcc-4.2 and gfortran after upgrading Xcode?
> >
> 
> I didn't actually test it, but Xcode should not touch the gcc-4.2 installed by us, so the answer should be no (if Apple plays by its own rules).
> 
> Cheers,
> Simon
> 
> All incarnations of XCode that I have seen have linked dev tool binaries into /usr. The package installs compilers to /usr/local so they should be safe.
> 

No, the gcc-4.2 package (and gfortran for Xcode) installs into /usr


> There are rumblings indicating that XCode 4.3 will keep the dev tools internal to XCode.app its self and not link anything to /usr other than a few utility tools such as xcode_select.
> 

Interestingly there is iOS beta but no OS X beta so I wouldn't panic since for iOS it makes sense.

Cheers,
Simon