On Mar 17, 2010, at 9:38 AM, Simon Anders wrote: > Hi Simon etc. > > We've recently got a number of question from users of our packages, who, for > certain reasons, wanted to compile them from source on a Mac, and ran into > problems, namely the error message that 'gcc-4.2' was not found. I don't know > if the issue has already been discussed but as I've just investigated it,
It is worth checking the archives - it would give you the correct answer. It is simply about outdated Xcode. We require Xcode 3.1 or higher for Leopard builds -- see http://r.research.att.com/tools/ mainly because of issues in older Xcodes. The latest Xcode for 10.5 is Xcode 3.1.4 and is at the top of the Xcode download list in ADC (=easy to find). Admittedly, the Tiger build requirement (Xcode 2.4.0+)is in the FAQ, Leopard (Xcode 3.1+) is not -- I'll fix that. Thanks, Simon > I would like to share my findings. (Note that I'm not a Mac user myself, so I > am not too experienced with this.) > > It seems that the current version of Xcode (3.2.1) has the GNU Compiler > Collection (GCC) in the version 4.2. Most users of Leopard have, however, the > old Xcode 3.0 installed, which ships with GCC 4.0. (The Xcode 3.2.1 package > presented on the Apple web site only works for Snow Leopard. There is an > XCode 3.2.x for Leopard as well somewhere on the web site, but it is quite > difficult to find.) > > I've just looked over the shoulder of a Mac user who had installed the > pre-compiled binary from CRAN for R-2.11.0 (devel) on his Leopard machine > with Xcode 3.0 installed. When he tried to run 'R CMD INSTALL' on a source > package, he got the aformentioned error that 'gcc-4.2' was missing. > > The reason that R was explicitly looking for 'gcc-4.2' was that this is what > the 'CC' variable was se to in Makeconf (to be precise: in > /Library/Framework/R.framework/Resources/i386/Makeconf ) > > We changed, in the Makeconf file, 'gcc-4.2' to 'gcc' in the definition of > 'CC', and likewise for 'g++-4.2' and 'gfortran-4.2' in the respective lines. > (Note that all Xcode versions seem to install a symlink from the installed > binary 'gcc-4.x' to 'gcc' and likewise for g++ and gfortran.) Furthermore, it > was necessary to remove the compiler flag '-mtune=core2' from CC_FLAGS, > CXX_FLAGS and FC_FLAGS, as this tuning target was not yet available in GCC > 4.0. > > With this, building source packages worked fine. > > Conclusion: The precompiled R binary for Mac would be "more compatible", > namely working with the typical configuration of both Leopard and Snow > Leopard if the Makeconf did not specify the exact GCC version and did not use > the 'core2' tuning flag. > > Could we change this, please? > > Cheers > Simon > > > > +--- > | Dr. Simon Anders, Dipl.-Phys. > | European Molecular Biology Laboratory (EMBL), Heidelberg > | office phone +49-6221-387-8632 > | preferred (permanent) e-mail: sand...@fs.tum.de > > _______________________________________________ R-SIG-Mac mailing list R-SIG-Mac@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-mac
