If you are running Mac OS X 10.6 (Snow Leopard = SL henceforth) it is
easy to compile R, but there are a few pitfalls especially for users
that upgrade from Leopard.
(Side note: there is no need to compile your own R, all binaries
including the 64-bit Leopard binaries from
http://r.research.att.com/
and corresponding binary packages from CRAN are compatible with Snow
Leopard).
On a *clean* SL system (fresh install):
* install Xcode 3.2 (from SL DVD)
* install gfortran 4.2.3 from CRAN
http://cran.r-project.org/bin/macosx/tools/gfortran-4.2.3.dmg
To compile 64-bit, use
../R-devel/configure r_arch=x86_64 CC="gcc -arch x86_64" \
CXX="g++ -arch x86_64" F77="gfortran -arch x86_64" \
FC="gfortran -arch x86_64" OBJC="gcc -arch x86_64" \
--x-includes=/usr/X11/include --x-libraries=/usr/X11/lib
make -j8 && make install
(replace R-devel above with the place you keep R sources, you should
not build directly in the source directory)
For 32-bit replace all x86_64 with i386 above. (You can build both and
install in the same place, they'll co-exist nicely).
NOTE: You must specify -arch for all compilers, because the defaults
now differ between Apple's Xcode 3.2 compilers and our gfortran.
---
IMPORTANT: If you upgraded from Leopard and/or you installed R for
Leopard (Mac OS X 10.5) you may have a old gfortran from Xcode 3.1 on
your machine - it will NOT work on SL properly. You MUST remove it and
use the CRAN build of gfortran (or comparable) instead. To check for
it run "which gfortran" in the Terminal - it should show either
This is ok, you have CRAN gfortran:
Fino:~$ which gfortran
/usr/local/bin/gfortran
Fino:~$
This is also ok for now, you have no gfortran, but you can install the
one from CRAN:
Fino:~$ which gfortran
Fino:~$
This is bad:
Fino:~$ which gfortran
/usr/bin/gfortran
Fino:~$
If you have /usr/bin/gfortran, remove it, e.g.
sudo rm /usr/bin/gfortran
---
I hope this helps, I'll also put it in the FAQ.
Cheers,
Simon
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