build 32-bit R on x86_64?
On Aug 9, 2011, at 8:12 PM, Dirk Eddelbuettel wrote:
Hi Vinh, On 9 August 2011 at 16:40, Vinh Nguyen wrote: | Dear R-Devel, | | I'm using Ubuntu on an x86_64 machine and would like to have both the | 32-bit and 64-bit versions of R built from source. By default, | following the usual build procedures yields 64 bit R. Looking at | [these](http://cran.r-project.org/doc/manuals/R-admin.html#Sub_002darchitectures), | I thought I could build 32-bit R by executing | | r_arch=32 ./configure | | and building R like usual (make). However, after seeing this error message, | | /usr/bin/install: cannot create regular file | `../../include/32/Rconfig.h': No such file or directory | | I realize I am misunderstanding the instructions. Could someone | please clarify how I could go about compiling both 32-bit and 64-bit | versions of R on my Linux machine? Thank you! I do not think that multiarch build (ie 32 and 64 at the same time) are fully supported yet on Ubuntu or Debian. It is coming, but just like a number of other things, not exactly overnight. It is a release goal.
It actually works ;) I'm using it for testing on my RForge.net machine and yes, it's Debian - everything just works there :). But back to the original question. First a minor detail, don't set environment variables use configure variables instead. Second, don't build in the source directory, always create an object directory. Third, r_arch is simply a name you set for the architecture, it has no meaning other than that it's a label. So now to the real stuff. If you want 32-bit build, you'll need 32-bit runtime of everything important in your system and the multilib compilers. In Debian (and thus likely in Ubuntu too) that can be achieved by something like sudo apt-get install ia32-libs-dev lib32readline6-dev lib32ncurses5-dev lib32icu-dev gcc-multilib gfortran-multilib Then you can build both 64-bit and 32-bit R, the difference will be in the all compiler flags -- for 64-bit you'll use -m64 (or nothing since it's the default) and for 32-bit you'll use -m32. So roughly something like tar fxz R-2.13.1.tar.gz mkdir obj-32 cd obj-32 ../R-2.13.1/configure r_arch=i386 CC='gcc -std=gnu99 -m32' CXX='g++ -m32' FC='gfortran -m32' F77='gfortran -m32' make -j24 && sudo make install rhome=/usr/local/R/2.13 cd .. mkdir obj-64 cd obj-64 ../R-2.13.1/configure r_arch=amd64 make -j24 && sudo make install rhome=/usr/local/R/2.13 That will leave you with multi-arch R that you can run with R --arch=i386 # 32-bit R --arch=amd64 # 64-bit Packages will be also built as multi-libs. Good luck :) [BTW the rhome=... setting is entirely optional, I just like to keep my R versions organized?] Cheers, Simon
In the meantime, you can always use virtualization. I have a Debian 32-bit system and an Ubuntu 32-bit system in KVM virtualization on my Ubuntu 64-bit server. That works well. Kvm, or Xen, or Virtualbox, or Vmware, ... all offer fairly decent virtualization. Debian/Ubuntu specific questions are even more welcome on r-sig-debian. Dirk -- Two new Rcpp classes scheduled for New York and San Francisco, details at http://dirk.eddelbuettel.com/blog/2011/08/04#rcpp_classes_2011-09_and_2011-10
______________________________________________ R-devel at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel