[R-SIG-Mac] architecture problems for BUILD & SHLIB

Prof Brian Ripley ripley at stats.ox.ac.uk
Mon Jan 13 09:40:05 CET 2014

-arch i386 is not specified in R itself (and neither is gcc-4.0).  As a 
guess you have a personal Makevars file, either in the package sources 
or under ~/.R .  See 

On 06/01/2014 14:14, Dan Rabosky wrote:
> Hi-
> I am building a package that includes C code. When I try to compile the source files using SHLIB (or build the package using BUILD), it fails because it builds for the wrong architecture. Specifically, SHLIB and BUILD specify "-arch i386" by default on my machine. When I override and compile manually with "-arch x86_64", it is fine. I'm unsure how to deal with this problem. Where are the configuration files that SHLIB and BUILD are using that specify the compiler and the architecture?
> I'm using R v3.0.2 on OSX 10.7.5.
> Would this have anything to do with settings in /Library/Frameworks/R.framework/Versions/3.0/Resources/etc/Makeconf ? If so, I see nothing in there about i386: rather, -arch x86_64 is specified.
> Thanks in advance. Full error message below. I have the same issue if I just compile with SHLIB and try to load them (though it's fine if I compile with gcc -arch x86_64, then load the *.so files).
> I'd also love to know how to configure things so that SHLIB and BUILD call a particular compiler, and where I would add any path variables that need to be added for this to work.

That is in the OS X section of the same manual, with examples.

> ~Dan Rabosky
> R commands from bash:
> R CMD BUILD testpackage
> R CMD INSTALL testpackage_1.0.tar.gz
> Then:
> * installing to library ‘/Library/Frameworks/R.framework/Versions/3.0/Resources/library’
> * installing *source* package ‘testpackage’ ...
> ** libs
> gcc-4.0 -arch i386 -std=gnu99 -I/Library/Frameworks/R.framework/Resources/include -DNDEBUG  -I/usr/local/include    -fPIC  -g -O2 -c dtrates.c -o dtrates.o
> gcc-4.0 -arch i386 -std=gnu99 -I/Library/Frameworks/R.framework/Resources/include -DNDEBUG  -I/usr/local/include    -fPIC  -g -O2 -c treetraverse.c -o treetraverse.o
> gcc-4.0 -arch i386 -std=gnu99 -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -single_module -multiply_defined suppress -L/usr/local/lib -L/usr/local/lib -o testpackage.so dtrates.o treetraverse.o -F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework -Wl,CoreFoundation
> ld: warning: in /Library/Frameworks/R.framework/R, file was built for unsupported file format which is not the architecture being linked (i386)
> installing to /Library/Frameworks/R.framework/Versions/3.0/Resources/library/testpackage/libs
> ** R
> ** data
> ** preparing package for lazy loading
> ** help
> *** installing help indices
> ** building package indices
> ** testing if installed package can be loaded
> Error in dyn.load(file, DLLpath = DLLpath, ...) :
>    unable to load shared object '/Library/Frameworks/R.framework/Versions/3.0/Resources/library/testpackage/libs/testpackage.so':
>    dlopen(/Library/Frameworks/R.framework/Versions/3.0/Resources/library/testpackage/libs/testpackage.so, 6): no suitable image found.  Did find:
> 	/Library/Frameworks/R.framework/Versions/3.0/Resources/library/testpackage/libs/testpackage.so: mach-o, but wrong architecture
> Error: loading failed
> Execution halted
> ERROR: loading failed
> * removing ‘/Library/Frameworks/R.framework/Versions/3.0/Resources/library/testpackage’
> * restoring previous ‘/Library/Frameworks/R.framework/Versions/3.0/Resources/library/testpackage’
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Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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