[R-SIG-Mac] Library not loaded: /usr/local/lib/libquadmath.0.dylib

[Simon Urbanek]

On Sep 3, 2014, at 4:18 AM, Xiao He <praguewatermelon at gmail.com> wrote:

> Hi all,
> 
> I tried to load a package which includes a shared object on one of my Macs,
> and I got an error message below, which suggests that the file "
> libquadmath.0.dylib" is missing in the /usr/local/lib folder. On my other
> Mac however, I have no problem loading the package, and the file "
> libquadmath.0.dylib" is in the /usr/local/lib folder. I wonder where this
> libquadmath.0.dylib file is from, and how I can install it on the computer
> where it is missing. Thanks!
> 

libquadmath is part of the Fortran compiler, it is not a standard library, so it will be only present if you install the compiler.

Note that the Mavericks build of R on CRAN also ships with the quadmath library and Mavericks CRAN package binaries use it from there. If you compile a package yourself and want others to be able to use it, you may want to change the path from /usr/local/lib/libquadmath.0.dylib to /Library/Frameworks/R.framework/Versions/3.1/Resources/lib/libquadmath.0.dylib via install_name_tool --- the same goes for libgfortran.3.dylib.

Cheers,
Simon



> library(WRScpp)
> Error in dyn.load(file, DLLpath = DLLpath, ...) :
>  unable to load shared object
> '/Library/Frameworks/R.framework/Versions/3.1/Resources/library/WRScpp/libs/WRScpp.so':
> 
> dlopen(/Library/Frameworks/R.framework/Versions/3.1/Resources/library/WRScpp/libs/WRScpp.so,
> 6): Library not loaded: /usr/local/lib/libquadmath.0.dylib
>  Referenced from:
> /Library/Frameworks/R.framework/Versions/3.1/Resources/library/WRScpp/libs/WRScpp.so
>  Reason: image not found
> Error: package or namespace load failed for ‘WRScpp’​
> 
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> 
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