[Rcpp-devel] LLVM

[Douglas Bates]

On Sat, Jul 23, 2011 at 3:56 PM, Jan de Leeuw <deleeuw at stat.ucla.edu> wrote:
> I compile a 64bit CLI version of the current R-devel from svn, with about 1000 add-on packages, in Lion, using the clang and clang++ compilers
> from the LLVM project (and gfortran 4.7). This generally works well, the compiles are really fast, but for RcppArmadillo I get
>
>
>
> ** testing if installed package can be loaded
> Error in dyn.load(file, DLLpath = DLLpath, ...) :
>  unable to load shared object '/usr/local/R/lib/R/library/RcppArmadillo/libs/RcppArmadillo.so':
>  dlopen(/usr/local/R/lib/R/library/RcppArmadillo/libs/RcppArmadillo.so, 6): Symbol not found: __ZN4arma12arma_version5majorE
>  Referenced from: /usr/local/R/lib/R/library/RcppArmadillo/libs/RcppArmadillo.so
>  Expected in: flat namespace
> in /usr/local/R/lib/R/library/RcppArmadillo/libs/RcppArmadillo.so
> Error: loading failed
> Execution halted
> ERROR: loading failed
> * removing ‘/usr/local/R/lib/R/library/RcppArmadillo’
> * restoring previous ‘/usr/local/R/lib/R/library/RcppArmadillo’

That was the strange error that I encountered with gcc-4.5 when I was
*not* using optimization.  I had turned off optimization because I
wanted to use gdb on the package and suddenly that error occurred.
When I recompiled with -O2 the error went away.