On Mon, 26 Sep 2005, Jennifer Lai wrote: > Hi, > I checked config.log and BLAS_LIBS was not set. However, I have set > BLAS_LIBS='-L/usr/lib64 -lblas' in config.site file. > I can't figure out why BLAS_LIBS is not set, when PGI compiler is used. When > gcc is used, BLAS_LIBS need not be set in config.site and automatically get > picked up by the configuration script. > > Here is a snapshot of the configuration script output (for buidling R with > PGI compiler): > checking for complex.h... yes > checking for double complex... no > checking for sgemm_ in -L/usr/lib64 -lblas... yes > checking whether double complex BLAS can be used... no > > Is there other thing I should look into in the config.log?
You need to look for the evidence for the line > checking for sgemm_ in -L/usr/lib64 -lblas... yes in config.log. I very much doubt that -L/usr/lib64 helps you: surely that should be in your library path. But you will probably find you cannot mix code compiled under different compilers, especially as -lblas is likely to be Fortran compiled with g77. (You may need -lblas -lg2c, but you would be better off using the BLAS built into R.) > Your help is very much appreicated. > > > Thanks, > Jennifer > > > Prof Brian Ripley wrote: > >> On Sat, 24 Sep 2005, Jennifer Lai wrote: >> >> >>> Hi, >>> How does complex.h used in R? Whether a compiler support complex.h >>> or not, does it affect R's performance? >>> >> >> complex.h will only used in future (2.2.0-to-be) versions of R, and only >> if configure finds enough C99 support. Otherwise R's own C-level complex >> support is used, as it always was. One would expect the OS's support to >> be faster and more accurate (but one could be disappointed, we have >> found). >> >> >>> I used PGI compiler to build >>> R-devel on AMD Opteron, but the configuration file failed to link BLAS >>> library despite the fact it is located in the usual location, >>> /usr/lib64. >>> >> >> Look in config.log to find out why. >> >> >>> PGI said they don't support complex.h. R configuration >>> script printed out that doublecomplex is not supported. >>> >> >> That is *FORTRAN* DOUBLE COMPLEX, and that does affect the operation of R, >> as without it you will not have complex linear algebra support. >> >> >>> Are "supporting >>> complex.h" and "linking BLAS library" related? >>> >> >> No. They are completely orthoogonal concepts. >> >> > > > -- Brian D. Ripley, [EMAIL PROTECTED] 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 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
