This is intentional. Please note what the R-admin manual says about
--with-lapack, including 'definitely *not* recommended'
If you are concerned about performance you definitely do not want to use
shared R, not a shared BLAS.
On Thu, 3 Jul 2008, Bjørn-Helge Mevik wrote:
Dear developeRs,
I'm trying to build R (2.7.1, on an x86_64 running Linux, but I believe
I have observed this on x86 and with earlier versions of R as well)
using external BLAS and LAPACK libraries _and_ generating libR.so,
libRblas.so and libRlapack.so.
Without --enable-BLAS-shlib, configure is able to find and use the
external LAPACK library:
./configure \
--with-blas="-L/site/intel/cmkl/8.1/lib/em64t -lmkl -lvml -lguide -lpthread" \
--with-lapack="-L/site/intel/cmkl/8.1/lib/em64t -lmkl_lapack64 -lmkl" \
--enable-R-shlib
[...]
External libraries: readline, BLAS(generic), LAPACK(generic)
Additional capabilities: PNG, JPEG, iconv, MBCS, NLS
Options enabled: shared R library, R profiling, Java
However, if I add --enable-BLAS-shlib, the external LAPACK will not be
used:
./configure \
--with-blas="-L/site/intel/cmkl/8.1/lib/em64t -lmkl -lvml -lguide -lpthread" \
--with-lapack="-L/site/intel/cmkl/8.1/lib/em64t -lmkl_lapack64 -lmkl" \
--enable-R-shlib --enable-BLAS-shlib
[...]
checking for zgeev_ in -L/site/intel/cmkl/8.1/lib/em64t -lmkl_lapack64 -lmkl...
no
checking for zgeev_ in -llapack... no
[...]
External libraries: readline, BLAS(generic)
Additional capabilities: PNG, JPEG, iconv, MBCS, NLS
Options enabled: shared R library, shared BLAS, R profiling, Java
From config.log, it seems configure is trying to link with libRblas when
testing for LAPACK -- but that has not been built yet:
configure:37825: checking for zgeev_
configure:37889: gcc -std=gnu99 -o conftest -g -O2 -fpic -I/usr/local/include
-L/usr/local/lib64 conftest.c
-L$(R_HOME)/lib$(R_ARCH) -lRblas -lg2c -lm -ldl -lm >&5
/usr/bin/ld: cannot find -lRblas
[...]
configure:37924: checking for zgeev_ in -L/site/intel/cmkl/8.1/lib/em64t
-lmkl_lapack64 -lmkl
configure:37962: gcc -std=gnu99 -o conftest -g -O2 -fpic -I/usr/local/include
-L/usr/local/lib64 conftest.c
-L/site/intel/cmkl/8.1/lib/em64t -lmkl_lapack64 -lmkl -L$(R_HOME)/lib$(R_ARCH) -lRblas
-lg2c -lm -ldl -lm >&
5
/usr/bin/ld: cannot find -lRblas
[...]
configure:37993: checking for zgeev_ in -llapack
configure:38036: gcc -std=gnu99 -o conftest -g -O2 -fpic -I/usr/local/include
-L/usr/local/lib64 conftest.c
-llapack -L$(R_HOME)/lib$(R_ARCH) -lRblas -lg2c -lm -ldl -lm >&5
/usr/bin/ld: cannot find -lRblas
(Removing the --enable-R-shlib does not make a difference in this
respect.)
Is this intentional or a bug? Am I doing something wrong here?
--
Regards,
Bjørn-Helge Mevik
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--
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
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