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 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
