I have a problem that seems related to the one below. I'm trying to build and install Numeric 17.2.0 using the lapack and blas libraries under Python 2.0 on Red Hat 6.2 with the The build and install go fine, but when I run python and import LinearAlgebra, I get the following message: Python 2.0 (#1, Nov 13 2000, 14:15:52) [GCC egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)] on linux2 Type "copyright", "credits" or "license" for more information.
from Numeric import * from LinearAlgebra import * Traceback (most recent call last): File "<stdin>", line 1, in ? File "/usr/local/lib/python2.0/site-packages/Numeric/LinearAlgebra.py", line 8, in ? import lapack_lite ImportError: /usr/local/lib/python2.0/site-packages/Numeric/lapack_lite.so: undefined symbol: dgesvd_
I did try relinking with g77, as Scott's earlier message suggested: [root@harmony LALITE]# g77 -shared build/temp.linux-i686-2.0/Src/lapack_litemodule.o -L/usr/lib/lapack -o build/lib.linux-i686-2.0/lapack_lite.so ld: cannot open crtbeginS.o: No such file or directory [root@harmony LALITE]# But I don't know much about g77 (or gcc, for that matter), so I didn't know how to diagnose the error. I'm also not sure I'd know what to do next if the link step had worked! I'd sure appreciate some help with this... Thanks! David "Scott M. Ransom" wrote:
Frank Horowitz wrote:
However, when I coerced the distutils system to get around that bug (by specifying "/usr/lib " with a trailing blank for the BLASLIBDIR and LAPACKLIBDIR variables in setup.py) the same problem (i.e. an "ImportError: /usr/lib/liblapack.so.3: undefined symbol: e_wsfe" in importing lapack_lite) ultimately manifested itself.
This problem is easily fixed (at least on linux) by performing the link of lapack_lite.so with g77 instead of gcc (this is required because the lapack and/or blas libraries are based on fortran object files...).
For instance the out-of-box link command on my machine (Debian 2.2) is:
gcc -shared build/temp.linux2/Src/lapack_litemodule.o -L/usr/local/lib -L/usr/lib -llapack -lblas -o build/lib.linux2/lapack_lite.so
Simply change the 'gcc' to 'g77' and everything works nicely.
Not sure if this is specific to Linux or not...
Scott
-- Scott M. Ransom Address: Harvard-Smithsonian CfA Phone: (617) 495-4142 60 Garden St. MS 10 email: ransom@cfa.harvard.edu Cambridge, MA 02138 GPG Fingerprint: 06A9 9553 78BE 16DB 407B FFCA 9BFA B6FF FFD3 2989 _______________________________________________ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net http://lists.sourceforge.net/mailman/listinfo/numpy-discussion