Date: Wed, 14 Oct 2015 17:06:23 +0000 From: bugzilla-noreply@freebsd.org To: python@FreeBSD.org Subject: [Bug 203638] math/py-numpy: Undefined symbol "cblas_sgemm" Message-ID: <bug-203638-21822-2T0AGW8gvn@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-203638-21822@https.bugs.freebsd.org/bugzilla/> References: <bug-203638-21822@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203638 --- Comment #6 from John Hein <z7dr6ut7gs@snkmail.com> --- If I make this change to the numpy Makefile: Index: Makefile =================================================================== --- Makefile (revision 399233) +++ Makefile (working copy) @@ -71,7 +71,7 @@ pre-configure-NETLIB-on: @${REINPLACE_CMD} -e "s|%%BLASNAME%%|atlas|" \ -e "s|%%LIBRARIES%%|atlas_libs|" \ - -e "s|%%BLASLIBS%%|blas|" \ + -e "s|%%BLASLIBS%%|blas, cblas|" \ -e "s|%%LAPACKLIBS%%|lapack|" \ ${WRKSRC}/site.cfg (pardon the inline rather than attached patch, but it's simple enough) And then I install math/cblas before building math/py-numpy with NETLIB, then the import does not trigger the undefined symbol problem (and ldd(1) shows multiarray.so linked with libcblas). Also, if I leave the same change in the Makefile and uninstall cblas, then the multiarray.so that is built is not link with either libblas or libcblas. How useful it is, I don't know (maybe just doesn't perform as well???). That is a totally untested guess. But it seems to me that if we specify that it should use blas & cblas libs and can't find one or both, it should fail to build. But it seems numpy quietly builds itself without support for the libs specified in the configuration. Hmm... well, maybe not completely quiet (but certainly not fatal to the build): /usr/ports/math/py-numpy/work/numpy-1.10.0/numpy/distutils/system_info.py:1651: UserWarning: Atlas (http://math-atlas.sourceforge.net/) libraries not found. Directories to search for the libraries can be specified in the numpy/distutils/site.cfg file (section [atlas]) or by setting the ATLAS environment variable. warnings.warn(AtlasNotFoundError.__doc__) If the above Makefile change is used, it should also probably add math/cblas to LIB_DEPENDS. -- You are receiving this mail because: You are the assignee for the bug.
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