Hi, I'm installing SciPy on my Win7 machine using Cygwin and its Python 2.6.7 version. I actually managed to successfully install Scipy not to long ago, but I had some rebasing issues that ended with me having to reinstall cygwin and those directories. I followed the basic outline of installing ATLAS plus LAPACK. I have Numpy. I made a site.cfg for my unzipped scipy-0.10.1 directory to make sure it would look in the right spots for the lapack, atlas, etc libraries. It's the same as the one I used for my successful install. But when I run: python setup.py config_fc --fcompiler=gnu95 install I get undefined reference errors. I can tell they are somehow due to the install script not including a clapack.h file. The location of the file is in my environment path, but perhaps not my python sys.path. However, it's in one of the include directories I place in the site.cfg too, so I'm not sure why the install is missing it. The last of the undefined references is: "build/temp.cygwin-1.7.15-i686-2.6/build/src.cygwin-1.7.15-i686-2.6/build/src.cygwin-1.7.15-i686-2.6/scipy/lib/lapack/clapackmodule.o:clapackmodule.c:(.data+0x1414): undefined reference to `_clapack_ztrtri' collect2: ld returned 1 exit status error: Command "/usr/bin/gfortran -Wall -Wall -shared build/temp.cygwin-1.7.15-i686-2.6/build/src.cygwin-1.7.15-i686-2.6/build/src.cygwin-1.7.15-i686-2.6/scipy/lib/lapack/clapackmodule.o build/temp.cygwin-1.7.15-i686-2.6/build/src.cygwin-1.7.15-i686-2.6/fortranobject.o -L/usr/local/atlas/lib -L/usr/lib/gcc/i686-pc-cygwin/4.5.3 -L/usr/lib/python2.6/config -Lbuild/temp.cygwin-1.7.15-i686-2.6 -llapack -lptf77blas -lptcblas -latlas -lpython2.6 -lgfortran -o build/lib.cygwin-1.7.15-i686-2.6/scipy/lib/lapack/clapack.dll" failed with exit status 1" I'll attach a copy of the results from: python -c 'from numpy.f2py.diagnose import run; run()'. Thanks in advance. -- Best, Greg