Hello, I searched the forum, but couldn't find a post related to my problem. I am installing scipy via pip in cygwin environment pip install scipy Note: numpy version 1.10.1 was installed with pip install -U numpy /usr/bin/gfortran -Wall -g -Wall -g -shared -Wl,-gc-sections -Wl,-s build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/geom2.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/geom.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/global.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/io.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/libqhull.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/mem.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/merge.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/poly2.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/poly.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/qset.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/random.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/rboxlib.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/stat.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/user.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/usermem.o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/qhull/src/userprintf.o build/temp.cygwin-2.2.1-x86_64- 2.7/scipy/spatial/qhull/src/userprintf_rbox.o -L/usr/lib - L/usr/lib/gcc/x86_64-pc-cygwin/4.9.3 -L/usr/lib/python2.7/config - L/usr/lib -Lbuild/temp.cygwin-2.2.1-x86_64-2.7 -llapack -lblas - lpython2.7 -lgfortran -o build/lib.cygwin-2.2.1-x86_64- 2.7/scipy/spatial/qhull.dll building 'scipy.spatial.ckdtree' extension compiling C++ sources C compiler: g++ -fno-strict-aliasing -ggdb -O2 -pipe -Wimplicit- function-declaration -fdebug-prefix-map=/usr/src/ports/python/python- 2.7.10-1.x86_64/build=/usr/src/debug/python-2.7.10-1 -fdebug-prefix- map=/usr/src/ports/python/python-2.7.10-1.x86_64/src/Python- 2.7.10=/usr/src/debug/python-2.7.10-1 -DNDEBUG -g -fwrapv -O3 -Wall creating build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/ckdtree creating build/temp.cygwin-2.2.1-x86_64- 2.7/scipy/spatial/ckdtree/src compile options: '-I/usr/include/python2.7 - I/usr/lib/python2.7/site-packages/numpy/core/include - Iscipy/spatial/ckdtree/src -I/usr/lib/python2.7/site- packages/numpy/core/include -I/usr/include/python2.7 -c' g++: scipy/spatial/ckdtree/src/ckdtree_cpp_exc.cxx cc1plus: warning: command line option ‘-Wimplicit-function- declaration’ is valid for C/ObjC but not for C++ g++: scipy/spatial/ckdtree/src/ckdtree_query.cxx cc1plus: warning: command line option ‘-Wimplicit-function- declaration’ is valid for C/ObjC but not for C++ In file included from /usr/lib/python2.7/site- packages/numpy/core/include/numpy/ndarraytypes.h:1781:0, from /usr/lib/python2.7/site- packages/numpy/core/include/numpy/ndarrayobject.h:18, from /usr/lib/python2.7/site- packages/numpy/core/include/numpy/arrayobject.h:4, from scipy/spatial/ckdtree/src/ckdtree_query.cxx:15: /usr/lib/python2.7/site- packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:15:2: warning: #warning "Using deprecated NumPy API, disable it by " "#defining NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-Wcpp] #warning "Using deprecated NumPy API, disable it by " \ ^ In file included from scipy/spatial/ckdtree/src/ckdtree_query.cxx:31:0: scipy/spatial/ckdtree/src/ckdtree_cpp_methods.h:12:20: error: ‘npy_float64 infinity’ redeclared as different kind of symbol extern npy_float64 infinity; ^ In file included from /usr/include/python2.7/pyport.h:325:0, from /usr/include/python2.7/Python.h:58, from scipy/spatial/ckdtree/src/ckdtree_query.cxx:14: /usr/include/math.h:263:15: note: previous declaration ‘double infinity()’ extern double infinity _PARAMS((void)); ^ In file included from scipy/spatial/ckdtree/src/ckdtree_query.cxx:31:0: scipy/spatial/ckdtree/src/ckdtree_cpp_methods.h: In function ‘npy_float64 _distance_p(const npy_float64*, const npy_float64*, npy_float64, npy_intp, npy_float64)’: scipy/spatial/ckdtree/src/ckdtree_cpp_methods.h:139:17: error: invalid operands of types ‘const npy_float64 {aka const double}’ and ‘double()’ to binary ‘operator==’ else if (p==infinity) { ^ scipy/spatial/ckdtree/src/ckdtree_query.cxx: In function ‘PyObject* query_knn(const ckdtree*, npy_float64*, npy_intp*, const npy_float64*, npy_intp, npy_intp, npy_float64, npy_float64, npy_float64)’: scipy/spatial/ckdtree/src/ckdtree_query.cxx:431:111: error: cannot convert ‘double (*)()’ to ‘npy_float64 {aka double}’ for argument ‘9’ to ‘void __query_single_point(const ckdtree*, npy_float64*, npy_intp*, const npy_float64*, npy_intp, npy_float64, npy_float64, npy_float64, npy_float64)’ __query_single_point(self, dd_row, ii_row, xx_row, k, eps, p, distance_upper_bound, ::infinity); ^ In file included from /usr/lib/python2.7/site- packages/numpy/core/include/numpy/ndarrayobject.h:27:0, from /usr/lib/python2.7/site- packages/numpy/core/include/numpy/arrayobject.h:4, from scipy/spatial/ckdtree/src/ckdtree_query.cxx:15: /usr/lib/python2.7/site- packages/numpy/core/include/numpy/__multiarray_api.h: At global scope: /usr/lib/python2.7/site- packages/numpy/core/include/numpy/__multiarray_api.h:1634:1: warning: ‘int _import_array()’ defined but not used [-Wunused-function] _import_array(void) ^ cc1plus: warning: command line option ‘-Wimplicit-function- declaration’ is valid for C/ObjC but not for C++ In file included from /usr/lib/python2.7/site- packages/numpy/core/include/numpy/ndarraytypes.h:1781:0, from /usr/lib/python2.7/site- packages/numpy/core/include/numpy/ndarrayobject.h:18, from /usr/lib/python2.7/site- packages/numpy/core/include/numpy/arrayobject.h:4, from scipy/spatial/ckdtree/src/ckdtree_query.cxx:15: /usr/lib/python2.7/site- packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:15:2: warning: #warning "Using deprecated NumPy API, disable it by " "#defining NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-Wcpp] #warning "Using deprecated NumPy API, disable it by " \ ^ In file included from scipy/spatial/ckdtree/src/ckdtree_query.cxx:31:0: scipy/spatial/ckdtree/src/ckdtree_cpp_methods.h:12:20: error: ‘npy_float64 infinity’ redeclared as different kind of symbol extern npy_float64 infinity; ^ In file included from /usr/include/python2.7/pyport.h:325:0, from /usr/include/python2.7/Python.h:58, from scipy/spatial/ckdtree/src/ckdtree_query.cxx:14: /usr/include/math.h:263:15: note: previous declaration ‘double infinity()’ extern double infinity _PARAMS((void)); ^ In file included from scipy/spatial/ckdtree/src/ckdtree_query.cxx:31:0: scipy/spatial/ckdtree/src/ckdtree_cpp_methods.h: In function ‘npy_float64 _distance_p(const npy_float64*, const npy_float64*, npy_float64, npy_intp, npy_float64)’: scipy/spatial/ckdtree/src/ckdtree_cpp_methods.h:139:17: error: invalid operands of types ‘const npy_float64 {aka const double}’ and ‘double()’ to binary ‘operator==’ else if (p==infinity) { ^ scipy/spatial/ckdtree/src/ckdtree_query.cxx: In function ‘PyObject* query_knn(const ckdtree*, npy_float64*, npy_intp*, const npy_float64*, npy_intp, npy_intp, npy_float64, npy_float64, npy_float64)’: scipy/spatial/ckdtree/src/ckdtree_query.cxx:431:111: error: cannot convert ‘double (*)()’ to ‘npy_float64 {aka double}’ for argument ‘9’ to ‘void __query_single_point(const ckdtree*, npy_float64*, npy_intp*, const npy_float64*, npy_intp, npy_float64, npy_float64, npy_float64, npy_float64)’ __query_single_point(self, dd_row, ii_row, xx_row, k, eps, p, distance_upper_bound, ::infinity); ^ In file included from /usr/lib/python2.7/site- packages/numpy/core/include/numpy/ndarrayobject.h:27:0, from /usr/lib/python2.7/site- packages/numpy/core/include/numpy/arrayobject.h:4, from scipy/spatial/ckdtree/src/ckdtree_query.cxx:15: /usr/lib/python2.7/site- packages/numpy/core/include/numpy/__multiarray_api.h: At global scope: /usr/lib/python2.7/site- packages/numpy/core/include/numpy/__multiarray_api.h:1634:1: warning: ‘int _import_array()’ defined but not used [-Wunused-function] _import_array(void) ^ error: Command "g++ -fno-strict-aliasing -ggdb -O2 -pipe -Wimplicit- function-declaration -fdebug-prefix-map=/usr/src/ports/python/python- 2.7.10-1.x86_64/build=/usr/src/debug/python-2.7.10-1 -fdebug-prefix- map=/usr/src/ports/python/python-2.7.10-1.x86_64/src/Python- 2.7.10=/usr/src/debug/python-2.7.10-1 -DNDEBUG -g -fwrapv -O3 -Wall - I/usr/include/python2.7 -I/usr/lib/python2.7/site- packages/numpy/core/include -Iscipy/spatial/ckdtree/src - I/usr/lib/python2.7/site-packages/numpy/core/include - I/usr/include/python2.7 -c scipy/spatial/ckdtree/src/ckdtree_query.cxx - o build/temp.cygwin-2.2.1-x86_64- 2.7/scipy/spatial/ckdtree/src/ckdtree_query.o" failed with exit status 1 ---------------------------------------- Command "/usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build- vAliRx/scipy/setup.py';exec(compile(getattr(tokenize, 'open', open) (__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install -- record /tmp/pip-gxrCbK-record/install-record.txt --single-version- externally-managed --compile" failed with error code 1 in /tmp/pip- build-vAliRx/scipy