python: add FindNumPy cmake module

adds support for numpy installations that aren't in system directories

python/CMakeLists.txt

@@ -1,14 +1,17 @@
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_LIST_DIR}/scikit-build-cmake)
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_LIST_DIR}/eyescale-cmake)
 include(UseCython)
 include(FindPythonExtensions)
-
+include(FindNumPy)
 
 find_package(PythonInterp REQUIRED)
 find_package(PythonLibs REQUIRED)
 find_package(PythonExtensions REQUIRED)
 find_package(Cython REQUIRED)
+find_package(NumPy REQUIRED)
 
 include_directories(${ZFP_SOURCE_DIR}/include)
+include_directories(${PYTHON_NUMPY_INCLUDE_DIR})
 
 # cannot reuse the zfp target, use _zfp instead
 add_cython_target(_zfp zfp.pyx C PY2)

python/eyescale-cmake/FindNumPy.cmake

@@ -0,0 +1,41 @@
+# Find the Python NumPy package
+# PYTHON_NUMPY_INCLUDE_DIR
+# PYTHON_NUMPY_FOUND
+# will be set by this script
+
+# cmake_minimum_required(VERSION 2.6)
+
+if(NOT PYTHON_EXECUTABLE)
+  if(NumPy_FIND_QUIETLY)
+    find_package(PythonInterp QUIET)
+  else()
+    find_package(PythonInterp)
+    set(__numpy_out 1)
+  endif()
+endif()
+
+if (PYTHON_EXECUTABLE)
+  # Find out the include path
+  execute_process(
+    COMMAND "${PYTHON_EXECUTABLE}" -c
+            "from __future__ import print_function\ntry: import numpy; print(numpy.get_include(), end='')\nexcept:pass\n"
+            OUTPUT_VARIABLE __numpy_path)
+  # And the version
+  execute_process(
+    COMMAND "${PYTHON_EXECUTABLE}" -c
+            "from __future__ import print_function\ntry: import numpy; print(numpy.__version__, end='')\nexcept:pass\n"
+    OUTPUT_VARIABLE __numpy_version)
+elseif(__numpy_out)
+  message(STATUS "Python executable not found.")
+endif(PYTHON_EXECUTABLE)
+
+find_path(PYTHON_NUMPY_INCLUDE_DIR numpy/arrayobject.h
+  HINTS "${__numpy_path}" "${PYTHON_INCLUDE_PATH}" NO_DEFAULT_PATH)
+
+if(PYTHON_NUMPY_INCLUDE_DIR)
+  set(PYTHON_NUMPY_FOUND 1 CACHE INTERNAL "Python numpy found")
+endif(PYTHON_NUMPY_INCLUDE_DIR)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(NumPy REQUIRED_VARS PYTHON_NUMPY_INCLUDE_DIR
+                                        VERSION_VAR __numpy_version)

python/eyescale-cmake/LICENSE.txt

@@ -0,0 +1,26 @@
+Unless otherwise noted in the file, all files in this directory are
+licensed under the BSD license, reproduced below.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+- Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+- Neither the name of Eyescale Software GmbH nor the names of its
+  contributors may be used to endorse or promote products derived from this
+  software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.