From 8f6cff3b37c686dcf2b94163b201b9396a17fd10 Mon Sep 17 00:00:00 2001
From: David Hoese <david.hoese@ssec.wisc.edu>
Date: Mon, 12 Feb 2024 13:40:30 -0600
Subject: [PATCH] Fix Cython 3 and Numpy 2 compatibility

---
 .github/workflows/ci.yaml                | 2 +-
 pyproject.toml                           | 2 +-
 pyresample/ewa/_fornav.pyx               | 1 +
 pyresample/ewa/_ll2cr.pyx                | 2 ++
 pyresample/gradient/_gradient_search.pyx | 1 +
 5 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 65b71d6b5..165e01075 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -47,7 +47,7 @@ jobs:
         shell: bash -l {0}
         run: |
           python -m pip install \
-          -f https://7933911d6844c6c53a7d-47bd50c35cd79bd838daf386af554a83.ssl.cf2.rackcdn.com \
+          --index-url https://pypi.anaconda.org/scientific-python-nightly-wheels/simple/ \
           --no-deps --pre --upgrade \
           matplotlib \
           numpy \
diff --git a/pyproject.toml b/pyproject.toml
index 647781aa6..5e57fffce 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools", "wheel", "numpy", "Cython", "versioneer-518"]
+requires = ["setuptools", "wheel", "numpy", "Cython>=3", "versioneer-518"]
 build-backend = "setuptools.build_meta"
 
 [tool.ruff]
diff --git a/pyresample/ewa/_fornav.pyx b/pyresample/ewa/_fornav.pyx
index 53e33d3b0..6a57534b8 100644
--- a/pyresample/ewa/_fornav.pyx
+++ b/pyresample/ewa/_fornav.pyx
@@ -33,6 +33,7 @@ cimport cpython
 cimport cython
 cimport numpy
 
+numpy.import_array()
 
 cdef extern from "_fornav_templates.h":
     ctypedef float weight_type
diff --git a/pyresample/ewa/_ll2cr.pyx b/pyresample/ewa/_ll2cr.pyx
index 9e0e8669e..c1810f7a7 100644
--- a/pyresample/ewa/_ll2cr.pyx
+++ b/pyresample/ewa/_ll2cr.pyx
@@ -28,6 +28,8 @@ from pyproj import Proj
 cimport cython
 cimport numpy
 
+numpy.import_array()
+
 # column and rows can only be doubles for now until the PROJ.4 is linked directly so float->double casting can be done
 # inside the loop
 ctypedef fused cr_dtype:
diff --git a/pyresample/gradient/_gradient_search.pyx b/pyresample/gradient/_gradient_search.pyx
index 23ae5c3b5..0f0e80dfb 100644
--- a/pyresample/gradient/_gradient_search.pyx
+++ b/pyresample/gradient/_gradient_search.pyx
@@ -30,6 +30,7 @@ ctypedef np.double_t DTYPE_t
 cimport cython
 from libc.math cimport fabs, isinf
 
+np.import_array()
 
 @cython.boundscheck(False)
 @cython.wraparound(False)