Adapt Cython setup

kdtree/Makefile

 INCLUDE_DIRS = -I/usr/include/python3.8
-EXE = main
+EXE = kdtree
 CXX = g++
 CPPFLAGS = -O2 -g -Wno-unused-result -Wsign-compare -pthread $(INCLUDE_DIRS)
 LDFLAGS += -Wl,--unresolved-symbols=ignore-all
+MACROS = -DNPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION
 LDLIBS = -lcrypto -lfmt
 EXT_SUFFIX := $(shell python3 -c "import sysconfig; print(sysconfig.get_config_var('EXT_SUFFIX'))")
 EXT = $(EXE)$(EXT_SUFFIX)
@@ -28,7 +29,7 @@ nopython: $(EXE)
 
 %: %.cpp
 	@echo "[C++ Compiling $^ -> $@]"
-	$(LINK.cpp) $^ $(LOADLIBES) $(LDLIBS) -o $@
+	$(LINK.cpp) $^ $(LOADLIBES) $(LDLIBS) $(MACROS) -o $@
 
 # Run without Python runtime
 runnopython: $(EXE)

kdtree/main.pyx → kdtree/kdtree.pyx

 # distutils: language = c++
-
+# cython: language_level = 3
 import numpy as np
 cimport numpy as cnp
 

kdtree/setup.py

@@ -4,9 +4,10 @@ from Cython.Build import cythonize
 
 extensions = [
     Extension(
-        "main",
+        "kdtree",
         language="c++",
-        sources=["main.pyx"],
+        define_macros=[("NPY_NO_DEPRECATED_API", "NPY_1_7_API_VERSION")],
+        sources=["kdtree.pyx"],
         libraries=["crypto", "fmt"],
     ),
 ]