Update for Cython 3.x

Author: gjbex

source-code/cython/Pointers/.gitignore

@@ -0,0 +1 @@
+pointers_cython.c

source-code/cython/Pointers/Makefile

@@ -1,11 +1,11 @@
-VERSION = cpython-34m
-POINTERS_LIB = pointers.$(VERSION).so
+VERSION =  cpython-311-x86_64-linux-gnu
+CYTHON_LIB = pointers_cython.$(VERSION).so
 
-all: $(POINTERS_LIB)
+all: $(CYTHON_LIB)
 
-$(POINTERS_LIB): pointers.pyx
+$(CYTHON_LIB): pointers_cython.pyx
 	python setup.py build_ext --inplace
 
 clean:
 	python setup.py clean
-	rm -f pointers.c $(POINTERS_LIB)
+	$(RM) pointers_cython.c $(CYTHON_LIB)

source-code/cython/Pointers/README.md

@@ -2,7 +2,7 @@
 Simple example of using pointers in Cython code.
 
 ## What is it?
-1. `pointers.pyx`: code that computes a list of squares using a cdef
+1. `pointers_cython.pyx`: code that computes a list of squares using a cdef
     function that increments an integer value referred to by a pointer.
 1. `setup.py`: Python build script.
 1. `Makefile`: make file to build the extension.

source-code/cython/Pointers/pointers.pyx renamed to source-code/cython/Pointers/pointers_cython.pyx

@@ -4,5 +4,6 @@
 from Cython.Build import cythonize
 
 setup(
-    ext_modules=cythonize('pointers.pyx')
+    ext_modules=cythonize('pointers_cython.pyx',
+                          language_level='3str')
 )

source-code/cython/Pointers/setup.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 
-import pointers
+import pointers_cython as pointers
 
 
 print(pointers.squares(5))