Conditional usage of numpy.distutils

support py3.12.
numpy really really not conditional

.github/workflows/build.yml

@@ -10,8 +10,6 @@ jobs:
       # used by .ci/build-deps.sh for Make builds
       BRBASE: ${{ matrix.base }}
       BRPVXS: ${{ matrix.pvxs }}
-      # cf. https://github.com/numpy/numpy/issues/22623
-      SETUPTOOLS_USE_DISTUTILS: stdlib
     strategy:
       fail-fast: false
       matrix:

configure/CONFIG_PY

@@ -23,12 +23,6 @@ PROD_DEPLIB_DIRS += $(PY_LIBDIRS)
 
 INCLUDES += $(PY_INCDIRS:%=-I%)
 
-ifeq ($(HAVE_NUMPY),YES)
-TARGET_CPPFLAGS += -DHAVE_NUMPY
-else
-$(error numpy required)
-endif
-
 #LIB_SYS_LIBS += python$(PY_LD_VER)
 #PROD_SYS_LIBS += python$(PY_LD_VER)
 

makehelper.py

@@ -5,7 +5,6 @@
 Emits something like the following
 
 PY_OK := YES  # indicates success of this script
-HAVE_NUMPY := YES/NO
 PY_VER := 2.6
 PY_INCDIRS := /path ...
 PY_LIBDIRS := /path ...
@@ -26,18 +25,22 @@
         pass
     out = open(sys.argv[1], 'w')
 
-from distutils.sysconfig import get_config_var, get_python_inc
+try:
+    from sysconfig import get_config_var, get_python_inc
+except ImportError:
+    from distutils.sysconfig import get_config_var, get_python_inc
 
 incdirs = [get_python_inc()]
 libdir = get_config_var('LIBDIR') or ''
 
-have_np='NO'
 try:
     from numpy.distutils.misc_util import get_numpy_include_dirs
-    incdirs = get_numpy_include_dirs()+incdirs
-    have_np='YES'
 except ImportError:
-    pass
+    def get_numpy_include_dirs():
+        from numpy import get_include
+        return [get_include()]
+
+incdirs = get_numpy_include_dirs()+incdirs
 
 print('TARGET_CFLAGS +=',get_config_var('BASECFLAGS'), file=out)
 print('TARGET_CXXFLAGS +=',get_config_var('BASECFLAGS'), file=out)
@@ -51,7 +54,6 @@
 print('PY_LD_VER :=',ldver, file=out)
 print('PY_INCDIRS :=',' '.join(incdirs), file=out)
 print('PY_LIBDIRS :=',libdir, file=out)
-print('HAVE_NUMPY :=',have_np, file=out)
 
 try:
     import asyncio

setup.py

@@ -8,7 +8,11 @@
 from setuptools_dso import Extension, setup, cythonize
 
 import numpy
-from numpy.distutils.misc_util import get_numpy_include_dirs
+try:
+    from numpy.distutils.misc_util import get_numpy_include_dirs
+except ImportError:
+    def get_numpy_include_dirs():
+        return [numpy.get_include()]
 
 import epicscorelibs.path
 import epicscorelibs.version