bpo-45571: use PY_CFLAGS_NODIST for shared Modules/Setup (GH-29161)

(cherry picked from commit f6e8b80d20159596cf641305bad3a833bedd2f4f)

Co-authored-by: Christian Heimes <christian@python.org>
diff --git a/Misc/NEWS.d/next/Build/2021-10-22-15-28-29.bpo-45571.yY8NsJ.rst b/Misc/NEWS.d/next/Build/2021-10-22-15-28-29.bpo-45571.yY8NsJ.rst
new file mode 100644
index 0000000..f2042d1
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2021-10-22-15-28-29.bpo-45571.yY8NsJ.rst
@@ -0,0 +1,2 @@
+``Modules/Setup`` now use ``PY_CFLAGS_NODIST`` instead of ``PY_CFLAGS`` to
+compile shared modules.
diff --git a/Modules/makesetup b/Modules/makesetup
index fefe3fd..1a76783 100755
--- a/Modules/makesetup
+++ b/Modules/makesetup
@@ -231,7 +231,7 @@
 			*) src='$(srcdir)/'"$srcdir/$src";;
 			esac
 			case $doconfig in
-			no)	cc="$cc \$(CCSHARED) \$(PY_CFLAGS) \$(PY_CPPFLAGS)";;
+			no)	cc="$cc \$(CCSHARED) \$(PY_CFLAGS_NODIST) \$(PY_CPPFLAGS)";;
 			*)
 				cc="$cc \$(PY_BUILTIN_MODULE_CFLAGS)";;
 			esac