[3.11] gh-103053: Fix make check-clean-src: check "python" program (GH-110449) (#110454)

gh-103053: Fix make check-clean-src: check "python" program (GH-110449)

"make check-clean-src" now also checks if the "python" program is
found in the source directory: fail with an error if it does exist.
(cherry picked from commit a155f9f)

Co-authored-by: Victor Stinner <[email protected]>

Author: miss-islington

Makefile.pre.in

@@ -592,7 +592,8 @@ build_wasm: check-clean-src $(BUILDPYTHON) platform oldsharedmods python-config
 # Check that the source is clean when building out of source.
 check-clean-src:
 	@if test -n "$(VPATH)" -a \( \
-	    -f "$(srcdir)/Programs/python.o" \
+	    -f "$(srcdir)/$(BUILDPYTHON)" \
+	    -o -f "$(srcdir)/Programs/python.o" \
 	    -o -f "$(srcdir)\Python/frozen_modules/importlib._bootstrap.h" \
 	\); then \
 		echo "Error: The source directory ($(srcdir)) is not clean" ; \

Misc/NEWS.d/next/Build/2023-10-06-02-15-23.gh-issue-103053.--7JUF.rst

@@ -0,0 +1,3 @@
+"make check-clean-src" now also checks if the "python" program is found in
+the source directory: fail with an error if it does exist. Patch by Victor
+Stinner.