[3.12] gh-110429: Fix race condition in "make regen-all" (GH-110433) (#110438)

gh-110429: Fix race condition in "make regen-all" (GH-110433)

"make regen-pegen" now creates a temporary file called "parser.c.new"
instead of "parser.new.c". Previously, if "make clinic" was run in
parallel with "make regen-all", clinic may try but fail to open
"parser.new.c" if the temporay file was removed in the meanwhile.
(cherry picked from commit fb6c4ed2bbb2a867d5f0b9a94656e4714be5d9c2)

Co-authored-by: Victor Stinner <vstinner@python.org>

diff --git a/Makefile.pre.in b/Makefile.pre.in
index a2e8458b62c98929c45f0b2e42c8a7ee948ceee6..d882c0cd6722406a2a53538cb031b5e632c1e7aa 100644 (file)
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -1396,8 +1396,8 @@ regen-pegen:
        PYTHONPATH=$(srcdir)/Tools/peg_generator $(PYTHON_FOR_REGEN) -m pegen -q c \
                $(srcdir)/Grammar/python.gram \
                $(srcdir)/Grammar/Tokens \
-               -o $(srcdir)/Parser/parser.new.c
-       $(UPDATE_FILE) $(srcdir)/Parser/parser.c $(srcdir)/Parser/parser.new.c
+               -o $(srcdir)/Parser/parser.c.new
+       $(UPDATE_FILE) $(srcdir)/Parser/parser.c $(srcdir)/Parser/parser.c.new
 
 .PHONY: regen-ast
 regen-ast: