gh-149353: Preserve JIT shim object during PGO clean (#149387)

Author: diegorusso

Makefile.pre.in

@@ -3330,7 +3330,9 @@ docclean:
 # data.  The PGO data is only valid if source code remains unchanged.
 .PHONY: clean-retain-profile
 clean-retain-profile: pycremoval
-	find . -name '*.[oa]' -exec rm -f {} ';'
+	# Keep the generated JIT shim objects with the rest of the JIT generated
+	# files: they are regenerated as a group and tracked by .jit-stamp.
+	find . -name '*.[oa]' ! -name 'jit_shim*.o' -exec rm -f {} ';'
 	find . -name '*.s[ol]' -exec rm -f {} ';'
 	find . -name '*.so.[0-9]*.[0-9]*' -exec rm -f {} ';'
 	find . -name '*.lto' -exec rm -f {} ';'

Misc/NEWS.d/next/Build/2026-05-04-23-07-45.gh-issue-149353.XfM8aQ.rst

@@ -0,0 +1,2 @@
+Avoid unnecessary JIT-related rebuilds during ``make install`` after
+``--enable-optimizations`` builds.