GH-137218: Fix unnecessary recompile of Programs/_freeze_module (#139241)

Author: savannahostrowski

Makefile.pre.in

@@ -3132,7 +3132,7 @@ JIT_DEPS = \
 jit_stencils.h @JIT_STENCILS_H@: $(JIT_DEPS)
 	@REGEN_JIT_COMMAND@
 
-Python/jit.o: $(srcdir)/Python/jit.c jit_stencils.h @JIT_STENCILS_H@
+Python/jit.o: $(srcdir)/Python/jit.c @JIT_STENCILS_H@
 	$(CC) -c $(PY_CORE_CFLAGS) -o $@ $<
 
 .PHONY: regen-jit

configure

@@ -2787,13 +2787,11 @@ AS_VAR_IF([jit_flags],
           [AS_VAR_APPEND([CFLAGS_NODIST], [" $jit_flags"])
            AS_VAR_SET([REGEN_JIT_COMMAND],
                       ["\$(PYTHON_FOR_REGEN) \$(srcdir)/Tools/jit/build.py ${ARCH_TRIPLES:-$host} --output-dir . --pyconfig-dir . --cflags=\"$CFLAGS_JIT\""])
-           AS_VAR_SET([JIT_STENCILS_H], ["jit_stencils.h"])
            AS_VAR_IF([Py_DEBUG],
                      [true],
                      [AS_VAR_APPEND([REGEN_JIT_COMMAND], [" --debug"])],
                      [])])
 AC_SUBST([REGEN_JIT_COMMAND])
-AC_SUBST([JIT_STENCILS_H])
 AC_MSG_RESULT([$tier2_flags $jit_flags])
 
 if test "$disable_gil" = "yes" -a "$enable_experimental_jit" != "no"; then
@@ -8175,29 +8173,31 @@ PY_STDLIB_MOD([xxlimited_35], [test "$TEST_MODULES" = yes], [test "$ac_cv_func_d
 
 # Determine JIT stencils header files based on target platform
 JIT_STENCILS_H=""
-case "$host" in
-  aarch64-apple-darwin*)
-    JIT_STENCILS_H="jit_stencils-aarch64-apple-darwin.h"
-    ;;
-  x86_64-apple-darwin*)
-    JIT_STENCILS_H="jit_stencils-x86_64-apple-darwin.h"
-    ;;
-  aarch64-pc-windows-msvc)
-    JIT_STENCILS_H="jit_stencils-aarch64-pc-windows-msvc.h"
-    ;;
-  i686-pc-windows-msvc)
-    JIT_STENCILS_H="jit_stencils-i686-pc-windows-msvc.h"
-    ;;
-  x86_64-pc-windows-msvc)
-    JIT_STENCILS_H="jit_stencils-x86_64-pc-windows-msvc.h"
-    ;;
-  aarch64-*-linux-gnu)
-    JIT_STENCILS_H="jit_stencils-$host.h"
-    ;;
-  x86_64-*-linux-gnu)
-    JIT_STENCILS_H="jit_stencils-$host.h"
-    ;;
-esac
+AS_VAR_IF([enable_experimental_jit], [no], 
+  [],
+  [case "$host" in
+    aarch64-apple-darwin*)
+      JIT_STENCILS_H="jit_stencils-aarch64-apple-darwin.h"
+      ;;
+    x86_64-apple-darwin*)
+      JIT_STENCILS_H="jit_stencils-x86_64-apple-darwin.h"
+      ;;
+    aarch64-pc-windows-msvc)
+      JIT_STENCILS_H="jit_stencils-aarch64-pc-windows-msvc.h"
+      ;;
+    i686-pc-windows-msvc)
+      JIT_STENCILS_H="jit_stencils-i686-pc-windows-msvc.h"
+      ;;
+    x86_64-pc-windows-msvc)
+      JIT_STENCILS_H="jit_stencils-x86_64-pc-windows-msvc.h"
+      ;;
+    aarch64-*-linux-gnu)
+      JIT_STENCILS_H="jit_stencils-$host.h"
+      ;;
+    x86_64-*-linux-gnu)
+      JIT_STENCILS_H="jit_stencils-$host.h"
+      ;;
+  esac])
 
 AC_SUBST([JIT_STENCILS_H])