DNM: enable the experimental JIT in 3.13+

Author: tianon

3.10/slim-bookworm/Dockerfile

@@ -151,6 +151,11 @@ RUN set -eux; \
 		wget \
 		xz-utils \
 		zlib1g-dev \
+# hack hack hack: https://github.com/python/cpython/blob/3.13/Tools/jit/README.md
+{{ def llvmVersion: if rcVersion == "3.13" then "18" else "19" end -}}
+		clang-{{ llvmVersion }} \
+		llvm-{{ llvmVersion }} \
+		python3 \
 	; \
 	\
 {{ ) else "" end -}}
@@ -192,6 +197,10 @@ RUN set -eux; \
 		$(test "${gnuArch%%-*}" != 'riscv64' && echo '--with-lto') \
 {{ ) end -}}
 		--with-ensurepip \
+{{ if IN(rcVersion; "3.9", "3.10", "3.11", "3.12") then "" else ( -}}
+# https://github.com/docker-library/python/issues/947
+		--enable-experimental-jit=yes \
+{{ ) end -}}
 	; \
 	nproc="$(nproc)"; \
 {{ if is_alpine then ( -}}