From 51bea5ecd6d7aa64fb310594bc5a5fc65ce902a7 Mon Sep 17 00:00:00 2001
From: Brett Cannon <brett@python.org>
Date: Thu, 13 Aug 2026 12:06:23 -0700
Subject: [PATCH 1/3] [3.12] Set `--argv0` for wasmtime

---
 Tools/wasm/wasm_build.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Tools/wasm/wasm_build.py b/Tools/wasm/wasm_build.py
index f6e262965665510..6582b570a816b54 100755
--- a/Tools/wasm/wasm_build.py
+++ b/Tools/wasm/wasm_build.py
@@ -318,6 +318,7 @@ def _check_wasi():
             "wasmtime run "
             "--wasm max-wasm-stack=8388608 "
             "--wasi preview2 "
+            "--argv0 /{relbuilddir}/python.wasm "
             "--dir {srcdir}::/ "
             "--env PYTHONPATH=/{relbuilddir}/build/lib.wasi-wasm32-{version}:/Lib"
         ),

From 77c6b4178a966eb0e3577853244b4727fd63de8a Mon Sep 17 00:00:00 2001
From: Brett Cannon <brett@python.org>
Date: Thu, 13 Aug 2026 12:57:48 -0700
Subject: [PATCH 2/3] Add a news entry

---
 .../next/Build/2026-08-13-12-57-27.gh-issue-155757._5cg0h.rst  | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Build/2026-08-13-12-57-27.gh-issue-155757._5cg0h.rst

diff --git a/Misc/NEWS.d/next/Build/2026-08-13-12-57-27.gh-issue-155757._5cg0h.rst b/Misc/NEWS.d/next/Build/2026-08-13-12-57-27.gh-issue-155757._5cg0h.rst
new file mode 100644
index 000000000000000..2aec7f28d24f1a1
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2026-08-13-12-57-27.gh-issue-155757._5cg0h.rst
@@ -0,0 +1,3 @@
+Set the `--argv0` argument to wasmtime for WASI builds so the test suite
+passes. Otherwise the calculated paths to the stdlib for frozen modules is
+incorrect.

From f24101814dbbf7cb06672741580986d93cf85550 Mon Sep 17 00:00:00 2001
From: Brett Cannon <brett@python.org>
Date: Thu, 13 Aug 2026 13:02:02 -0700
Subject: [PATCH 3/3] Fix markdown formatting in news entry

---
 .../next/Build/2026-08-13-12-57-27.gh-issue-155757._5cg0h.rst   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Misc/NEWS.d/next/Build/2026-08-13-12-57-27.gh-issue-155757._5cg0h.rst b/Misc/NEWS.d/next/Build/2026-08-13-12-57-27.gh-issue-155757._5cg0h.rst
index 2aec7f28d24f1a1..5113bc93d937015 100644
--- a/Misc/NEWS.d/next/Build/2026-08-13-12-57-27.gh-issue-155757._5cg0h.rst
+++ b/Misc/NEWS.d/next/Build/2026-08-13-12-57-27.gh-issue-155757._5cg0h.rst
@@ -1,3 +1,3 @@
-Set the `--argv0` argument to wasmtime for WASI builds so the test suite
+Set the ``--argv0`` argument to wasmtime for WASI builds so the test suite
 passes. Otherwise the calculated paths to the stdlib for frozen modules is
 incorrect.