From 77a11c9d3fa05bff9446506d4d55417470902222 Mon Sep 17 00:00:00 2001
From: SubbaraoGarlapati <sgarlapati9@gmail.com>
Date: Wed, 10 Jun 2026 13:03:22 -0400
Subject: [PATCH] [cinderx] Build free-threaded musllinux wheels

Summary:
Publish free-threaded (cp314t) musllinux wheels alongside the existing
manylinux FT and non-FT musllinux wheels.

- Add cp314t-musllinux_{x86_64,aarch64} to the cibuildwheel build list
  and drop the stale TODO about musllinux/FT issues.
- Exclude test_concurrent_initialization_subinterpreter from the PGO
  profiling workload. It is flaky under free-threading (concurrent
  subinterpreter init of the _datetime C extension) and was failing the
  workload, which aborts the wheel build. check=True is kept so any other
  test failure still fails the build.
- On Linux, build the musllinux wheels first (FT first) in CI so a
  musllinux/FT failure surfaces quickly instead of only after all the
  manylinux wheels have built. cibuildwheel builds in a fixed order, so
  --only is used to force musllinux ahead of manylinux.

Test Plan:
CI build_wheels job: musllinux wheels build first on Linux; the PGO
workload no longer aborts on the flaky datetime subinterpreter test.

Tasks: T270479926
---
 .github/workflows/ci.yml | 14 ++++++++++++++
 pyproject.toml           |  3 ++-
 setup.py                 |  5 +++++
 3 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2fb7998ab..14c4cbefd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -84,8 +84,22 @@ jobs:
       - name: Install cibuildwheel
         run: python -m pip install cibuildwheel
 
+      # On Linux, build the musllinux wheels first (free-threaded first) so a
+      # musllinux/FT failure surfaces quickly instead of only after all the
+      # manylinux wheels have built.  cibuildwheel builds in a fixed order
+      # (manylinux before musllinux), so the order is forced here with --only.
+      - name: Build musllinux wheels first (Linux)
+        if: runner.os == 'Linux'
+        run: |
+          arch=$(uname -m)
+          python -m cibuildwheel --only "cp314t-musllinux_${arch}" --output-dir wheelhouse
+          python -m cibuildwheel --only "cp314-musllinux_${arch}" --output-dir wheelhouse
+
       - name: Build wheels
         run: python -m cibuildwheel --output-dir wheelhouse
+        env:
+          # musllinux already built above on Linux; build everything else here.
+          CIBW_SKIP: ${{ runner.os == 'Linux' && '*-musllinux_*' || '' }}
 
   build_sdist:
     name: Build source distribution
diff --git a/pyproject.toml b/pyproject.toml
index 138e1eda9..fe9845fe8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,14 +33,15 @@ filterwarnings = [
 ]
 
 [tool.cibuildwheel]
-# TODO(D107415749): muxllinux still has issues with FT.
 build = [
     "cp314-manylinux_x86_64",
     "cp314t-manylinux_x86_64",
     "cp314-musllinux_x86_64",
+    "cp314t-musllinux_x86_64",
     "cp314-manylinux_aarch64",
     "cp314t-manylinux_aarch64",
     "cp314-musllinux_aarch64",
+    "cp314t-musllinux_aarch64",
     "cp314-macosx_arm64",
     "cp314-win_amd64",
 ]
diff --git a/setup.py b/setup.py
index 5bd03c155..6292d63af 100644
--- a/setup.py
+++ b/setup.py
@@ -202,6 +202,11 @@ def print_section(title: str) -> None:
 import sys
 sys.argv.append("--pgo")
 
+# TODO(T270479926): test_concurrent_initialization_subinterpreter is flaky
+# under free-threading (concurrent subinterpreter init of the _datetime C
+# extension) and shouldn't gate the PGO wheel build.
+sys.argv += ["--ignore", "test_concurrent_initialization_subinterpreter"]
+
 def main():
     # This import must not be in the module body as it will start the tests
     # running, and those using multiprocessing will fail because the initial