fasttext-wheel: add build-fasttext-wheel.yml for riscv64 wheels

.github/workflows/build-fasttext-wheel.yml

@@ -0,0 +1,101 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+# This workflow is based on: https://github.com/messense/fasttext-wheel/blob/master/.github/workflows/Linux.yml
+name: Build fasttext-wheel wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'fasttext-wheel version to build (facebookresearch/fastText git tag, e.g. v0.9.2)'
+        required: true
+        default: 'v0.9.2'
+  pull_request:
+    paths:
+      - '.github/workflows/build-fasttext-wheel.yml'
+      - 'patches/fasttext-wheel/**'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || 'v0.9.2' }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read  # to fetch code (actions/checkout)
+
+env:
+  # `inputs.version` is empty on pull_request events; default to v0.9.2 there.
+  FASTTEXT_WHEEL_VERSION: ${{ inputs.version || 'v0.9.2' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build fasttext-wheel ${{ inputs.version || 'v0.9.2' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    strategy:
+      fail-fast: false
+      matrix:
+        # Per-interpreter (not abi3): the pybind11 extension links the version-specific ABI.
+        python:
+          - "cp312"
+          - "cp313"
+          - "cp314"
+          - "cp314t"
+
+    steps:
+      # facebookresearch/fastText is the actual source; fasttext-wheel (messense)
+      # is only a build/publish wrapper around it that renames the distribution.
+      - name: Checkout fastText ${{ env.FASTTEXT_WHEEL_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: facebookresearch/fastText
+          ref: ${{ env.FASTTEXT_WHEEL_VERSION }}
+          persist-credentials: false
+
+      - name: Checkout python-wheels
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          path: python-wheels
+          persist-credentials: false
+
+      - name: Patch fastText source
+        run: git apply python-wheels/patches/fasttext-wheel/${{ env.FASTTEXT_WHEEL_VERSION }}/00*.patch
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          output-dir: wheelhouse/
+          only: ${{ matrix.python }}-manylinux_riscv64
+        env:
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # No pyproject.toml, so `python -m build`'s isolated venv has no pip;
+          # setup.py's get_pybind_include self-installs pybind11 via `pip install`
+          # there and fails with "No module named pip". Pre-install its
+          # install_requires (pybind11, setuptools, numpy) and skip isolation.
+          CIBW_BEFORE_BUILD: pip install pybind11 setuptools numpy
+          CIBW_BUILD_FRONTEND: "pip; args: --no-build-isolation"
+          # runtests.py (upstream's `python_test.sh` entry point) lives outside the
+          # installed package, so run the same gen_unit_tests() suite it calls
+          # directly against the installed fasttext.tests subpackage instead.
+          CIBW_TEST_COMMAND: >-
+            python -c "import unittest, sys; from fasttext.tests.test_script import gen_unit_tests; r = unittest.TextTestRunner(verbosity=2).run(unittest.TestLoader().loadTestsFromTestCase(gen_unit_tests())); sys.exit(0 if r.wasSuccessful() else 1)"
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: fasttext-wheel-${{ inputs.version || 'v0.9.2' }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish fasttext-wheel ${{ inputs.version || 'v0.9.2' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: fasttext-wheel-${{ inputs.version || 'v0.9.2' }}-*-manylinux_riscv64

patches/fasttext-wheel/v0.9.2/0001-setup-rename-distribution-to-fasttext-wheel.patch

@@ -0,0 +1,33 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Ludovic Henry <git@ludovic.dev>
+Date: Tue, 8 Sep 2026 00:00:00 +0000
+Subject: [PATCH] setup: rename distribution to fasttext-wheel
+
+Upstream-Status: Inappropriate [downstream redistribution naming, irrelevant to facebookresearch/fastText]
+
+fasttext-wheel is messense's community-maintained PyPI distribution built from
+this same source tree, published under a different project name because
+`fasttext` on PyPI is a separate, unrelated distribution. messense/fasttext-wheel's
+own manylinux.sh build script does this exact rename with a `sed` before
+building (`sed -i "s/name='fasttext',/name='fasttext-wheel',/" fastText/setup.py`).
+Reapply it here so the built wheel carries the `fasttext-wheel` project name
+while the importable `fasttext` package/module path is unchanged.
+
+Signed-off-by: Ludovic Henry <git@ludovic.dev>
+---
+ setup.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/setup.py b/setup.py
+index a1b2c3d..e4f5a6b 100644
+--- a/setup.py
++++ b/setup.py
+@@ -166,7 +166,7 @@ def _get_readme():
+
+
+ setup(
+-    name='fasttext',
++    name='fasttext-wheel',
+     version=__version__,
+     author='Onur Celebi',
+     author_email='celebio@fb.com',

patches/fasttext-wheel/v0.9.2/0002-FastText-fix-numpy-2.x-copy-False-compatibility.patch

@@ -0,0 +1,54 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Ludovic Henry <git@ludovic.dev>
+Date: Tue, 8 Sep 2026 00:00:00 +0000
+Subject: [PATCH] FastText: fix numpy 2.x `copy=False` compatibility
+
+Upstream-Status: To upstream [facebookresearch/fastText archived (read-only) 2024-03-19, blocking new PRs]
+
+`np.array(obj, copy=False)` raised on numpy 1.x only when a copy could not be
+avoided but silently allowed one otherwise; numpy 2.0 made `copy=False` a hard
+requirement and raises `ValueError: Unable to avoid copy while creating an
+array as requested` whenever a copy is actually needed, which
+`_FastText.predict`, `_Meter.scores` and `_Meter.precision_recall_curve` hit on
+every call. This reproduces off riscv64 (confirmed on macOS/arm64): all four
+`test_supervised_predict_*` unit tests fail identically on any platform once
+numpy >= 2.0 is installed, which our registry serves as the only riscv64
+build. Switching to `np.asarray`, numpy's own documented migration fix,
+preserves numpy 1.x behaviour and fixes numpy 2.x.
+
+Signed-off-by: Ludovic Henry <git@ludovic.dev>
+---
+ python/fasttext_module/fasttext/FastText.py | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/python/fasttext_module/fasttext/FastText.py b/python/fasttext_module/fasttext/FastText.py
+index 1234567..89abcde 100644
+--- a/python/fasttext_module/fasttext/FastText.py
++++ b/python/fasttext_module/fasttext/FastText.py
+@@ -43,7 +43,7 @@ class _Meter(object):
+         else:
+             y_scores, y_true = ([], ())
+
+-        return np.array(y_scores, copy=False), np.array(y_true, copy=False)
++        return np.asarray(y_scores), np.asarray(y_true)
+
+     def precision_recall_curve(self, label=None):
+         """Return precision/recall curve"""
+@@ -58,7 +58,7 @@ class _Meter(object):
+         else:
+             precision, recall = ([], ())
+
+-        return np.array(precision, copy=False), np.array(recall, copy=False)
++        return np.asarray(precision), np.asarray(recall)
+
+     def precision_at_recall(self, recall, label=None):
+         """Return precision for a given recall"""
+@@ -229,7 +229,7 @@ class _FastText(object):
+             else:
+                 probs, labels = ([], ())
+
+-            return labels, np.array(probs, copy=False)
++            return labels, np.asarray(probs)
+
+     def get_input_matrix(self):
+         """

patches/fasttext-wheel/v0.9.2/0003-args-fix-missing-cstdint-include-for-uint64_t.patch

@@ -0,0 +1,45 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Ludovic Henry <git@ludovic.dev>
+Date: Tue, 8 Sep 2026 00:00:00 +0000
+Subject: [PATCH] args: fix missing <cstdint> include for uint64_t
+
+Upstream-Status: Backport [https://github.com/facebookresearch/fastText/commit/6c2204ba66776b700095ff73e3e599a908ffd9c3]
+
+args.cc uses `uint64_t` in `getAutotuneModelSize()` without including
+`<cstdint>`, relying on it being pulled in transitively by another header.
+This happens to hold on the x86_64/aarch64 manylinux images' GCC/libstdc++,
+but fails on manylinux_riscv64's (newer, stricter) toolchain with:
+
+    src/args.cc:468:3: error: 'uint64_t' was not declared in this scope
+    src/args.cc:17:1: note: 'uint64_t' is defined in header '<cstdint>';
+    this is probably fixable by adding '#include <cstdint>'
+
+Upstream hit the same failure under GCC 13 (whose header-dependency
+changes stopped transitively exposing <cstdint>, see
+https://gcc.gnu.org/gcc-13/porting_to.html#header-dep-changes) and fixed it
+in commit 6c2204ba66776b700095ff73e3e599a908ffd9c3 ("fix compile error with
+gcc13 #1281 (#1340)", 2023-11-27) by adding the same include, before the
+repo was archived (2024-03-19). Backport that one-line fix onto v0.9.2,
+whose args.cc still includes `<stdlib.h>` rather than the `<cstdlib>` that
+commit's context lines show (an unrelated later modernization), so the
+insertion point here is next to the `<stdlib.h>` include instead.
+
+Signed-off-by: Ludovic Henry <git@ludovic.dev>
+---
+ src/args.cc | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/args.cc b/src/args.cc
+index 7ac8c2f..b47bd24 100644
+--- a/src/args.cc
++++ b/src/args.cc
+@@ -9,6 +9,7 @@
+ #include "args.h"
+
+ #include <stdlib.h>
++#include <cstdint>
+
+ #include <iostream>
+ #include <stdexcept>
+--
+2.50.1 (Apple Git-155)