Make: Drop RISC-V wheels until Clang 23

Author: ashvardanian

.github/workflows/_wheels.yml

@@ -228,6 +228,9 @@ jobs:
 
   build_wheels_linux_riscv:
     name: Build Python Wheels (Linux RISC-V)
+    # Temporarily disabled until the official PyPA riscv64 images expose a
+    # packaged LLVM 23 toolchain, or until we switch to custom images.
+    if: ${{ false }}
     runs-on: ubuntu-24.04
     strategy:
       matrix:

.github/workflows/test-c.yml

@@ -91,3 +91,31 @@ jobs:
 
       - name: Build via Cargo
         run: cargo ndk -t arm64-v8a build --release
+
+  test_riscv_llvm23:
+    name: Test RISC-V LLVM 23
+    runs-on: ubuntu-24.04
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y cmake clang-23 lld-23 llvm-23 qemu-user gcc-riscv64-linux-gnu libc6-dev-riscv64-cross
+
+      - name: Configure portable RISC-V build
+        shell: bash
+        run: |
+          set -euo pipefail
+          SYSROOT="$(riscv64-linux-gnu-gcc -print-sysroot)"
+          cmake -B build_riscv \
+            -DCMAKE_TOOLCHAIN_FILE=cmake/toolchain-riscv64-llvm.cmake \
+            -DLLVM_ROOT=/usr/lib/llvm-23 \
+            -DRISCV_SYSROOT="${SYSROOT}" \
+            -DRISCV_MARCH=rv64gcv \
+            -DNK_BUILD_TEST=ON
+
+      - name: Build portable RISC-V targets
+        run: cmake --build build_riscv --parallel

pyproject.toml

@@ -1,6 +1,6 @@
 # This file configures wheels compilation for `cibuilwheel` for NumKong CPython bindings.
 # On a good day it will produce:
-#   - `manylinux` and `musllinux` vectorized wheels for Linux on x86_64, aarch64, riscv64;
+#   - `manylinux` and `musllinux` vectorized wheels for Linux on x86_64, aarch64;
 #   - `manylinux` and `musllinux` wheels for Linux on i686, ppc64le, s390x;
 #   - `macos` wheels for x86_64, arm64;
 #   - `windows` wheels for AMD64, ARM64.
@@ -77,11 +77,16 @@ repair-wheel-command = "auditwheel repair -w {dest_dir} {wheel}"
 # - for `manylinux`: https://quay.io/search?q=manylinux
 # - for `musllinux`: https://quay.io/search?q=musllinux
 manylinux-aarch64-image = "manylinux_2_28"
-manylinux-riscv64-image = "manylinux_2_39"
 manylinux-x86_64-image = "manylinux_2_28"
 musllinux-aarch64-image = "musllinux_1_2"
-musllinux-riscv64-image = "musllinux_1_2"
 musllinux-x86_64-image = "musllinux_1_2"
+# RISC-V wheel uploads are temporarily disabled.
+# The official PyPA riscv64 images currently provide LLVM 20 packages, while the
+# portable `rv64gcv` baseline plus richer RISC-V kernels now requires Clang 23.
+# Keep the image names here as comments until we have either custom images or a
+# packaged LLVM 23 path for both manylinux and musllinux.
+# manylinux-riscv64-image = "manylinux_2_39"
+# musllinux-riscv64-image = "musllinux_1_2"
 
 # On CentOS we have to use `yum`.
 # The healthy version would be: `apt-get update && apt-get install -y libc6-dev wget python3-dev`.
@@ -172,34 +177,32 @@ environment.NK_TARGET_X86_ = "0"
 inherit.environment = "append"
 select = "*-macos*_arm64"
 
-# RISC-V 64-bit builds
-# The `manylinux_2_39` riscv64 image uses `dnf` instead of `yum`.
-# GCC/binutils in this image don't support all requested RISC-V vector extensions.
-# Install LLVM and build with clang + lld for full `rv64gcv_zvfh_zvfbfwma_zvbb`.
-[[tool.cibuildwheel.overrides]]
-before-all = "dnf update -y && dnf install -y glibc-devel wget python3-devel clang lld"
-environment.CC = "clang"
-environment.CXX = "clang++"
-environment.LDFLAGS = "-fuse-ld=lld"
-environment.NK_TARGET_ARM_ = "0"
-environment.NK_TARGET_RISCV_ = "1"
-environment.NK_TARGET_X86_ = "0"
-inherit.environment = "append"
-select = "*-manylinux*_riscv64"
-
-# The default `musllinux_1_2` riscv64 image ships GCC which doesn't support
-# all requested RISC-V vector extensions (zvfbfwma, zvbb).
-# Install LLVM and build with clang + lld, mirroring the manylinux override.
-[[tool.cibuildwheel.overrides]]
-before-all = "apk add --update wget python3-dev clang lld"
-environment.CC = "clang"
-environment.CXX = "clang++"
-environment.LDFLAGS = "-fuse-ld=lld"
-environment.NK_TARGET_ARM_ = "0"
-environment.NK_TARGET_RISCV_ = "1"
-environment.NK_TARGET_X86_ = "0"
-inherit.environment = "append"
-select = "*-musllinux*_riscv64"
+# RISC-V 64-bit wheels are temporarily disabled.
+# Keep the old overrides commented out as a breadcrumb for re-enabling the
+# release path once an official LLVM 23 package source is available inside the
+# PyPA riscv64 images, or once we switch to custom images with LLVM 23 baked in.
+#
+# [[tool.cibuildwheel.overrides]]
+# before-all = "dnf update -y && dnf install -y glibc-devel wget python3-devel clang lld"
+# environment.CC = "clang"
+# environment.CXX = "clang++"
+# environment.LDFLAGS = "-fuse-ld=lld"
+# environment.NK_TARGET_ARM_ = "0"
+# environment.NK_TARGET_RISCV_ = "1"
+# environment.NK_TARGET_X86_ = "0"
+# inherit.environment = "append"
+# select = "*-manylinux*_riscv64"
+#
+# [[tool.cibuildwheel.overrides]]
+# before-all = "apk add --update wget python3-dev clang lld"
+# environment.CC = "clang"
+# environment.CXX = "clang++"
+# environment.LDFLAGS = "-fuse-ld=lld"
+# environment.NK_TARGET_ARM_ = "0"
+# environment.NK_TARGET_RISCV_ = "1"
+# environment.NK_TARGET_X86_ = "0"
+# inherit.environment = "append"
+# select = "*-musllinux*_riscv64"
 
 # Pyodide / Emscripten WASM builds
 # The Pyodide venv creates Python-script entry points (like `pytest`) that can't