From 7b329c77b52be5cbec3aba4e32037d927882c7ef Mon Sep 17 00:00:00 2001
From: Bruno Verachten <gounthar@gmail.com>
Date: Fri, 20 Mar 2026 13:52:16 +0100
Subject: [PATCH] ci: add riscv64 native build workflow

Add a non-blocking CI job that builds Mosquitto on native riscv64 hardware
using RISE Project runners (ubuntu-24.04-riscv).

Build validated: Mosquitto 2.1.2 compiles in ~1m38s with all binaries
(mosquitto, mosquitto_pub, mosquitto_sub) working correctly.

Closes #3545

Signed-off-by: Bruno Verachten <gounthar@gmail.com>
---
 .github/workflows/alt-arch-riscv64.yml | 45 ++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 .github/workflows/alt-arch-riscv64.yml

diff --git a/.github/workflows/alt-arch-riscv64.yml b/.github/workflows/alt-arch-riscv64.yml
new file mode 100644
index 0000000000..f74e4ea41e
--- /dev/null
+++ b/.github/workflows/alt-arch-riscv64.yml
@@ -0,0 +1,45 @@
+name: Alt Arch Riscv64
+
+on:
+  push:
+    branches:
+      - develop
+      - master
+  pull_request:
+    branches:
+      - develop
+      - master
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build Mosquitto (riscv64)
+    runs-on: ubuntu-24.04-riscv
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y build-essential cmake libssl-dev libcjson-dev \
+            libsqlite3-dev libargon2-dev libreadline-dev docbook-xsl xsltproc \
+            pkg-config
+
+      - name: Configure
+        run: |
+          mkdir build
+          cd build
+          cmake .. -DCMAKE_BUILD_TYPE=Release -DWITH_TESTS=OFF
+
+      - name: Build
+        run: |
+          cd build
+          time make -j$(nproc)
+
+      - name: Verify
+        run: |
+          ./build/src/mosquitto --version
+          ./build/client/mosquitto_pub --help 2>&1 | head -3
+          ./build/client/mosquitto_sub --help 2>&1 | head -3
+          file ./build/src/mosquitto