Add cpu-only build

Author: bandoti

.github/workflows/build-linux-cross.yml

@@ -4,6 +4,41 @@ on:
   workflow_call:
 
 jobs:
+  ubuntu-latest-riscv64-cpu-cross:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Riscv
+        run: |
+          sudo dpkg --add-architecture riscv64
+          sudo sed -i 's|http://azure.archive.ubuntu.com/ubuntu|http://ports.ubuntu.com/ubuntu-ports|g' \
+                 /etc/apt/sources.list /etc/apt/apt-mirrors.txt
+          sudo apt-get clean
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+                  build-essential \
+                  crossbuild-essential-riscv64
+
+      - name: Build
+        run: |
+          cmake -B build -DCMAKE_BUILD_TYPE=Release \
+                         -DGGML_OPENMP=OFF \
+                         -DLLAMA_BUILD_EXAMPLES=ON \
+                         -DLLAMA_BUILD_TESTS=OFF \
+                         -DCMAKE_SYSTEM_NAME=Linux \
+                         -DCMAKE_SYSTEM_PROCESSOR=riscv64 \
+                         -DCMAKE_C_COMPILER=riscv64-linux-gnu-gcc \
+                         -DCMAKE_CXX_COMPILER=riscv64-linux-gnu-g++ \
+                         -DCMAKE_C_FLAGS_INIT='-fPIC' \
+                         -DCMAKE_CXX_FLAGS_INIT='-fPIC' \
+                         -DCMAKE_FIND_ROOT_PATH=/usr/lib/riscv64-linux-gnu \
+                         -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER \
+                         -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY \
+                         -DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=BOTH
+
+          cmake --build build --config Release -j $(nproc)
+
   ubuntu-latest-riscv64-vulkan-cross:
     runs-on: ubuntu-latest