Add github action for cpp build and test

.github/workflows/ci.yml

@@ -1,9 +1,9 @@
 name: libintx CI
 
-on: [push]
-
-env:
-  CMAKE_BUILD_PARALLEL_LEVEL : 4
+on:
+  pull_request:
+  push:
+    branches: [main]
 
 defaults:
   run:
@@ -16,31 +16,74 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os : [ macos-15 ]
-        cxx : [ clang++ ]
-        build_type : [ Debug ]
+        os :
+          - ubuntu-latest
+          - ubuntu-24.04-arm
+
+        compiler :
+          - clang
+          - gcc
 
-    name: "${{ matrix.os }}: ${{ matrix.cxx }} ${{ matrix.build_type }}"
+        build_type : 
+          # - Debug
+          - Release
+
+        simd:
+          - ON
+          - OFF
+
+    name: "${{ matrix.os }}: ${{ matrix.compiler }} ${{ matrix.build_type }} ${{matrix.simd == 'ON' && '(simd)' || ''}}"
     runs-on: ${{ matrix.os }}
-    env:
-      CXX : ${{ matrix.cxx }}
-      CMAKE_CONFIG : >
-        -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
-        -DLIBINTX_MAX_L=2
-        -DLIBINTX_SIMD=OFF
 
     steps:
-    - uses: actions/checkout@v3
+    - name: Run sccache-cache
+      uses: mozilla-actions/sccache-action@v0.0.9
+
+    - uses: actions/checkout@v4
+
+    - name: Set compiler and sccache environment
+      run: |
+        echo "SCCACHE_GHA_ENABLED=true" >> $GITHUB_ENV
+
+        if [[ "${{ matrix.compiler }}" == "gcc" ]]; then
+          echo "CC=gcc" >> $GITHUB_ENV
+          echo "CXX=g++" >> $GITHUB_ENV
+        elif [[ "${{ matrix.compiler }}" == "clang" ]]; then
+          echo "CC=clang" >> $GITHUB_ENV
+          echo "CXX=clang++" >> $GITHUB_ENV
+        else
+          echo "Unsupported compiler: ${{ matrix.compiler }}"
+          exit 1
+        fi
 
-    - name: "Configure: ${{ env.CMAKE_CONFIG }}"
+    - name: Verify compiler
       run: |
         set -x;
-        cmake -B${{github.workspace}}/build $CMAKE_CONFIG
+        $CC --version
+        $CXX --version 
+
+    - name: Install Build Dependencies
+      run: |
+        set -x;
+        sudo apt-get update && sudo apt-get install -y \
+          libopenblas-dev \
+          liblapacke-dev
+
+    - name: Configure
+      run: |
+        set -x;
+        cmake -S . -B ./build -G "Ninja Multi-Config" \
+          -DLIBINTX_MAX_L=2 \
+          -DLIBINTX_SIMD=${{matrix.simd}} \
+          -DCMAKE_CXX_COMPILER_LAUNCHER=sccache \
+          -DCMAKE_C_COMPILER_LAUNCHER=sccache \
+          -DCMAKE_BUILD_TYPE:STRING=${{matrix.build_type}}
+
 
     - name: Build
       working-directory: ${{github.workspace}}/build
       run: |
-        cmake --build . --target all all.tests
+        cmake --build . --target all all.tests --config ${{matrix.build_type}}
 
     - name: Test
       working-directory: ${{github.workspace}}/build

CMakeLists.txt

@@ -62,6 +62,19 @@ if (TARGET LAPACK::LAPACK)
   unset(_lib)
 endif()
 
+find_package(LAPACKE QUIET)
+if (NOT TARGET LAPACKE::LAPACKE)
+  find_package(PkgConfig REQUIRED)
+  pkg_check_modules(LAPACKE_PC lapacke)
+  if (LAPACKE_PC_FOUND)
+    message(STATUS "Found LAPACKE via pkg-config")
+    set(LAPACKE_INCLUDE_DIRS ${LAPACKE_PC_INCLUDE_DIRS})
+    set(LAPACKE_LIBRARIES ${LAPACKE_PC_LIBRARIES})
+  else()
+    message(FATAL_ERROR "LAPACKE not found via find_package or pkg-config")
+  endif()
+endif()
+
 set(LIBINTX_CBLAS_H "" CACHE STRING "")
 set(LIBINTX_LAPACKE_H "" CACHE STRING "")
 mark_as_advanced(LIBINTX_CBLAS_H LIBINTX_LAPACKE_H)

src/libintx/CMakeLists.txt

@@ -18,7 +18,7 @@ if (LIBINTX_APPLE_ACCELERATE)
 endif()
 
 if (TARGET LAPACK::LAPACK)
-  target_link_libraries(libintx.blas LAPACK::LAPACK)
+  target_link_libraries(libintx.blas LAPACK::LAPACK ${LAPACKE_LIBRARIES})
 endif()
 
 install(