From 97598b90ae8f48b4db1180d08da10ddc5e7b1e63 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 7 May 2026 17:04:46 +0000
Subject: [PATCH 1/2] Add GitHub Actions CI workflow with 8-build matrix

Agent-Logs-Url: https://github.com/eisenwave/integer-division/sessions/1d3e0cf9-5ffe-42b7-b295-e7cc865128ee

Co-authored-by: eisenwave <22040976+eisenwave@users.noreply.github.com>
---
 .github/workflows/ci.yml | 95 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 .github/workflows/ci.yml

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..0b10dd9
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,95 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    name: ${{ matrix.compiler }} ${{ matrix.build_type }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            compiler: GCC
+            build_type: Debug
+            cmake_c_compiler: gcc
+            cmake_cxx_compiler: g++
+
+          - os: ubuntu-latest
+            compiler: GCC
+            build_type: Release
+            cmake_c_compiler: gcc
+            cmake_cxx_compiler: g++
+
+          - os: ubuntu-latest
+            compiler: Clang
+            build_type: Debug
+            cmake_c_compiler: clang
+            cmake_cxx_compiler: clang++
+
+          - os: ubuntu-latest
+            compiler: Clang
+            build_type: Release
+            cmake_c_compiler: clang
+            cmake_cxx_compiler: clang++
+
+          - os: ubuntu-latest
+            compiler: Clang libc++
+            build_type: Debug
+            cmake_c_compiler: clang
+            cmake_cxx_compiler: clang++
+            cxxflags: -stdlib=libc++
+            ldflags: -stdlib=libc++
+            install_libcxx: true
+
+          - os: ubuntu-latest
+            compiler: Clang libc++
+            build_type: Release
+            cmake_c_compiler: clang
+            cmake_cxx_compiler: clang++
+            cxxflags: -stdlib=libc++
+            ldflags: -stdlib=libc++
+            install_libcxx: true
+
+          - os: windows-latest
+            compiler: MSVC
+            build_type: Debug
+
+          - os: windows-latest
+            compiler: MSVC
+            build_type: Release
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install libc++
+        if: matrix.install_libcxx
+        run: sudo apt-get install -y libc++-dev libc++abi-dev
+
+      - name: Configure (Unix)
+        if: runner.os != 'Windows'
+        run: |
+          cmake -S . -B build \
+            -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
+            -DCMAKE_C_COMPILER=${{ matrix.cmake_c_compiler }} \
+            -DCMAKE_CXX_COMPILER=${{ matrix.cmake_cxx_compiler }} \
+            -DCMAKE_CXX_FLAGS="${{ matrix.cxxflags }}" \
+            -DCMAKE_EXE_LINKER_FLAGS="${{ matrix.ldflags }}"
+
+      - name: Configure (Windows)
+        if: runner.os == 'Windows'
+        run: cmake -S . -B build
+
+      - name: Build
+        run: cmake --build build --config ${{ matrix.build_type }}
+
+      - name: Test (Unix)
+        if: runner.os != 'Windows'
+        run: ./build/test
+
+      - name: Test (Windows)
+        if: runner.os == 'Windows'
+        run: .\build\${{ matrix.build_type }}\test.exe

From 37cc83c8a7bfb8c65c1d9e38c4503029ecb5ee1b Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 7 May 2026 17:05:22 +0000
Subject: [PATCH 2/2] Address code review feedback: rename Clang libc++ and add
 comment

Agent-Logs-Url: https://github.com/eisenwave/integer-division/sessions/1d3e0cf9-5ffe-42b7-b295-e7cc865128ee

Co-authored-by: eisenwave <22040976+eisenwave@users.noreply.github.com>
---
 .github/workflows/ci.yml | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0b10dd9..e8bd5c0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,7 +37,7 @@ jobs:
             cmake_cxx_compiler: clang++
 
           - os: ubuntu-latest
-            compiler: Clang libc++
+            compiler: Clang-libcxx
             build_type: Debug
             cmake_c_compiler: clang
             cmake_cxx_compiler: clang++
@@ -46,7 +46,7 @@ jobs:
             install_libcxx: true
 
           - os: ubuntu-latest
-            compiler: Clang libc++
+            compiler: Clang-libcxx
             build_type: Release
             cmake_c_compiler: clang
             cmake_cxx_compiler: clang++
@@ -80,6 +80,7 @@ jobs:
             -DCMAKE_EXE_LINKER_FLAGS="${{ matrix.ldflags }}"
 
       - name: Configure (Windows)
+        # Visual Studio is a multi-config generator; build type is passed via --config at build time
         if: runner.os == 'Windows'
         run: cmake -S . -B build