github-actions: replace autotools by cmake

.github/workflows/autotools.yml

@@ -1,19 +0,0 @@
-name: C with autotools
-
-on: [push, pull_request]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v1
-    - name: autogen
-      run: ./autogen.sh
-    - name: configure
-      run: ./configure
-    - name: make
-      run: make
-    - name: make distcheck
-      run: make distcheck

.github/workflows/compile.yml

@@ -0,0 +1,59 @@
+name: native and cross
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-24.04
+    strategy:
+      fail-fast: false
+      matrix:
+        release:
+        - "ubuntu:20.04"
+        - "ubuntu:22.04"
+        - "ubuntu:24.04"
+        - "ubuntu:rolling"
+        - "debian:oldstable-slim"
+        - "debian:stable-slim"
+        - "debian:testing-slim"
+        - "debian:unstable-slim"
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Prepare ${{ matrix.release }} container
+      run: |
+        podman version
+        podman run --name stable -di --userns=keep-id:uid=1000,gid=1000 -v "$PWD":/home -w /home ${{ matrix.release }} bash
+        podman exec -i stable uname -a
+        podman exec -i stable id
+        podman exec -i -u root stable apt update
+        podman exec -e DEBIAN_FRONTEND='noninteractive' -i -u root stable apt install -o APT::Install-Suggests=false -qy \
+                clang \
+                cmake \
+                gcc \
+                make
+
+    - name: Configure & Build with gcc
+      env:
+        cc: gcc
+      run: |
+        podman exec -i stable cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_C_COMPILER=${cc} -DENABLE_WERROR=ON -B build-${cc}
+        podman exec -i stable cmake --build build-${cc}
+
+    - name: Configure & Build with clang
+      env:
+        cc: clang
+      run: |
+        podman exec -i stable cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_C_COMPILER=${cc} -DENABLE_WERROR=ON -B build-${cc}
+        podman exec -i stable cmake --build build-${cc}
+
+    - name: Show logs
+      if: ${{ failure() }}
+      run: |
+        for log in build-*/CMakeFiles/{CMakeOutput.log,CMakeConfigureLog.yaml}; do \
+                if [ -e ${log} ]; then \
+                        echo "---------------- ${log} ----------------"; \
+                        cat ${log}; \
+                fi; \
+        done

CMakeLists.txt

@@ -12,6 +12,13 @@ if(NOT CMAKE_BUILD_TYPE)
   set(CMAKE_BUILD_TYPE Release)
 endif()
 
+# Add an option to enable treating warnings as errors
+option(ENABLE_WERROR "Treat all compiler warnings as errors" OFF)
+
+if(ENABLE_WERROR)
+  add_compile_options(-Werror)
+endif()
+
 add_definitions(-D_GNU_SOURCE)
 
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wno-parentheses")