WIP: Add Linux to CI.

.github/workflows/linux.yml

@@ -0,0 +1,67 @@
+name: Linux
+
+on:
+  push:
+    branches: [ "1.7.x", "1.6.x" ]
+    tags: [ "*" ]
+  pull_request:
+    branches: [ "1.7.x", "1.6.x" ]
+
+env:
+  MARGS: "-j2"
+
+jobs:
+
+  build:
+    strategy:
+      matrix:
+        include: 
+          - name: APR 1.7.x
+            apr-version: 1.7.x
+            config-output: APU_HAVE_SDBM
+          - name: APR 1.6.x
+            apr-version: 1.6.x
+            config-output: APU_HAVE_SDBM
+          - name: APR 1.7.x maintainer-mode
+            apr-version: 1.7.x
+            apr-config: --enable-maintainer-mode
+            config-output: APU_HAVE_SDBM
+            notest-cflags: -Werror
+      fail-fast: false
+
+    runs-on: ubuntu-latest
+    env:
+      NOTEST_CFLAGS: ${{ matrix.notest-cflags }}
+    name: ${{ matrix.name }}
+    steps:
+    - name: Install prerequisites
+      run: sudo apt-get install libtool libtool-bin ${{ matrix.packages }}
+    - name: Workaround ASAN issue in Ubuntu 22.04 runners
+      run: sudo sysctl vm.mmap_rnd_bits=28
+    - uses: actions/checkout@v4
+    # https://github.com/actions/runner-images/issues/9491#issuecomment-1989718917
+    - uses: actions/checkout@v4
+      with:
+        repository: apache/apr
+        ref: ${{ matrix.apr-version }}
+        path: apr
+    - name: Configure and build APR ${{ matrix.apr-version }}
+      working-directory: ./apr
+      run: |
+        ./buildconf
+        ./configure ${{ matrix.apr-config }} --prefix=/tmp/apr-root
+        make $MARGS
+        make install
+    - name: buildconf
+      run: ./buildconf --with-apr=./apr
+    - name: configure
+      run: ./configure --prefix=/tmp/apr-util --with-apr=/tmp/apr-root ${{ matrix.config }}
+    - if: ${{ matrix.config-output != '' }}
+      name: check for expected configure output ${{ matrix.config-output }}
+      run: for var in ${{ matrix.config-output }}; do grep "^#define *${var} *1" include/apu.h; done
+    - name: make
+      run: make $MARGS
+    - name: install
+      run: make install
+    - name: check
+      run: make check