Added Alpine build to GitHub Actions CI workflow.

.github/workflows/ci.yml

@@ -29,6 +29,7 @@ jobs:
           - {name: 'ubuntu-22.04 gcc-12', os: ubuntu-22.04, cc: 'gcc-12', cxx: 'g++-12', tag: '12'}
           - {name: 'ubuntu-24.04 gcc-13', os: ubuntu-24.04, cc: 'gcc-13', cxx: 'g++-13', tag: '13'}
           - {name: 'ubuntu-24.04 gcc-14', os: ubuntu-24.04, cc: 'gcc-14', cxx: 'g++-14', tag: '14'}
+          - {name: 'alpine-3.17 gcc-12', os: ubuntu-latest, container: 'alpine:3.17', cc: 'gcc', cxx: 'g++', tag: '12'}
 
     env:
       CC: ${{ matrix.config.cc }}
@@ -48,6 +49,9 @@ jobs:
                  sudo apt-add-repository ppa:git-core/ppa
                  sudo apt-get -o Acquire::Retries=3 update && apt-get -o Acquire::Retries=3 -y install git
                  ;;
+              alpine*)
+                 apk add --no-cache make gcc g++ autoconf automake m4 bash git libtool file git py3-sphinx util-linux-dev libuuid libevent-dev gperf boost-dev openssl-dev
+                 ;;
               *)
                  ;;
            esac
@@ -70,7 +74,24 @@ jobs:
                  ip addr
                  echo "==="
                  echo "'hostname -i' shows '$(hostname -i)'"
-                 echo "'hostname -I' shows '$(hostname -I)'"
+                 echo "'hostname -s' shows '$(hostname -s)'"
+                 echo "'hostname -f' shows '$(hostname -f)'"
+                 ;;
+              alpine*)
+                 echo "==="
+                 echo "Before: /etc/hosts"
+                 cat /etc/hosts
+                 echo "==="
+                 echo "Removing localhost name from ::1 entry in /etc/hosts..."
+                 sed 's/^::1\s\s*localhost\s\(.*\)/::1 \1/' /etc/hosts > /tmp/hosts.temp
+                 cp /tmp/hosts.temp /etc/hosts
+                 rm /tmp/hosts.temp
+                 echo "After: /etc/hosts"
+                 cat /etc/hosts
+                 echo "==="
+                 ip addr
+                 echo "==="
+                 echo "'hostname -i' shows '$(hostname -i)'"
                  echo "'hostname -s' shows '$(hostname -s)'"
                  echo "'hostname -f' shows '$(hostname -f)'"
                  ;;