build: use docker to build linux-x64 glibc

.github/workflows/build.yml

@@ -51,17 +51,23 @@ jobs:
           submodules: recursive
 
       - name: Build for others step-1
-        if: ${{ matrix.libc != 'musl' }}
+        if: ${{ matrix.platform != 'linux-x64' }}
         uses: actboy168/setup-luamake@master
 
       - name: Build for others step-2
-        if: ${{ matrix.libc != 'musl' }}
+        if: ${{ matrix.platform != 'linux-x64' }}
         run: luamake -platform ${{ matrix.platform }}
 
       - name: Build for musl
-        if: ${{ matrix.target == 'linux' && matrix.libc == 'musl' }}
+        if: ${{ matrix.platform == 'linux-x64' && matrix.libc == 'musl' }}
         run: ./make.sh
 
+      - name: Build for x64 glibc
+        if: ${{ matrix.platform == 'linux-x64' && matrix.libc != 'musl' }}
+        run: |
+          docker build -t ubuntu-18.04 .
+          docker run --rm -v $(pwd):$(pwd) -w $(pwd) ubuntu-18.04 bash -c './make.sh'
+
       - name: Setting up workflow variables
         id: vars
         shell: bash

Dockerfile

@@ -0,0 +1,14 @@
+# Dockerfile
+
+FROM ubuntu:18.04
+
+# Install necessary packages
+RUN apt-get update && \
+    apt-get install -y software-properties-common && \
+    add-apt-repository -y ppa:ubuntu-toolchain-r/test && \
+    add-apt-repository -y ppa:git-core/ppa && \
+    apt-get install -y git gcc-9 g++-9 wget tar gzip rsync ninja-build
+
+# Use alternative gcc
+RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 100 && \
+    update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-9 100