Fix github actions build error

.github/workflows/cmake.yml

@@ -23,41 +23,42 @@ jobs:
     # cross-platform coverage.
     # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
     runs-on: ubuntu-latest
+    container: ubuntu:latest
 
     steps:
     - uses: actions/checkout@v2
       
     - name: Install dependencies
-      run: sudo apt install libglu1-mesa-dev pkg-config
+      run: apt update && DEBIAN_FRONTEND=noninteractive apt install -y cmake gcc g++ libglu1-mesa-dev pkg-config libx11-dev libxext-dev
 
     - name: Create Build Environment
       # Some projects don't allow in-source building, so create a separate build directory
       # We'll use this as our working directory for all subsequent commands
       run: |
-        mkdir ${{runner.workspace}}/build_test
+        mkdir build_test
-        mkdir ${{runner.workspace}}/from_installed
+        mkdir from_installed
-        mkdir ${{runner.workspace}}/pkg-config
+        mkdir pkg-config
-        mkdir ${{runner.workspace}}/as_subdirectory
+        mkdir as_subdirectory
 
     - name: Configure CMake
       # Use a bash shell so we can use the same syntax for environment variable
       # access regardless of the host operating system
       shell: bash
-      working-directory: ${{runner.workspace}}/build_test
+      working-directory: build_test
       # Note the current convention is to use the -S and -B options here to specify source 
       # and build directories, but this is only available with CMake 3.13 and higher.  
       # The CMake binaries on the Github Actions machines are (as of this writing) 3.12
       run: cmake $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=$BUILD_TYPE
 
     - name: Build test
-      working-directory: ${{runner.workspace}}/build_test
+      working-directory: build_test
       shell: bash
       # Execute the build.  You can specify a specific target with "--target <NAME>"
       run: cmake --build . --config $BUILD_TYPE
 
     - name: Install test
       shell: bash
-      working-directory: ${{runner.workspace}}/from_installed
+      working-directory: from_installed
       run: |
         mkdir -p ext_project/build
         cp $GITHUB_WORKSPACE/src/glewinfo.c ext_project/
@@ -71,7 +72,7 @@ jobs:
 
     - name: Package config test
       shell: bash
-      working-directory: ${{runner.workspace}}/pkg-config
+      working-directory: pkg-config
       run: |
         mkdir -p ext_project
         cp $GITHUB_WORKSPACE/src/glewinfo.c ext_project/
@@ -83,7 +84,7 @@ jobs:
 
     - name: Subdirectory test
       shell: bash
-      working-directory: ${{runner.workspace}}/as_subdirectory
+      working-directory: as_subdirectory
       run: |
         cp $GITHUB_WORKSPACE/src/glewinfo.c ./
         cp $GITHUB_WORKSPACE/glew-cmake/sub-directory-test.cmake CMakeLists.txt