Merged modified linux build into main build script

.github/workflows/build.yml

@@ -9,26 +9,48 @@ jobs:
     runs-on: ubuntu-latest
     container: centos:7
     steps:
-      - uses: actions/checkout@v2
       - name: Install dependenicies
         run: |
-          yum -y install file gcc gcc-c++ make zlib-devel
-      - name: Build
+          yum -y install file gcc gcc-c++ make unzip
+      - name: Install CMake
+        uses: lukka/get-cmake@latest
+
+      - name: Checkout zlib
+        uses: actions/checkout@v2
+        with:
+          repository: madler/zlib
+          path: zlib
+
+      - name: Build zlib
         run: |
-          make
-          strip out-shared/libleveldb.so.1.20
-          file out-shared/libleveldb.so.1.20
-          ldd out-shared/libleveldb.so.1.20
+          cd zlib
+          cmake -GNinja -DCMAKE_POSITION_INDEPENDENT_CODE=ON
+          cmake --build . --config Release
+          cd ..
+        
+      - name: Checkout leveldb
+        uses: actions/checkout@v2
+        with:
+          path: leveldb-mcpe
+
+      - name: Build leveldb
+        run: |
+          cmake -DZLIB_INCLUDE_DIR="zlib" -DZLIB_LIBRARY="/__w/leveldb-mcpe/leveldb-mcpe/zlib/libz.a" -GNinja leveldb-mcpe
+          cmake --build . --config Release
+          strip libleveldb.so
+          file libleveldb.so
+          ldd libleveldb.so
       - name: Upload Release Asset
         id: upload-release-asset
         uses: actions/upload-release-asset@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           upload_url: ${{ github.event.release.upload_url }}
-          asset_path: out-shared/libleveldb.so
+          asset_path: libleveldb.so
           asset_name: libleveldb.so
           asset_content_type: so
+
   macos:
     runs-on: macos-10.15
     steps: