MISC: Add zlib

depends/depends.txt

 curl    sqlite3     https://www.sqlite.org/src/tarball/sqlite.tar.gz?r=release  sqlite3.tar.gz
 wget    sdl2        https://www.libsdl.org/release/SDL2-2.0.12.tar.gz           sdl2.tar.gz
 wget    libcurl     https://curl.haxx.se/download/curl-7.72.0.tar.gz            libcurl.tar.gz
+wget    zlib        https://zlib.net/zlib-1.2.11.tar.gz                         zlib.tar.gz

depends/rules.txt

 sqlite3     configure   --disable-shared --disable-tcl
 sdl2        configure   --disable-shared --enable-fcitx
 libcurl     configure   --disable-shared
+zlib        zconfigure  --static --64

scripts/depends.bash

@@ -125,16 +125,30 @@ do
         continue
     fi
 
+    # Go to right folder
     cd $BUILD_DIR/depends/$FOLD
 
+    # Types of builds
+    case "$TYPE" in
+        configure)
             $ROOT_DIR/depends/$FOLD/configure --prefix=$ABS_BUILD_DIR/depends_install CC=$CC CXX=$CXX $OPT
             [ $? -ne 0 ] && die "Failed to configure $FOLD"
+            ;;
+        zconfigure)
+            # The CC= and CXX= doesn't work for zlib
+            $ROOT_DIR/depends/$FOLD/configure --prefix=$ABS_BUILD_DIR/depends_install $OPT
+            [ $? -ne 0 ] && die "Failed to configure $FOLD"
+            ;;
+    esac
+
     make -j$NPROC
     [ $? -ne 0 ] && die "Failed to make $FOLD, build folder is $BUILD_DIR/depends/$FOLD"
     make install
-    [ $? -ne 0 ] && die "Failed to install $FOLD, build folder is $BUILD_DIR/depends/$FOLD" \
-                        ", install folder is $ROOT_DIR/depends_install"
+    [ $? -ne 0 ] && die "Failed to install $FOLD, build folder is " \
+                        "$BUILD_DIR/depends/$FOLD, install folder " \
+                        "is $ROOT_DIR/depends_install"
 
+    # Exit folder and mark it as compiled
     touch .lektor
     cd $ROOT_DIR
     echo "Finished to build $FOLD, result is in $BUILD_DIR/depends/$FOLD"