1. Create directory for program sources:

   mkdir sources
   cd sources

2. Download linuxdeploy program sources: git clone https://github.com/linuxdeploy/linuxdeploy.git
3. Go into linuxdeploy/libs subdirectory:

   cd linuxdeploy/libs

4. Download linuxdeploy-plugin-appimage plugin sources:

   git clone https://github.com/linuxdeploy/linuxdeploy-plugin-appimage.git

5. Go to main drectory of linuxdeploy program (sources/linuxdeploy) and issue following command to download remaining plugins:

   cd ..
   git submodule update --init --recursive

6. Make generate-excludelist.sh script executable:

   chmod 755 src/core/generate-excludelist.sh

7. Edit CMakeLists file and replace following line:

   set(USE_SYSTEM_CIMG ON CACHE BOOL "Set to OFF to use CImg library bundled in lib directory")

   with line:

   set(USE_SYSTEM_CIMG OFF CACHE BOOL "Set to OFF to use CImg library bundled in lib directory")

8. Create build subdirectory for the output binaries, cd into it and call build command:

   mkdir build
   cd build
   cmake ..
   make

9. If you encounter errors of following type:

   cc1: all warnings being treated as errors

   what takes place in Ubuntu 21.10 and newer, then issue in current directory (build) command as below:

   grep -r "Werror" *

   and next in all files found replace string:

   -Werror -Wno-error=dangling-else

   with:

   -Wno-error

   and after that changes compile application again.
10. After successful compilation linuxdeploy program will be placed in subdirectory:

    bin

linuxdeploy sources are here:

git clone https://github.com/linuxdeploy/linuxdeploy.git

linuxdeploy appimage plugin sources are here:

git clone https://github.com/linuxdeploy/linuxdeploy-plugin-appimage.git
cd linuxdeploy-plugin-appimage/lib
rm -rf args
git clone https://github.com/Taywee/args.git

AppImageKit is here:

git clone https://github.com/AppImage/AppImageKit.git

Compilation process:

1. cd linuxdeploy
2. git submodule update --init --recursive
   It can takes quite a lot of time so be patient and don't stop the process
3. mkdir build
4. cd build
5. cmake ..
6. make
7. If you encounter errors of following type:

   cc1: all warnings being treated as errors

   what takes place in Ubuntu 21.10 and newer, then issue in current directory (build) command as below:

   grep -r "Werror" *

   and next in all files found replace string:

   -Werror -Wno-error=dangling-else

   with:

   -Wno-error

   and after that changes compile application again.
8. sudo cp bin/* /usr/local/bin/

1. cd linuxdeploy-plugin-appimage
2. mkdir build
3. cd build
4. cmake ..
5. make
6. sudo cp src/linuxdeploy-plugin-appimage /usr/local/bin/

1. cd AppImageKit
2. ./build.sh (build process requires internet connection)
3. sudo mkdir /usr/local/lib/appimagekit
4. sudo cp build/mksquashfs-prefix/mksquashfs /usr/local/lib/appimagekit/
5. sudo cp build/src/appimagetool /usr/local/bin/