This section describes how to build AppImageUpdate.AppImage and appimageupdatetool.AppImage. This implies using as few -dev packages from the distribution as possible and privately bundling everything that cannot reasonably be assumed to be there in the default installation of all target systems (distributions).
This section describes how to build libappimageupdate for consumption in distribution packaging. This implies using as many -dev packages from the distribution as possible.
# Install dependencies
sudo apt-get update
sudo apt-get install -y --no-install-recommends software-properties-common
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo add-apt-repository -y ppa:beineri/opt-qt-5.15.2-focal
sudo apt-get update
sudo apt-get install -y g++-10 qt515base qt515wayland libgl1 libdrm-dev mesa-common-dev build-essential libssl-dev \
autoconf automake libtool wget vim-common desktop-file-utils pkgconf libgpgme-dev libglib2.0-dev libcairo2-dev \
librsvg2-dev libfuse-dev git libcurl4-openssl-dev argagg-dev libgcrypt20-dev libboost-dev libarchive-dev \
libzstd-dev nlohmann-json3-dev cmake
# Build
export CXX=g++-10
mkdir build
cd build
cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_TESTING=OFF
make -j$(nproc)
sudo make install
cd ..