Github Actions Ubuntu 18.04 produces broken .deb packages

[cboulay]

AppVeyor is using a new compiler that has dependencies that don't exist on Ubuntu 18.04 by default.

(Reading database ... 338602 files and directories currently installed.)
Preparing to unpack liblsl.deb ...
Unpacking liblsl (1.14.0) over (1.14.0) ...
dpkg: dependency problems prevent configuration of liblsl:
 liblsl depends on libgcc-s1 (>= 3.0); however:
  Package libgcc-s1 is not installed.
dpkg: error processing package liblsl (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 liblsl

This can be worked around by installing the more modern dependencies on my older OS:

sudo apt update
sudo apt --fix-broken install
cd ~/Desktop/
wget http://mirrors.kernel.org/ubuntu/pool/main/g/gcc-10/gcc-10-base_10-20200411-0ubuntu1_amd64.deb http://mirrors.kernel.org/ubuntu/pool/main/g/gcc-10/libgcc-s1_10-20200411-0ubuntu1_amd64.deb
sudo apt install ./gcc-10-base_10-20200411-0ubuntu1_amd64.deb ./libgcc-s1_10-20200411-0ubuntu1_amd64.deb

Then sudo dpkg -i liblsl.deb works as expected.

A better medium-term solution, as suggested by @tstenner , might be to specify a more compatible compiler.

For reference, I recently setup libxdf to build on GitHub actions and the resulting .deb file didn't have any problems on my Ubuntu 18.04.

[tstenner]

Works on Github Actions (aba29c5b93becce6f25b5371833faa2b44f78de1):

$ dpkg -I liblsl-1.14.0-xenial_amd64.deb 
 neues Debian-Paket, Version 2.0.
 Größe 528502 Byte: control-Archiv= 1011 Byte.
     376 Byte,    12 Zeilen      control              
     968 Byte,    16 Zeilen      md5sums              
      64 Byte,     7 Zeilen   *  postinst             #!/bin/sh
      61 Byte,     7 Zeilen   *  postrm               #!/bin/sh
      39 Byte,     1 Zeilen      shlibs               
 Architecture: amd64
 Depends: liblsl (= 1.14.0-xenial), libc6 (>= 2.17), libgcc1 (>= 1:3.0), libstdc++6 (>= 5.2)
 Description: Labstreaminglayer C/C++ library
  Labstreaminglayer C/C++ library
 Homepage: <https://github.com/sccn/liblsl>
 Maintainer: Tristan Stenner <ttstenner@gmail.com>
 Package: liblsl
 Priority: optional
 Section: devel
 Version: 1.14.0-xenial
 Installed-Size: 2645

[tstenner]

The Github Actions runner for Ubuntu 18.04 builds packages that can't be loaded on stock Ubuntu.

Some other options:

• launchpad PPA: requires a Debian source package and the only sane way to create the CPack components (dh-cmake) isn't in the repositories before Ubuntu 20.10
• docker build (#129): might be the easiest way, especially if the Github Actions configuration could be changed to build some targets with docker and others in the "host" OS
• upload packages built on a local machine