docker-build-qt

This container can be used to build QT (v6.2.1) linux desktop applications using cmake (3.21.4).

Container volumes

Qt was installed in the container in the directory /opt/qt. The working directory of the container is /src. Both directories are propagated as container volume.

CMake default environment variables

There are the following ENV variables defined:

• CMAKE_PREFIX_PATH=/opt/qt/6.2.1/gcc_64
• CMAKE_BUILD_TYPE=Release

How to use

Prepare the make files

1. To create the make files using the cmake defaults from an application which is stored in the current working directory:

docker run -it -v$(pwd):/src ondrno/build-qt cmake -B build

2. The same but configuring a "Debug" build:

docker run -it -v$(pwd):/src -e CMAKE_BUILD_TYPE=Debug ondrno/build-qt cmake -B build

3. The same but configuring a "RelWithDebInfo" build:

docker run -it -v$(pwd):/src -e CMAKE_BUILD_TYPE=RelWithDebInfo ondrno/build-qt cmake -B build

Build the application

Once the make files were generated you can build the application:

docker run -it -v$(pwd):/src ondrno/build-qt:latest cmake --build build

Use the container in a CI pipeline

When using the container in a CI pipeline it might happen that the src directory is write proteced.

This happens because the docker container runs under a different user id than the process on the host which started the container. You can solve this problem by passing an additional environment variable LOCAL_USER_ID to the docker run command, i.e.

docker run -it -v$(pwd):/src -e LOCAL_USER_ID=`id -u $USER` ondrno/build-qt cmake -B build

This will run the cmake -B build command under the same user id as the current user.