Build Qt from source in circleci

.circleci/config.yml

@@ -20,6 +20,25 @@ jobs:
     steps:
       - checkout
 
+      # https://wiki.qt.io/Building_Qt_5_from_Git
+      - run:
+          name: build Qt5 from source
+          command: |
+            sudo sh -c 'echo "deb-src http://deb.debian.org/debian buster main" >> /etc/apt/sources.list'
+            sudo apt-get update
+            sudo apt-get build-dep qt5-default -y
+            sudo apt-get install -y libxcb-xinerama0-dev
+            sudo apt-get install -y build-essential perl python git
+            sudo apt-get install -y '^libxcb.*-dev' libx11-xcb-dev libglu1-mesa-dev libxrender-dev libxi-dev libxkbcommon-dev libxkbcommon-x11-dev
+            git clone git://code.qt.io/qt/qt5.git ~/qt5
+            cd ~/qt5
+            git checkout 5.14.0
+            perl init-repository
+            export LLVM_INSTALL_DIR=/usr/llvm
+            ./configure -developer-build -opensource -confirm-license -nomake examples -nomake tests
+            make -j$(nproc)
+            make install
+
       - run:
           name: install dependencies
           command: |
@@ -28,7 +47,6 @@ jobs:
             sudo pip3 install poetry flake8
             poetry install
 
-      # run tests!
       - run:
           name: run flake tests
           command: |