use unity builds in CI

.appveyor.yml

@@ -107,7 +107,7 @@ for:
 
     build_script:
       # Build MMapper within a Docker container using the current working path as a volume
-      - sh: sudo docker run --rm -v "$(pwd)":/root/mmapper --cap-add SYS_ADMIN --cap-add MKNOD --device /dev/fuse:mrw --security-opt apparmor:unconfined ubuntu:18.04 bash -c 'apt update -qq && apt install -y wget software-properties-common && add-apt-repository ppa:ecal/cmake-3.25 && add-apt-repository ppa:beineri/opt-qt-5.15.2-bionic -y && apt install -y qt515base libgl1-mesa-dev build-essential git zlib1g-dev libssl-dev wget zsync fuse cmake libminiupnpc-dev && source /opt/qt*/bin/qt*-env.sh && cd /root/mmapper && mkdir -p build && cd build && cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr && make -j$(getconf _NPROCESSORS_ONLN) DESTDIR=appdir install && QT_QPA_PLATFORM=offscreen ctest -V --no-compress-output -T test && export VERSION=$(grep -i "SET(CPACK_PACKAGE_VERSION " CPackConfig.cmake | cut -d\" -f 2) && wget https://github.com/probonopd/linuxdeployqt/releases/download/continuous/linuxdeployqt-continuous-x86_64.AppImage && chmod a+x linuxdeployqt-continuous-x86_64.AppImage && ./linuxdeployqt-continuous-x86_64.AppImage appdir/usr/share/applications/org.mume.MMapper.desktop -updateinformation="gh-releases-zsync|MUME|MMapper|latest|MMapper-*-x86_64.AppImage.zsync" -appimage'
+      - sh: sudo docker run --rm -v "$(pwd)":/root/mmapper --cap-add SYS_ADMIN --cap-add MKNOD --device /dev/fuse:mrw --security-opt apparmor:unconfined ubuntu:18.04 bash -c 'apt update -qq && apt install -y wget software-properties-common && add-apt-repository ppa:ecal/cmake-3.25 && add-apt-repository ppa:beineri/opt-qt-5.15.2-bionic -y && apt install -y qt515base libgl1-mesa-dev build-essential git zlib1g-dev libssl-dev wget zsync fuse cmake libminiupnpc-dev && source /opt/qt*/bin/qt*-env.sh && cd /root/mmapper && mkdir -p build && cd build && cmake .. -DCMAKE_BUILD_TYPE=Release -DUSE_UNITY_BUILD=ON -DCMAKE_INSTALL_PREFIX=/usr && make -j$(getconf _NPROCESSORS_ONLN) DESTDIR=appdir install && QT_QPA_PLATFORM=offscreen ctest -V --no-compress-output -T test && export VERSION=$(grep -i "SET(CPACK_PACKAGE_VERSION " CPackConfig.cmake | cut -d\" -f 2) && wget https://github.com/probonopd/linuxdeployqt/releases/download/continuous/linuxdeployqt-continuous-x86_64.AppImage && chmod a+x linuxdeployqt-continuous-x86_64.AppImage && ./linuxdeployqt-continuous-x86_64.AppImage appdir/usr/share/applications/org.mume.MMapper.desktop -updateinformation="gh-releases-zsync|MUME|MMapper|latest|MMapper-*-x86_64.AppImage.zsync" -appimage'
       - sh: sudo mv build/*.AppImage* .
       - sh: export FILE=$(find . -type f -name MMapper*.AppImage | sed 's#./##')
       - sh: sha256sum $FILE > $FILE.sha256
@@ -153,7 +153,7 @@ for:
     build_script:
       - sh: mkdir build
       - sh: cd build
-      - sh: cmake .. -G "Ninja" -DCMAKE_BUILD_TYPE=RelWithDebInfo -DTARGET_ARCHITECTURE=$TARGET_ARCHITECTURE
+      - sh: cmake .. -G "Ninja" -DCMAKE_BUILD_TYPE=RelWithDebInfo -DTARGET_ARCHITECTURE=$TARGET_ARCHITECTURE -DUSE_UNITY_BUILD=ON
       - sh: cmake --build . -j$(getconf _NPROCESSORS_ONLN)
       - sh: cpack
       - sh: mv *.deb* ../
@@ -254,7 +254,7 @@ for:
       - cmd: cd c:\Build\MMapper
       - cmd: md winbuild
       - cmd: cd winbuild
-      - cmd: cmake .. -DCMAKE_BUILD_TYPE=RelWithDebInfo -G %CMAKE_GENERATOR% "-DCMAKE_PREFIX_PATH=%QTDIR%" "-DOPENSSL_ROOT_DIR=%OPENSSLDIR%"
+      - cmd: cmake .. -DCMAKE_BUILD_TYPE=RelWithDebInfo -G %CMAKE_GENERATOR% "-DCMAKE_PREFIX_PATH=%QTDIR%" "-DOPENSSL_ROOT_DIR=%OPENSSLDIR%" -DUSE_UNITY_BUILD=ON
       - cmd: cmake --build . -j %NUMBER_OF_PROCESSORS%
       - cmd: cpack
       - ps: move *.exe* ../
@@ -308,7 +308,7 @@ for:
       - cmd: cd c:\Build\MMapper
       - cmd: md winbuild
       - cmd: cd winbuild
-      - cmd: cmake .. -DCMAKE_BUILD_TYPE=RelWithDebInfo -G %CMAKE_GENERATOR% "-DCMAKE_PREFIX_PATH=%QTDIR%" "-DOPENSSL_ROOT_DIR=%OPENSSLDIR%"
+      - cmd: cmake .. -DCMAKE_BUILD_TYPE=RelWithDebInfo -G %CMAKE_GENERATOR% "-DCMAKE_PREFIX_PATH=%QTDIR%" "-DOPENSSL_ROOT_DIR=%OPENSSLDIR%" -DUSE_UNITY_BUILD=ON
       - cmd: cmake --build . -j %NUMBER_OF_PROCESSORS%
       - cmd: cpack
       - ps: move *.exe* ../