Fix some qt6 builds

- Fixes build and package for at least Ubuntu 24.04
- Defaulted to building and statically linking mpvqt as most platforms
  lack packages for it.
- Workaround mpvqt requiring qt>=6.5 for wayland support with a few
  workarounds when statically building.
- Additionally, default to xcb on qt<6.5 due to mpvqt using qt>=6.5
  fetures for wayland. Wayland can be forced, but seems to give black
  video.

.github/workflows/main.yml

@@ -11,6 +11,8 @@ jobs:
     runs-on: macos-13
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
     - name: Install dependencies
       run: |
         brew update
@@ -50,6 +52,8 @@ jobs:
     runs-on: macos-14
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
     - name: Install dependencies
       run: |
         brew update
@@ -78,6 +82,8 @@ jobs:
     runs-on: windows-latest
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
     - name: Install Qt 6
       uses: jurplel/install-qt-action@v3
       with:
@@ -107,7 +113,7 @@ jobs:
         call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat"
         cd build
         set PATH=%PATH%;C:\Program Files (x86)\WiX Toolset v3.11\bin;%CD%
-        cmake -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=output -DCMAKE_MAKE_PROGRAM=ninja.exe -DQTROOT=%Qt6_DIR% -DMPV_INCLUDE_DIR=mpv/include -DMPV_LIBRARY=mpv/libmpv-2.dll -DCMAKE_INSTALL_PREFIX=output ..
+        cmake -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=output -DCMAKE_MAKE_PROGRAM=ninja.exe -DQTROOT=%Qt6_DIR% -DMPV_INCLUDE_DIR=mpv/include -DMPV_LIBRARY=mpv/libmpv-2.dll ..
         lib /def:mpv\mpv.def /out:mpv\libmpv-2.dll.lib /MACHINE:X64
         ninja
         ninja windows_package
@@ -122,6 +128,8 @@ jobs:
     runs-on: windows-latest
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
     - name: Install Qt 6
       uses: jurplel/install-qt-action@v4
       with:
@@ -151,7 +159,7 @@ jobs:
         call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat"
         cd build
         set PATH=%PATH%;C:\Program Files (x86)\WiX Toolset v3.11\bin;%CD%
-        cmake -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=output -DCMAKE_MAKE_PROGRAM=ninja.exe -DQTROOT=%Qt6_DIR% -DMPV_INCLUDE_DIR=mpv/include -DMPV_LIBRARY=mpv/libmpv-2.dll -DCMAKE_INSTALL_PREFIX=output ..
+        cmake -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=output -DCMAKE_MAKE_PROGRAM=ninja.exe -DQTROOT=%Qt6_DIR% -DMPV_INCLUDE_DIR=mpv/include -DMPV_LIBRARY=mpv/libmpv-2.dll ..
         lib /def:mpv\mpv.def /out:mpv\libmpv-2.dll.lib /MACHINE:X64
         ninja
         ninja windows_package
@@ -166,6 +174,8 @@ jobs:
     runs-on: windows-latest
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
     - name: Install Qt 6
       uses: jurplel/install-qt-action@v4
       with:
@@ -195,7 +205,7 @@ jobs:
         call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars32.bat"
         cd build
         set PATH=%PATH%;C:\Program Files (x86)\WiX Toolset v3.11\bin;%CD%
-        cmake -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=output -DCMAKE_MAKE_PROGRAM=ninja.exe -DQTROOT=%Qt6_DIR% -DMPV_INCLUDE_DIR=mpv/include -DMPV_LIBRARY=mpv/libmpv-2.dll -DCMAKE_INSTALL_PREFIX=output ..
+        cmake -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=output -DCMAKE_MAKE_PROGRAM=ninja.exe -DQTROOT=%Qt6_DIR% -DMPV_INCLUDE_DIR=mpv/include -DMPV_LIBRARY=mpv/libmpv-2.dll ..
         lib /def:mpv\mpv.def /out:mpv\libmpv-2.dll.lib /MACHINE:X86
         ninja
         ninja windows_package
@@ -214,6 +224,8 @@ jobs:
     runs-on: "ubuntu-latest"
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
     - name: Install dependencies
       run: |
         sudo apt-get update
@@ -285,6 +297,8 @@ jobs:
     runs-on: "ubuntu-latest"
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
     - name: Install dependencies
       run: |
         sudo apt-get update

.github/workflows/test.yml

@@ -11,6 +11,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
 
     - name: Install build dependencies from debian/control
       run: |