cmake: Download Qt binaries on Linux if needed

If the local version of Qt is older than the minimum version required by
yuzu, download a pre-built binary package from yuzu-emu/ext-linux-bin
and build yuzu with it, instead.

This also requires linking yuzu to the correct libraries after building
it, and copying over the required binaries when building yuzu.

This sets the Qt requirement to 5.12, which is intentionally behind the
versions used by our toolchains since they are not all updated yet to
5.15.

1 files changed, 97 insertions, 38 deletions

diff --git a/CMakeModules/CopyYuzuQt5Deps.cmake b/CMakeModules/CopyYuzuQt5Deps.cmake
index 59343b1ca..4a6aeebbb 100644
--- a/CMakeModules/CopyYuzuQt5Deps.cmake
+++ b/CMakeModules/CopyYuzuQt5Deps.cmake
@@ -1,52 +1,111 @@
 function(copy_yuzu_Qt5_deps target_dir)
     include(WindowsCopyFiles)
-    set(DLL_DEST "${CMAKE_BINARY_DIR}/bin/$<CONFIG>/")
-    set(Qt5_DLL_DIR "${Qt5_DIR}/../../../bin")
+    if (MSVC)
+        set(DLL_DEST "${CMAKE_BINARY_DIR}/bin/$<CONFIG>/")
+        set(Qt5_DLL_DIR "${Qt5_DIR}/../../../bin")
+    else()
+        set(DLL_DEST "${CMAKE_BINARY_DIR}/bin/")
+        set(Qt5_DLL_DIR "${Qt5_DIR}/../../../lib/")
+    endif()
     set(Qt5_PLATFORMS_DIR "${Qt5_DIR}/../../../plugins/platforms/")
+    set(Qt5_PLATFORMTHEMES_DIR "${Qt5_DIR}/../../../plugins/platformthemes/")
+    set(Qt5_PLATFORMINPUTCONTEXTS_DIR "${Qt5_DIR}/../../../plugins/platforminputcontexts/")
+    set(Qt5_XCBGLINTEGRATIONS_DIR "${Qt5_DIR}/../../../plugins/xcbglintegrations/")
     set(Qt5_STYLES_DIR "${Qt5_DIR}/../../../plugins/styles/")
     set(Qt5_IMAGEFORMATS_DIR "${Qt5_DIR}/../../../plugins/imageformats/")
     set(Qt5_RESOURCES_DIR "${Qt5_DIR}/../../../resources/")
     set(PLATFORMS ${DLL_DEST}plugins/platforms/)
     set(STYLES ${DLL_DEST}plugins/styles/)
     set(IMAGEFORMATS ${DLL_DEST}plugins/imageformats/)
-    windows_copy_files(${target_dir} ${Qt5_DLL_DIR} ${DLL_DEST}
-        icudt*.dll
-        icuin*.dll
-        icuuc*.dll
-        Qt5Core$<$<CONFIG:Debug>:d>.*
-        Qt5Gui$<$<CONFIG:Debug>:d>.*
-        Qt5Widgets$<$<CONFIG:Debug>:d>.*
-    )
-
-    if (YUZU_USE_QT_WEB_ENGINE)
-        windows_copy_files(${target_dir} ${Qt5_DLL_DIR} ${DLL_DEST} 
-            Qt5Network$<$<CONFIG:Debug>:d>.*
-            Qt5Positioning$<$<CONFIG:Debug>:d>.*
-            Qt5PrintSupport$<$<CONFIG:Debug>:d>.*
-            Qt5Qml$<$<CONFIG:Debug>:d>.*
-            Qt5Quick$<$<CONFIG:Debug>:d>.*
-            Qt5QuickWidgets$<$<CONFIG:Debug>:d>.*
-            Qt5WebChannel$<$<CONFIG:Debug>:d>.*
-            Qt5WebEngine$<$<CONFIG:Debug>:d>.*
-            Qt5WebEngineCore$<$<CONFIG:Debug>:d>.*
-            Qt5WebEngineWidgets$<$<CONFIG:Debug>:d>.*
-            QtWebEngineProcess$<$<CONFIG:Debug>:d>.*
+    if (MSVC)
+        windows_copy_files(${target_dir} ${Qt5_DLL_DIR} ${DLL_DEST}
+            icudt*.dll
+            icuin*.dll
+            icuuc*.dll
+            Qt5Core$<$<CONFIG:Debug>:d>.*
+            Qt5Gui$<$<CONFIG:Debug>:d>.*
+            Qt5Widgets$<$<CONFIG:Debug>:d>.*
         )
 
-        windows_copy_files(${target_dir} ${Qt5_RESOURCES_DIR} ${DLL_DEST}
-            qtwebengine_resources.pak
-            qtwebengine_devtools_resources.pak
-            qtwebengine_resources_100p.pak
-            qtwebengine_resources_200p.pak
-            icudtl.dat
-        )
-    endif ()
-    windows_copy_files(yuzu ${Qt5_PLATFORMS_DIR} ${PLATFORMS} qwindows$<$<CONFIG:Debug>:d>.*)
-    windows_copy_files(yuzu ${Qt5_STYLES_DIR} ${STYLES} qwindowsvistastyle$<$<CONFIG:Debug>:d>.*)
-    windows_copy_files(yuzu ${Qt5_IMAGEFORMATS_DIR} ${IMAGEFORMATS}
-        qjpeg$<$<CONFIG:Debug>:d>.*
-        qgif$<$<CONFIG:Debug>:d>.*
-        )
+        if (YUZU_USE_QT_WEB_ENGINE)
+            windows_copy_files(${target_dir} ${Qt5_DLL_DIR} ${DLL_DEST}
+                Qt5Network$<$<CONFIG:Debug>:d>.*
+                Qt5Positioning$<$<CONFIG:Debug>:d>.*
+                Qt5PrintSupport$<$<CONFIG:Debug>:d>.*
+                Qt5Qml$<$<CONFIG:Debug>:d>.*
+                Qt5Quick$<$<CONFIG:Debug>:d>.*
+                Qt5QuickWidgets$<$<CONFIG:Debug>:d>.*
+                Qt5WebChannel$<$<CONFIG:Debug>:d>.*
+                Qt5WebEngine$<$<CONFIG:Debug>:d>.*
+                Qt5WebEngineCore$<$<CONFIG:Debug>:d>.*
+                Qt5WebEngineWidgets$<$<CONFIG:Debug>:d>.*
+                QtWebEngineProcess$<$<CONFIG:Debug>:d>.*
+            )
+
+            windows_copy_files(${target_dir} ${Qt5_RESOURCES_DIR} ${DLL_DEST}
+                qtwebengine_resources.pak
+                qtwebengine_devtools_resources.pak
+                qtwebengine_resources_100p.pak
+                qtwebengine_resources_200p.pak
+                icudtl.dat
+            )
+        endif ()
+        windows_copy_files(yuzu ${Qt5_PLATFORMS_DIR} ${PLATFORMS} qwindows$<$<CONFIG:Debug>:d>.*)
+        windows_copy_files(yuzu ${Qt5_STYLES_DIR} ${STYLES} qwindowsvistastyle$<$<CONFIG:Debug>:d>.*)
+        windows_copy_files(yuzu ${Qt5_IMAGEFORMATS_DIR} ${IMAGEFORMATS}
+            qjpeg$<$<CONFIG:Debug>:d>.*
+            qgif$<$<CONFIG:Debug>:d>.*
+            )
+    else()
+        set(Qt5_DLLS
+            "${Qt5_DLL_DIR}libQt5Core.so.5"
+            "${Qt5_DLL_DIR}libQt5DBus.so.5"
+            "${Qt5_DLL_DIR}libQt5Gui.so.5"
+            "${Qt5_DLL_DIR}libQt5Widgets.so.5"
+            "${Qt5_DLL_DIR}libQt5XcbQpa.so.5"
+            "${Qt5_DLL_DIR}libicudata.so.60"
+            "${Qt5_DLL_DIR}libicui18n.so.60"
+            "${Qt5_DLL_DIR}libicuuc.so.60"
+            )
+        set(Qt5_IMAGEFORMAT_DLLS
+            "${Qt5_IMAGEFORMATS_DIR}libqjpeg.so"
+            "${Qt5_IMAGEFORMATS_DIR}libqgif.so"
+            "${Qt5_IMAGEFORMATS_DIR}libqico.so"
+            )
+        set(Qt5_PLATFORMTHEME_DLLS
+            "${Qt5_PLATFORMTHEMES_DIR}libqgtk3.so"
+            "${Qt5_PLATFORMTHEMES_DIR}libqxdgdesktopportal.so"
+            )
+        set(Qt5_PLATFORM_DLLS
+            "${Qt5_PLATFORMS_DIR}libqxcb.so"
+            )
+        set(Qt5_PLATFORMINPUTCONTEXT_DLLS
+            "${Qt5_PLATFORMINPUTCONTEXTS_DIR}libcomposeplatforminputcontextplugin.so"
+            "${Qt5_PLATFORMINPUTCONTEXTS_DIR}libibusplatforminputcontextplugin.so"
+            )
+        set(Qt5_XCBGLINTEGRATION_DLLS
+            "${Qt5_XCBGLINTEGRATIONS_DIR}libqxcb-glx-integration.so"
+            )
+        foreach(LIB ${Qt5_DLLS})
+            file(COPY ${LIB} DESTINATION "${DLL_DEST}/lib" FOLLOW_SYMLINK_CHAIN)
+        endforeach()
+        foreach(LIB ${Qt5_IMAGEFORMAT_DLLS})
+            file(COPY ${LIB} DESTINATION "${DLL_DEST}plugins/imageformats/" FOLLOW_SYMLINK_CHAIN)
+        endforeach()
+        foreach(LIB ${Qt5_PLATFORMTHEME_DLLS})
+            file(COPY ${LIB} DESTINATION "${DLL_DEST}plugins/platformthemes/" FOLLOW_SYMLINK_CHAIN)
+        endforeach()
+        foreach(LIB ${Qt5_PLATFORM_DLLS})
+            file(COPY ${LIB} DESTINATION "${DLL_DEST}plugins/platforms/" FOLLOW_SYMLINK_CHAIN)
+        endforeach()
+        foreach(LIB ${Qt5_PLATFORMINPUTCONTEXT_DLLS})
+            file(COPY ${LIB} DESTINATION "${DLL_DEST}plugins/platforminputcontexts/" FOLLOW_SYMLINK_CHAIN)
+        endforeach()
+        foreach(LIB ${Qt5_XCBGLINTEGRATION_DLLS})
+            file(COPY ${LIB} DESTINATION "${DLL_DEST}plugins/xcbglintegrations/" FOLLOW_SYMLINK_CHAIN)
+        endforeach()
+
+    endif()
     # Create an empty qt.conf file. Qt will detect that this file exists, and use the folder that its in as the root folder.
     # This way it'll look for plugins in the root/plugins/ folder
     add_custom_command(TARGET yuzu POST_BUILD