vcpkg: support building on Linux

cmake/ConfigureVcpkg.cmake

@@ -25,6 +25,11 @@ else()
     option(USE_QT6 "Build using Qt 6 instead of 5" OFF)
 endif()
 
+# Since the Linux build pulls in glib anyway, we can just use upstream libslirp
+if (UNIX AND NOT APPLE)
+    option(USE_SYSTEM_LIBSLIRP "Use system libslirp instead of the bundled version" ON)
+endif()
+
 if (NOT USE_QT6)
     list(APPEND VCPKG_MANIFEST_FEATURES qt5)
     set(VCPKG_MANIFEST_NO_DEFAULT_FEATURES ON)
@@ -62,6 +67,14 @@ if (USE_RECOMMENDED_TRIPLETS)
         # TODO Windows arm64 if possible
         set(_CAN_TARGET_AS_HOST ON)
         set(_WANTED_TRIPLET x64-mingw-static-release)
+    elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL Linux)
+        # Can't really detect cross compiling here.
+        set(_CAN_TARGET_AS_HOST ON)
+        if (_HOST_PROCESSOR STREQUAL x86_64)
+            set(_WANTED_TRIPLET x64-linux-release)
+        elseif(_HOST_PROCESSOR STREQUAL "aarch64")
+            set(_WANTED_TRIPLET arm64-linux-release)
+        endif()
     endif()
 
     # Don't override it if the user set something else

src/frontend/qt_sdl/CMakeLists.txt

@@ -160,7 +160,12 @@ if (BUILD_STATIC)
     if (WIN32 AND USE_QT6)
         qt_import_plugins(melonDS INCLUDE Qt::QModernWindowsStylePlugin)
     endif()
-    target_link_options(melonDS PRIVATE -static)
+    if (USE_VCPKG AND UNIX AND NOT APPLE)
+        pkg_check_modules(ALSA REQUIRED IMPORTED_TARGET alsa)
+        target_link_libraries(melonDS PRIVATE PkgConfig::ALSA)
+    else()
+        target_link_options(melonDS PRIVATE -static)
+    endif()
 endif()
 
 target_include_directories(melonDS PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}")

vcpkg.json

@@ -2,9 +2,22 @@
 	"default-features": ["qt6"],
 	"dependencies": [
 		"sdl2",
+		{
+			"name": "sdl2",
+			"platform": "linux",
+			"features": [ "alsa" ]
+		},
 		"libarchive",
 		"zstd",
-		"enet"
+		"enet",
+		{
+			"name": "ecm",
+			"platform": "linux"
+		},
+		{
+			"name": "libslirp",
+			"platform": "linux"
+		}
 	],
 	"features": {
 		"qt6": {
@@ -15,6 +28,12 @@
 					"default-features": false,
 					"features": ["gui", "png", "thread", "widgets", "opengl", "zstd", "harfbuzz"]
 				},
+				{
+					"name": "qtbase",
+					"platform": "linux",
+					"default-features": false,
+					"features": ["dbus", "xcb", "xkb", "xcb-xlib", "freetype", "fontconfig"]
+				},
 				{
 					"name": "qtbase",
 					"host": true,
@@ -24,6 +43,12 @@
 					"name": "qtmultimedia",
 					"default-features": false
 				},
+				{
+					"name": "qtmultimedia",
+					"platform": "linux",
+					"features": ["gstreamer"],
+					"default-features": false
+				},
 				"qtsvg"
 			]
 		},