chore: Update Linux build files

linux/CMakeLists.txt

@@ -8,6 +8,16 @@ cmake_policy(SET CMP0063 NEW)
 
 set(CMAKE_INSTALL_RPATH "$ORIGIN/lib")
 
+# Root filesystem for cross-building.
+if(FLUTTER_TARGET_PLATFORM_SYSROOT)
+  set(CMAKE_SYSROOT ${FLUTTER_TARGET_PLATFORM_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+endif()
+
 # Configure build options.
 if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
   set(CMAKE_BUILD_TYPE "Debug" CACHE

linux/flutter/CMakeLists.txt

@@ -24,8 +24,6 @@ find_package(PkgConfig REQUIRED)
 pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
 pkg_check_modules(GLIB REQUIRED IMPORTED_TARGET glib-2.0)
 pkg_check_modules(GIO REQUIRED IMPORTED_TARGET gio-2.0)
-pkg_check_modules(BLKID REQUIRED IMPORTED_TARGET blkid)
-pkg_check_modules(LZMA REQUIRED IMPORTED_TARGET liblzma)
 
 set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/libflutter_linux_gtk.so")
 
@@ -67,8 +65,6 @@ target_link_libraries(flutter INTERFACE
   PkgConfig::GTK
   PkgConfig::GLIB
   PkgConfig::GIO
-  PkgConfig::BLKID
-  PkgConfig::LZMA
 )
 add_dependencies(flutter flutter_assemble)
 

linux/my_application.cc

@@ -100,5 +100,6 @@ static void my_application_init(MyApplication* self) {}
 MyApplication* my_application_new() {
   return MY_APPLICATION(g_object_new(my_application_get_type(),
                                      "application-id", APPLICATION_ID,
+                                     "flags", G_APPLICATION_NON_UNIQUE,
                                      nullptr));
 }