feat: Implement experimental elinux support

flutter_package/cargokit/build_tool/lib/src/target.dart

@@ -51,6 +51,14 @@ class Target {
       rust: 'aarch64-unknown-linux-gnu',
       flutter: 'linux-arm64',
     ),
+    Target(
+      rust: 'x86_64-unknown-linux-gnu',
+      flutter: 'elinux-x64',
+    ),
+    Target(
+      rust: 'aarch64-unknown-linux-gnu',
+      flutter: 'elinux-arm64',
+    ),
     Target(
       rust: 'x86_64-apple-darwin',
       darwinPlatform: 'macosx',

flutter_package/elinux/CMakeLists.txt

@@ -0,0 +1,25 @@
+# The Flutter tooling requires that developers have CMake 3.10 or later
+# installed. You should not increase this version, as doing so will cause
+# the plugin to fail to compile for some customers of the plugin.
+cmake_minimum_required(VERSION 3.10)
+
+# Project-level configuration.
+set(PROJECT_NAME "rinf")
+project(${PROJECT_NAME} LANGUAGES CXX)
+
+# Invoke the build for native code shared with the other target platforms.
+# This can be changed to accommodate different builds.
+add_subdirectory("${CMAKE_CURRENT_SOURCE_DIR}/../src" "${CMAKE_CURRENT_BINARY_DIR}/shared")
+
+# List of absolute paths to libraries that should be bundled with the plugin.
+# This list could contain prebuilt libraries, or libraries created by an
+# external build triggered from this build file.
+set(rinf_bundled_libraries
+  # Defined in ../src/CMakeLists.txt.
+  # This can be changed to accommodate different builds.
+  $<TARGET_FILE:rinf>
+  PARENT_SCOPE
+)
+
+# Include the CMake build file of the Rust code.
+include(./rust.cmake)

flutter_package/elinux/rust.cmake

@@ -0,0 +1,20 @@
+cmake_policy(SET CMP0079 NEW)
+apply_standard_settings(${BINARY_NAME})
+
+set_target_properties(
+  ${BINARY_NAME} PROPERTIES
+  CXX_VISIBILITY_PRESET hidden
+  BUILD_RPATH_USE_ORIGIN ON
+)
+
+target_compile_definitions(${BINARY_NAME} PRIVATE FLUTTER_PLUGIN_IMPL)
+target_link_libraries(${BINARY_NAME} PRIVATE flutter)
+
+include("../cargokit/cmake/cargokit.cmake")
+apply_cargokit(${BINARY_NAME} ${CMAKE_SOURCE_DIR}/../native/hub hub "")
+
+set(
+  rinf_bundled_libraries
+  "${${BINARY_NAME}_cargokit_lib}"
+  PARENT_SCOPE
+)

flutter_package/pubspec.yaml

@@ -45,6 +45,8 @@ flutter:
         ffiPlugin: true
       linux:
         ffiPlugin: true
+      elinux:
+        ffiPlugin: true
       macos:
         ffiPlugin: true
       windows: