add linkWith flag

this is required for linking with libraries on Windows msvc. Hope to port to
other platforms as well.

dart-lang#1221

pkgs/native_toolchain_c/lib/src/cbuilder/cbuilder.dart

@@ -51,6 +51,7 @@ class CBuilder extends CTool implements Builder {
     super.assetName,
     super.sources = const [],
     super.includes = const [],
+    super.linkWith = const [],
     super.frameworks = CTool.defaultFrameworks,
     @Deprecated(
       'Newer Dart and Flutter SDKs automatically add the Dart hook '
@@ -73,6 +74,7 @@ class CBuilder extends CTool implements Builder {
     required super.name,
     super.sources = const [],
     super.includes = const [],
+    super.linkWith = const [],
     super.frameworks = CTool.defaultFrameworks,
     @Deprecated(
       'Newer Dart and Flutter SDKs automatically add the Dart hook '
@@ -135,6 +137,7 @@ class CBuilder extends CTool implements Builder {
         logger: logger,
         sources: sources,
         includes: includes,
+        linkWith: linkWith,
         frameworks: frameworks,
         dynamicLibrary:
             type == OutputType.library && linkMode == DynamicLoadingBundled()

pkgs/native_toolchain_c/lib/src/cbuilder/ctool.dart

@@ -43,6 +43,9 @@ abstract class CTool {
   /// Used to output the [LinkOutput.dependencies].
   final List<String> includes;
 
+  /// Libraries to link with the target (Windows/DLL only)
+  final List<String> linkWith;
+
   /// Frameworks to link.
   ///
   /// Only effective if [language] is [Language.objectiveC].
@@ -123,6 +126,7 @@ abstract class CTool {
     required this.assetName,
     required this.sources,
     required this.includes,
+    required this.linkWith,
     required this.frameworks,
     required this.installName,
     required this.flags,

pkgs/native_toolchain_c/lib/src/cbuilder/run_cbuilder.dart

@@ -25,6 +25,7 @@ class RunCBuilder {
   final Logger? logger;
   final List<Uri> sources;
   final List<Uri> includes;
+  final List<String> linkWith;
   final List<String> frameworks;
   final Uri? executable;
   final Uri? dynamicLibrary;
@@ -51,6 +52,7 @@ class RunCBuilder {
     this.logger,
     this.sources = const [],
     this.includes = const [],
+    this.linkWith = const [],
     required this.frameworks,
     this.executable,
     this.dynamicLibrary,
@@ -335,6 +337,7 @@ class RunCBuilder {
         if (dynamicLibrary != null) ...[
           ...sources.map((e) => e.toFilePath()),
           '/link',
+          ...linkWith,
           '/DLL',
           '/out:${outDir.resolveUri(dynamicLibrary!).toFilePath()}',
         ],