Build mode

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

@@ -136,6 +136,11 @@ class RunCBuilder {
           '-o',
           outDir.resolve('out.o').toFilePath(),
         ],
+        // TODO(https://github.com/dart-lang/native/issues/50): The defines
+        // should probably be configurable. That way, the mapping from
+        // build_mode to defines can be defined in a project-dependent way in
+        // each project build.dart.
+        '-D${buildConfig.buildMode.name.toUpperCase()}=1'
       ],
       logger: logger,
       captureOutput: false,
@@ -170,6 +175,11 @@ class RunCBuilder {
     final result = await runProcess(
       executable: compiler.uri,
       arguments: [
+        // TODO(https://github.com/dart-lang/native/issues/50): The defines
+        // should probably be configurable. That way, the mapping from
+        // build_mode to defines can be defined in a project-dependent way in
+        // each project build.dart.
+        '/D${buildConfig.buildMode.name.toUpperCase()}',
         if (executable != null) ...[
           ...sources.map((e) => e.toFilePath()),
           '/link',

pkgs/c_compiler/test/cbuilder/cbuilder_build_failure_test.dart

@@ -35,6 +35,7 @@ void main() {
           packageRoot: tempUri,
           target: Target.current,
           linkModePreference: LinkModePreference.dynamic,
+          buildMode: BuildMode.release,
           cCompiler: CCompilerConfig(
             cc: cc,
             envScript: envScript,

pkgs/c_compiler/test/cbuilder/cbuilder_cross_android_test.dart

@@ -117,6 +117,7 @@ Future<Uri> buildLib(
     packageRoot: tempUri,
     target: target,
     targetAndroidNdkApi: androidNdkApi,
+    buildMode: BuildMode.release,
     linkModePreference: linkMode == LinkMode.dynamic
         ? LinkModePreference.dynamic
         : LinkModePreference.static,

pkgs/c_compiler/test/cbuilder/cbuilder_cross_ios_test.dart

@@ -60,6 +60,7 @@ void main() {
                 outDir: tempUri,
                 packageRoot: tempUri,
                 target: target,
+                buildMode: BuildMode.release,
                 linkModePreference: linkMode == LinkMode.dynamic
                     ? LinkModePreference.dynamic
                     : LinkModePreference.static,

pkgs/c_compiler/test/cbuilder/cbuilder_cross_linux_host_test.dart

@@ -46,6 +46,7 @@ void main() {
             outDir: tempUri,
             packageRoot: tempUri,
             target: target,
+            buildMode: BuildMode.release,
             linkModePreference: linkMode == LinkMode.dynamic
                 ? LinkModePreference.dynamic
                 : LinkModePreference.static,

pkgs/c_compiler/test/cbuilder/cbuilder_cross_macos_host_test.dart

@@ -46,6 +46,7 @@ void main() {
             outDir: tempUri,
             packageRoot: tempUri,
             target: target,
+            buildMode: BuildMode.release,
             linkModePreference: linkMode == LinkMode.dynamic
                 ? LinkModePreference.dynamic
                 : LinkModePreference.static,

pkgs/c_compiler/test/cbuilder/cbuilder_cross_windows_host_test.dart

@@ -58,6 +58,7 @@ void main() {
             outDir: tempUri,
             packageRoot: tempUri,
             target: target,
+            buildMode: BuildMode.release,
             linkModePreference: linkMode == LinkMode.dynamic
                 ? LinkModePreference.dynamic
                 : LinkModePreference.static,

pkgs/c_compiler/test/cbuilder/cbuilder_test.dart

@@ -19,49 +19,55 @@ import 'package:test/test.dart';
 import '../helpers.dart';
 
 void main() {
-  test('Cbuilder executable', () async {
-    await inTempDir((tempUri) async {
-      final helloWorldCUri = packageUri
-          .resolve('test/cbuilder/testfiles/hello_world/src/hello_world.c');
-      if (!await File.fromUri(helloWorldCUri).exists()) {
-        throw Exception('Run the test from the root directory.');
-      }
-      const name = 'hello_world';
+  for (final buildMode in BuildMode.values) {
+    test('Cbuilder executable $buildMode', () async {
+      await inTempDir((tempUri) async {
+        final helloWorldCUri = packageUri
+            .resolve('test/cbuilder/testfiles/hello_world/src/hello_world.c');
+        if (!await File.fromUri(helloWorldCUri).exists()) {
+          throw Exception('Run the test from the root directory.');
+        }
+        const name = 'hello_world';
 
-      final buildConfig = BuildConfig(
-        outDir: tempUri,
-        packageRoot: tempUri,
-        target: Target.current,
-        // Ignored by executables.
-        linkModePreference: LinkModePreference.dynamic,
-        cCompiler: CCompilerConfig(
-          cc: cc,
-          envScript: envScript,
-          envScriptArgs: envScriptArgs,
-        ),
-      );
-      final buildOutput = BuildOutput();
-      final cbuilder = CBuilder.executable(
-        name: name,
-        sources: [helloWorldCUri.toFilePath()],
-      );
-      await cbuilder.run(
-        buildConfig: buildConfig,
-        buildOutput: buildOutput,
-        logger: logger,
-      );
+        final buildConfig = BuildConfig(
+          outDir: tempUri,
+          packageRoot: tempUri,
+          target: Target.current,
+          buildMode: buildMode,
+          // Ignored by executables.
+          linkModePreference: LinkModePreference.dynamic,
+          cCompiler: CCompilerConfig(
+            cc: cc,
+            envScript: envScript,
+            envScriptArgs: envScriptArgs,
+          ),
+        );
+        final buildOutput = BuildOutput();
+        final cbuilder = CBuilder.executable(
+          name: name,
+          sources: [helloWorldCUri.toFilePath()],
+        );
+        await cbuilder.run(
+          buildConfig: buildConfig,
+          buildOutput: buildOutput,
+          logger: logger,
+        );
 
-      final executableUri =
-          tempUri.resolve(Target.current.os.executableFileName(name));
-      expect(await File.fromUri(executableUri).exists(), true);
-      final result = await runProcess(
-        executable: executableUri,
-        logger: logger,
-      );
-      expect(result.exitCode, 0);
-      expect(result.stdout.trim(), 'Hello world.');
+        final executableUri =
+            tempUri.resolve(Target.current.os.executableFileName(name));
+        expect(await File.fromUri(executableUri).exists(), true);
+        final result = await runProcess(
+          executable: executableUri,
+          logger: logger,
+        );
+        expect(result.exitCode, 0);
+        if (buildMode == BuildMode.debug) {
+          expect(result.stdout.trim(), startsWith('Running in debug mode.'));
+        }
+        expect(result.stdout.trim(), endsWith('Hello world.'));
+      });
     });
-  });
+  }
 
   for (final dryRun in [true, false]) {
     final testSuffix = dryRun ? ' dry_run' : '';
@@ -78,6 +84,7 @@ void main() {
             outDir: tempUri,
             packageRoot: tempUri,
             target: Target.current,
+            buildMode: BuildMode.release,
             linkModePreference: LinkModePreference.dynamic,
             cCompiler: CCompilerConfig(
               cc: cc,

pkgs/c_compiler/test/cbuilder/compiler_resolver_test.dart

@@ -44,6 +44,7 @@ void main() {
         outDir: tempUri,
         packageRoot: tempUri,
         target: Target.current,
+        buildMode: BuildMode.release,
         linkModePreference: LinkModePreference.dynamic,
         cCompiler: CCompilerConfig(
           ar: ar,
@@ -67,6 +68,7 @@ void main() {
         outDir: tempUri,
         packageRoot: tempUri,
         target: Target.windowsX64,
+        buildMode: BuildMode.release,
         linkModePreference: LinkModePreference.dynamic,
       );
       final resolver = CompilerResolver(

pkgs/c_compiler/test/cbuilder/testfiles/add/src/add.c

@@ -4,12 +4,19 @@
 
 #include <stdint.h>
 
+#ifdef DEBUG
+#include <stdio.h>
+#endif
+
 #if _WIN32
 #define FFI_EXPORT __declspec(dllexport)
 #else
 #define FFI_EXPORT
 #endif
 
 FFI_EXPORT int32_t add(int32_t a, int32_t b) {
-   return a + b;
+#ifdef DEBUG
+  printf("Adding %i and %i.\n", a, b);
+#endif
+  return a + b;
 }

pkgs/c_compiler/test/cbuilder/testfiles/hello_world/src/hello_world.c

@@ -5,6 +5,9 @@
 #include <stdio.h>
 
 int main() {
-   printf("Hello world.\n");
-   return 0;
+#ifdef DEBUG
+  printf("Running in debug mode.\n");
+#endif
+  printf("Hello world.\n");
+  return 0;
 }

pkgs/native_assets_cli/example/native_add/src/native_add.c

@@ -4,6 +4,13 @@
 
 #include "native_add.h"
 
+#ifdef DEBUG
+#include <stdio.h>
+#endif
+
 int32_t add(int32_t a, int32_t b) {
-   return a + b;
+#ifdef DEBUG
+  printf("Adding %i and %i.\n", a, b);
+#endif
+  return a + b;
 }

pkgs/native_assets_cli/lib/native_assets_cli.dart

@@ -8,6 +8,7 @@ library native_assets_cli;
 
 export 'src/model/asset.dart';
 export 'src/model/build_config.dart';
+export 'src/model/build_mode.dart';
 export 'src/model/build_output.dart';
 export 'src/model/dependencies.dart';
 export 'src/model/ios_sdk.dart';

pkgs/native_assets_cli/lib/src/model/build_config.dart

@@ -11,6 +11,7 @@ import 'package:pub_semver/pub_semver.dart';
 
 import '../utils/map.dart';
 import '../utils/yaml.dart';
+import 'build_mode.dart';
 import 'ios_sdk.dart';
 import 'link_mode_preference.dart';
 import 'metadata.dart';
@@ -65,6 +66,10 @@ class BuildConfig {
   bool get dryRun => _dryRun ?? false;
   late final bool? _dryRun;
 
+  /// The build mode that the code should be compiled in.
+  BuildMode get buildMode => _buildMode;
+  late final BuildMode _buildMode;
+
   /// The underlying config.
   ///
   /// Can be used for easier access to values on [dependencyMetadata].
@@ -74,6 +79,7 @@ class BuildConfig {
   factory BuildConfig({
     required Uri outDir,
     required Uri packageRoot,
+    required BuildMode buildMode,
     required Target target,
     IOSSdk? targetIOSSdk,
     int? targetAndroidNdkApi,
@@ -85,6 +91,7 @@ class BuildConfig {
     final nonValidated = BuildConfig._()
       .._outDir = outDir
       .._packageRoot = packageRoot
+      .._buildMode = buildMode
       .._target = target
       .._targetIOSSdk = targetIOSSdk
       .._targetAndroidNdkApi = targetAndroidNdkApi
@@ -107,6 +114,7 @@ class BuildConfig {
   static String checksum({
     required Uri packageRoot,
     required Target target,
+    required BuildMode buildMode,
     IOSSdk? targetIOSSdk,
     int? targetAndroidNdkApi,
     CCompilerConfig? cCompiler,
@@ -119,6 +127,7 @@ class BuildConfig {
       target.toString(),
       targetIOSSdk.toString(),
       targetAndroidNdkApi.toString(),
+      buildMode.toString(),
       linkModePreference.toString(),
       cCompiler?.ar.toString(),
       cCompiler?.cc.toString(),
@@ -228,6 +237,12 @@ class BuildConfig {
       (config) => _outDir = config.path(outDirConfigKey, mustExist: true),
       (config) =>
           _packageRoot = config.path(packageRootConfigKey, mustExist: true),
+      (config) => _buildMode = BuildMode.fromString(
+            config.string(
+              BuildMode.configKey,
+              validValues: BuildMode.values.map((e) => '$e'),
+            ),
+          ),
       (config) {
         _target = Target.fromString(
           config.string(
@@ -312,6 +327,7 @@ class BuildConfig {
     return {
       outDirConfigKey: _outDir.toFilePath(),
       packageRootConfigKey: _packageRoot.toFilePath(),
+      BuildMode.configKey: _buildMode.toString(),
       Target.configKey: _target.toString(),
       if (_targetIOSSdk != null) IOSSdk.configKey: _targetIOSSdk.toString(),
       if (_targetAndroidNdkApi != null)
@@ -337,6 +353,7 @@ class BuildConfig {
     }
     if (other._outDir != _outDir) return false;
     if (other._packageRoot != _packageRoot) return false;
+    if (other._buildMode != _buildMode) return false;
     if (other._target != _target) return false;
     if (other._targetIOSSdk != _targetIOSSdk) return false;
     if (other._targetAndroidNdkApi != _targetAndroidNdkApi) return false;
@@ -352,6 +369,7 @@ class BuildConfig {
   int get hashCode => Object.hash(
         _outDir,
         _packageRoot,
+        _buildMode,
         _target,
         _targetIOSSdk,
         _targetAndroidNdkApi,

pkgs/native_assets_cli/lib/src/model/build_mode.dart

@@ -0,0 +1,26 @@
+// Copyright (c) 2023, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+class BuildMode {
+  final String name;
+
+  const BuildMode._(this.name);
+
+  static const debug = BuildMode._('debug');
+  static const release = BuildMode._('release');
+
+  static const values = [
+    debug,
+    release,
+  ];
+
+  factory BuildMode.fromString(String target) =>
+      values.firstWhere((e) => e.name == target);
+
+  /// The `package:config` key preferably used.
+  static const String configKey = 'build_mode';
+
+  @override
+  String toString() => name;
+}

pkgs/native_assets_cli/test/example/native_add_test.dart

@@ -41,6 +41,7 @@ void main() async {
           '-Dout_dir=${tempUri.toFilePath()}',
           '-Dpackage_root=${testPackageUri.toFilePath()}',
           '-Dtarget=${Target.current}',
+          '-Dbuild_mode=debug',
           '-Dlink_mode_preference=dynamic',
           if (cc != null) '-Dcc=${cc!.toFilePath()}',
           if (envScript != null)