Move some linkopts to features

bazelbuild/rules_apple#2214

Author: keith

crosstool/cc_toolchain_config.bzl

@@ -993,6 +993,38 @@ def _impl(ctx):
         ],
     )
 
+    link_dylib_feature = feature(
+        name = "link_dylib",
+        flag_sets = [
+            flag_set(
+                actions = _DYNAMIC_LINK_ACTIONS,
+                flag_groups = [
+                    flag_group(
+                        flags = [
+                            "-dynamiclib",
+                        ],
+                    ),
+                ],
+            ),
+        ],
+    )
+
+    link_bundle_feature = feature(
+        name = "link_bundle",
+        flag_sets = [
+            flag_set(
+                actions = _DYNAMIC_LINK_ACTIONS,
+                flag_groups = [
+                    flag_group(
+                        flags = [
+                            "-bundle",
+                        ],
+                    ),
+                ],
+            ),
+        ],
+    )
+
     no_deduplicate_feature = feature(
         name = "no_deduplicate",
         enabled = True,
@@ -2511,6 +2543,8 @@ def _impl(ctx):
         ubsan_feature,
         default_sanitizer_flags_feature,
         treat_warnings_as_errors_feature,
+        link_dylib_feature,
+        link_bundle_feature,
     ]
 
     if (ctx.attr.cpu == "darwin_x86_64" or

test/linking_tests.bzl

@@ -64,3 +64,19 @@ def linking_test_suite(name):
         mnemonic = "ObjcLink",
         target_under_test = "//test/test_data:macos_binary",
     )
+
+    default_test(
+        name = "{}_dylib_test".format(name),
+        tags = [name],
+        expected_argv = [
+            "-Xlinker",
+            "-objc_abi_version",
+            "-Xlinker",
+            "2",
+            "-ObjC",
+            "-dynamiclib",
+        ],
+        not_expected_argv = [],
+        mnemonic = "ObjcLink",
+        target_under_test = "//test/test_data:macos_dylib",
+    )

test/starlark_apple_binary.bzl

@@ -2,10 +2,28 @@
 
 load("//test:transitions.bzl", "apple_platform_split_transition")
 
+_supports_extra_requested_features = hasattr(apple_common.platform_type, "visionos")
+
 def _starlark_apple_binary_impl(ctx):
+    extra_requested_features = []
+    bazel_6_linkopts = []
+    if ctx.attr.binary_type == "dylib":
+        extra_requested_features.append("link_dylib")
+        bazel_6_linkopts = ["-dynamiclib"]
+    elif ctx.attr.binary_type == "loadable_bundle":
+        extra_requested_features.append("link_bundle")
+        bazel_6_linkopts = ["-bundle"]
+
+    kwargs = {}
+    if _supports_extra_requested_features:
+        kwargs["extra_requested_features"] = extra_requested_features
+    else:
+        kwargs["extra_linkopts"] = bazel_6_linkopts
+
     link_result = apple_common.link_multi_arch_binary(
         ctx = ctx,
         stamp = ctx.attr.stamp,
+        **kwargs
     )
     processed_binary = ctx.actions.declare_file(
         "{}_lipobin".format(ctx.label.name),
@@ -65,7 +83,10 @@ starlark_apple_binary = rule(
             default = Label("@bazel_tools//tools/objc:xcrunwrapper"),
             executable = True,
         ),
-        "binary_type": attr.string(default = "executable"),
+        "binary_type": attr.string(
+            default = "executable",
+            values = ["dylib", "executable", "loadable_bundle"],
+        ),
         "bundle_loader": attr.label(),
         "deps": attr.label_list(
             cfg = apple_platform_split_transition,

test/test_data/BUILD

@@ -52,6 +52,15 @@ cc_library(
     tags = TARGETS_UNDER_TEST_TAGS,
 )
 
+starlark_apple_binary(
+    name = "macos_dylib",
+    binary_type = "dylib",
+    minimum_os_version = "13.0",
+    platform_type = "macos",
+    tags = TARGETS_UNDER_TEST_TAGS,
+    deps = [":cc_lib"],
+)
+
 objc_library(
     name = "objc_lib",
     srcs = ["objc_lib.m"],