Test allowing diamond inheritance of shared lib

examples/test_cc_shared_library/BUILD

@@ -1,6 +1,6 @@
 load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
 load("//cc:defs.bzl", "cc_binary", "cc_library", "cc_test")
-load("//examples:experimental_cc_shared_library.bzl", "LINKABLE_MORE_THAN_ONCE", "cc_shared_library")
+load("//examples:experimental_cc_shared_library.bzl", "LINKABLE_MORE_THAN_ONCE", "cc_shared_library", "cc_shared_library_permissions")
 load(":starlark_tests.bzl", "additional_inputs_test", "build_failure_test", "linking_suffix_test", "paths_test")
 
 package(
@@ -202,3 +202,13 @@ bzl_library(
     srcs = ["starlark_tests.bzl"],
     visibility = ["//visibility:private"],
 )
+
+cc_shared_library_permissions(
+    name = "permissions",
+    targets = [
+        "//examples/test_cc_shared_library:a_suffix",
+        "//examples/test_cc_shared_library:qux",
+        "//examples/test_cc_shared_library:qux2",
+    ],
+    visibility = ["//examples/test_cc_shared_library/diamond_inheritance:__pkg__"],
+)

examples/test_cc_shared_library/diamond_inheritance/BUILD

@@ -0,0 +1,40 @@
+load("//cc:defs.bzl", "cc_binary")
+load("//examples:experimental_cc_shared_library.bzl", "cc_shared_library")
+
+cc_shared_library(
+    name = "baz_so",
+    roots = ["//examples/test_cc_shared_library:a_suffix"],
+     permissions = [
+        "//examples/test_cc_shared_library:permissions",
+    ],
+)
+
+cc_shared_library(
+    name = "qux_so",
+    dynamic_deps = [":baz_so"],
+    roots = ["//examples/test_cc_shared_library:qux"],
+    permissions = [
+        "//examples/test_cc_shared_library:permissions",
+    ],
+)
+
+cc_shared_library(
+    name = "qux2_so",
+    dynamic_deps = [":baz_so"],
+    roots = ["//examples/test_cc_shared_library:qux2"],
+    permissions = [
+        "//examples/test_cc_shared_library:permissions",
+    ],
+)
+
+cc_binary(
+    name = "diamond_inheritance",
+    srcs = ["main.cc"],
+    dynamic_deps = [
+        ":qux_so",
+        ":qux2_so",
+    ],
+    deps = [
+        "//examples/test_cc_shared_library:a_suffix"
+    ]
+)

examples/test_cc_shared_library/diamond_inheritance/main.cc

@@ -0,0 +1,8 @@
+#include <iostream>
+
+#include "examples/test_cc_shared_library/a_suffix.h"
+
+int main() {
+  std::cout << "hello " << a_suffix() << std::endl;
+  return 0;
+}