ANDROID: Add bionic-compat.h to kselftests.

Bionic does not provide pthread_cancel(). Copy bionic-compat.h from
previous fork of kselftests to here to solve the issue.

Link: https://android.googlesource.com/platform/external/linux-kselftest/+/refs/heads/main/android/include/bionic-compat.h
Bug: 369330443
Change-Id: Ifa1b5cbe55d6e8ab007787d94e31902ed8dfc37c
Signed-off-by: HONG Yifan <elsk@google.com>
Signed-off-by: Edward Liaw <edliaw@google.com>

BUILD.bazel

@@ -1295,6 +1295,12 @@ _KSELFTEST_COPTS = [
     "-O3",
     "-pthread",
     "-std=gnu99",
+    "-include",
+    paths.join(
+        package_relative_label(":x").workspace_root,
+        package_relative_label(":x").package,
+        "tools/testing/selftests/android/include/bionic-compat.h",
+    ),
 ] + select({
     ":arm": ["-mcpu=cortex-a8"],
     "//conditions:default": [],
@@ -1326,7 +1332,9 @@ config_setting(
 
 cc_library(
     name = "kselftest_headers_lib",
-    hdrs = glob(["tools/testing/selftests/*.h"]),
+    hdrs = glob(["tools/testing/selftests/*.h"]) + [
+        "tools/testing/selftests/android/include/bionic-compat.h",
+    ],
     copts = _KSELFTEST_COPTS,
     defines = [
         "_GNU_SOURCE=",
@@ -1398,6 +1406,9 @@ cc_library(
     ],
     copts = _KSELFTEST_COPTS,
     visibility = ["//visibility:private"],
+    deps = [
+        ":kselftest_headers_lib",
+    ],
 )
 
 cc_binary_with_abi(
@@ -1408,7 +1419,6 @@ cc_binary_with_abi(
     target_compatible_with = ["@platforms//os:android"],
     visibility = ["//visibility:private"],
     deps = [
-        ":kselftest_headers_lib",
         ":kselftest_vdso",
     ],
 )
@@ -1421,7 +1431,6 @@ cc_binary_with_abi(
     target_compatible_with = ["@platforms//os:android"],
     visibility = ["//visibility:private"],
     deps = [
-        ":kselftest_headers_lib",
         ":kselftest_vdso",
     ],
 )
@@ -1434,7 +1443,6 @@ cc_binary_with_abi(
     target_compatible_with = ["@platforms//os:android"],
     visibility = ["//visibility:private"],
     deps = [
-        ":kselftest_headers_lib",
         ":kselftest_vdso",
     ],
 )
@@ -1447,7 +1455,6 @@ cc_binary_with_abi(
     target_compatible_with = ["@platforms//os:android"],
     visibility = ["//visibility:private"],
     deps = [
-        ":kselftest_headers_lib",
         ":kselftest_vdso",
     ],
 )

tools/testing/selftests/android/include/bionic-compat.h

@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __BIONIC_COMPAT_H
+#define __BIONIC_COMPAT_H
+
+#define _GNU_SOURCE
+#include <sys/types.h>
+
+static inline int pthread_cancel(pthread_t thread)
+{
+	return 0;
+}
+
+#endif /* __BIONIC_COMPAT_H */