test: Add imports for util bpf_cflags

This is required for the next commit.

test/functional/interface_usdt_coinselection.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2022 The Bitcoin Core developers
+# Copyright (c) 2022-present The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -17,6 +17,7 @@ from test_framework.util import (
     assert_equal,
     assert_greater_than,
     assert_raises_rpc_error,
+    bpf_cflags,
 )
 
 coinselection_tracepoints_program = """

test/functional/interface_usdt_mempool.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2022 The Bitcoin Core developers
+# Copyright (c) 2022-present The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -20,7 +20,10 @@ from test_framework.blocktools import COINBASE_MATURITY
 from test_framework.messages import COIN, DEFAULT_MEMPOOL_EXPIRY_HOURS
 from test_framework.p2p import P2PDataStore
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal
+from test_framework.util import (
+    assert_equal,
+    bpf_cflags,
+)
 from test_framework.wallet import MiniWallet
 
 MEMPOOL_TRACEPOINTS_PROGRAM = """

test/functional/interface_usdt_net.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2022 The Bitcoin Core developers
+# Copyright (c) 2022-present The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -17,7 +17,11 @@ except ImportError:
 from test_framework.messages import CBlockHeader, MAX_HEADERS_RESULTS, msg_headers, msg_version
 from test_framework.p2p import P2PInterface
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal, assert_greater_than
+from test_framework.util import (
+    assert_equal,
+    assert_greater_than,
+    bpf_cflags,
+)
 
 # Tor v3 addresses are 62 chars + 6 chars for the port (':12345').
 MAX_PEER_ADDR_LENGTH = 68

test/functional/interface_usdt_utxocache.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2022 The Bitcoin Core developers
+# Copyright (c) 2022-present The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -15,7 +15,10 @@ except ImportError:
     pass
 from test_framework.messages import COIN
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal
+from test_framework.util import (
+    assert_equal,
+    bpf_cflags,
+)
 from test_framework.wallet import MiniWallet
 
 utxocache_changes_program = """

test/functional/interface_usdt_validation.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (c) 2022 The Bitcoin Core developers
+# Copyright (c) 2022-present The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -18,8 +18,10 @@ except ImportError:
 
 from test_framework.address import ADDRESS_BCRT1_UNSPENDABLE
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal
-
+from test_framework.util import (
+    assert_equal,
+    bpf_cflags,
+)
 
 validation_blockconnected_program = """
 #include <uapi/linux/ptrace.h>

test/functional/test_framework/util.py

@@ -321,6 +321,13 @@ def wait_until_helper_internal(predicate, *, timeout=60, lock=None, timeout_fact
     raise AssertionError("Predicate {} not true after {} seconds".format(predicate_source, timeout))
 
 
+def bpf_cflags():
+    return [
+        "-Wno-error=implicit-function-declaration",
+        "-Wno-duplicate-decl-specifier",  # https://github.com/bitcoin/bitcoin/issues/32322
+    ]
+
+
 def sha256sum_file(filename):
     h = hashlib.sha256()
     with open(filename, 'rb') as f: