dist/tools/coccinelle: add patch to fix asserts with side-effects

dist/tools/coccinelle/force/assert_no_function_call.cocci

@@ -0,0 +1,93 @@
+// One might be tempted to write `assert(do_something() == 0);` if one expects
+// that `do_something()` does succeed and wants to panic if not. However, with
+// `-DNDEBUG` both the check of the return value but also the function call get
+// optimized out.
+//
+// Something like `assert(self_test() == 0);` does make sense if and only if
+// `self_test()` is a pure (as in `__attribute__((pure))`) function. We can
+// exclude pure functions from this list, as not too many different pure
+// functions end up in an `assert()` anyway.
+//
+// SPDX-FileCopyrightText: 2026 ML!PA Consulting GmbH
+// SPDX-License-Identifier: LGPL-2.1-only
+// Confidence: Moderate
+// Options:
+
+@@
+identifier f != {
+	ARRAY_SIZE,
+	atomic_load_kernel_pid,
+	bitarithm_bits_set,
+	block_get_enc_msg_len,
+	clist_count,
+	CMU_ClockFreqGet,
+	dev,
+	DEV,
+	_does_handle_ack,
+	dtls_get_app_data,
+	_get_nud_state,
+	__get_PRIMASK,
+	gnrc_pktbuf_contains,
+	gnrc_sixlowpan_frag_rb_entry_empty,
+	_gpio_init_mode_check,
+	gpio_is_equal,
+	gpio_is_valid,
+	GPIO_PORT_PIN_NUMOF,
+	gpio_port_unpack_addr,
+	HAS_ALIGNMENT_OF,
+	ieee802154_radio_has_irq_ack_timeout,
+	ipv6_addr_is_link_local,
+	ipv6_hdr_is,
+	irq_is_in,
+	IS_ACTIVE,
+	is_gpio_port_num_valid,
+	_is_set,
+	IS_USED,
+	KHZ,
+	kw41zrf_is_dsm,
+	MHZ,
+	msg_bus_get_sender_pid,
+	msp430_auxiliary_clock_freq,
+	netif_iter,
+	_nib_onl_get_if,
+	PARAMS,
+	pid_is_valid,
+	PWM_DEV,
+	sixlowpan_sfr_is,
+	soft_spi_bus_is_valid,
+	soft_spi_mode_is_valid,
+	SPI_DEV,
+	strcmp,
+	strncmp,
+	thread_getpid,
+	unicoap_message_is_request,
+	_valid_offset,
+	ztimer_is_set
+};
+expression list args;
+expression value;
+@@
+
+(
+- assert(f(args) == value);
++ /* TODO: replace C23 typeof() with type by hand for portability */
++ typeof(f(args)) tmp = f(args);
++ (void)tmp;
++ assert(tmp == value);
+|
+- assert(value == f(args));
++ /* TODO: replace C23 typeof() with type by hand for portability */
++ typeof(f(args)) tmp = f(args);
++ (void)tmp;
++ assert(tmp == value);
+|
+- assert(f(args));
++ bool tmp = f(args);
++ (void)tmp;
++ assert(tmp);
+|
+- assert(!f(args));
++ bool tmp = f(args);
++ (void)tmp;
++ assert(!tmp);
+)