Merge #17735 #19182 #19184

17735: examples/gcoap_dtls: Increase stack size r=maribu a=maribu

### Contribution description

As the title says. The stack size was copied over from `tests/pkg_tinydtls_sock_async` cargo-cult style. Also some typos in the README were fixed.

### Testing procedure

Previously on my Nucleo-F767ZI, the CoAP client triggered the MPU stack guard on sending the DTLS hello. With this, the board no longer crashes.

### Issues/PRs references

None

19182: pkg/libfixmath: bump version r=maribu a=benpicco



19184: pkg/tinydtls: bump version r=maribu a=benpicco



Co-authored-by: Marian Buschsieweke <marian.buschsieweke@ovgu.de>
Co-authored-by: Benjamin Valentin <benjamin.valentin@ml-pa.com>

core/lib/init.c

@@ -60,7 +60,12 @@ static void *main_trampoline(void *arg)
         LOG_INFO(CONFIG_BOOT_MSG_STRING "\n");
     }
 
-    main();
+    int res = main();
+
+    if (IS_USED(MODULE_TEST_UTILS_MAIN_EXIT_CB)) {
+        void test_utils_main_exit_cb(int res);
+        test_utils_main_exit_cb(res);
+    }
 
 #ifdef MODULE_TEST_UTILS_PRINT_STACK_USAGE
     void print_stack_usage_metric(const char *name, void *stack, unsigned max_size);

examples/gcoap_dtls/Makefile

@@ -108,3 +108,4 @@ ifndef CONFIG_KCONFIG_MODULE_GCOAP
 GCOAP_RESEND_BUFS_MAX ?= 2
 CFLAGS += -DCONFIG_GCOAP_RESEND_BUFS_MAX=$(GCOAP_RESEND_BUFS_MAX)
 endif
+CFLAGS += -DTHREAD_STACKSIZE_MAIN=\(2*THREAD_STACKSIZE_LARGE\)

examples/gcoap_dtls/README.md

@@ -2,13 +2,13 @@
 
 This is an additional gcoap example, but with enabled DTLS. It only provides a
 custom configured makefile, while the code is a symlink to the original gcoap
-example. Therefore, the infos and usage notes of the other README also applies to this
-example.
+example. Therefore, the infos and usage notes of the other README also applies
+to this example.
 
-Please note, that with DTLS the default port is 5684 and not 5683, thus CoAP requests
-must be sent to this port.
+Please note, that with DTLS the default port is 5684 and not 5683, thus CoAP
+requests must be sent to this port.
 
-Since DTLS has higher memory and and ROM requirements, more boards are blacklisted
+Since DTLS has higher memory and ROM requirements, more boards are blacklisted
 for this example compared to the non-DTLS gcoap example.
 
 ### CoAP query with DTLS enabled

makefiles/pseudomodules.inc.mk

@@ -581,6 +581,7 @@ PSEUDOMODULES += crypto_aes_unroll
 
 # declare shell version of test_utils_interactive_sync
 PSEUDOMODULES += test_utils_interactive_sync_shell
+PSEUDOMODULES += test_utils_main_exit_cb
 
 # All auto_init modules are pseudomodules
 PSEUDOMODULES += auto_init_%

pkg/libfixmath/Makefile

@@ -1,5 +1,5 @@
 PKG_NAME     := libfixmath
-PKG_VERSION  := 24488b16cc0359daada0682a9bd3a11a801d0a01
+PKG_VERSION  := b987044c73dcaba496bb5bc86e69d134cd8790ec
 PKG_URL      := https://github.com/PetteriAimonen/libfixmath
 PKG_LICENSE  := MIT
 
@@ -9,4 +9,4 @@ all: $(filter libfixmath-unittests,$(USEMODULE))
 	$(QQ)"$(MAKE)" -C $(PKG_SOURCE_DIR)/$(PKG_NAME) -f $(CURDIR)/Makefile.$(PKG_NAME)
 
 libfixmath-unittests:
-	$(QQ)"$(MAKE)" -C $(PKG_SOURCE_DIR)/unittests -f $(CURDIR)/Makefile.$(PKG_NAME)-unittests
+	$(QQ)"$(MAKE)" -C $(PKG_SOURCE_DIR)/tests -f $(CURDIR)/Makefile.$(PKG_NAME)-unittests

pkg/libfixmath/Makefile.include

@@ -14,5 +14,6 @@ CFLAGS += $(libfixmath_options:CONFIG_FIXMATH_%=-DFIXMATH_%)
 INCLUDES += -I$(PKG_SOURCE_DIR)/libfixmath
 
 ifneq (,$(filter libfixmath-unittests,$(USEMODULE)))
-  INCLUDES += -I$(PKG_SOURCE_DIR)/unittests
+  INCLUDES += -I$(PKG_SOURCE_DIR)
+  INCLUDES += -I$(PKG_SOURCE_DIR)/tests
 endif