{examples,tests}/rust: Rust updates (-sys/-wrappers version, stable)

doc/doxygen/src/using-rust.md

@@ -84,10 +84,20 @@ Toolchain {#toolchain}
 
 To install the necessary Rust components, it is easiest use [**rustup**, installed as described on its website].
 
-Using Rust on RIOT requires a nightly version of Rust,
+Using most of Rust on RIOT requires a nightly version of Rust,
 because some transpiled expressions for RIOT make use of unstable features,
 and because the RIOT wrappers use some unstable idioms.
 
+@note
+Building on stable is supported for some examples and platforms starting with Rust 1.59
+(e.g., the rust-hello-world on any ARM Cortex, but not yet on native).
+Try it out by adding `CARGO_CHANNEL=stable` to the project's Makefile;
+where it doesn't work, rustc will complain that "`#![feature]` may not be used on the stable release channel".
+
+@note
+A stable version of Rust is not currently provided with the Docker images;
+consequently, builds on stable are not tested as regularly as builds on nightly.
+
 Make sure you have both the nightly **toolchain**
 and the core library for the CPU (**target**) of your choice available:
 

examples/rust-gcoap/Cargo.toml

@@ -9,7 +9,7 @@ resolver = "2"
 crate-type = ["staticlib"]
 
 [dependencies]
-riot-wrappers = { version = "^0.7", features = [ "with_coap_message", "with_coap_handler" ] }
+riot-wrappers = { version = "^0.7.18", features = [ "set_panic_handler", "panic_handler_format", "with_coap_message", "with_coap_handler" ] }
 
 coap-message-demos = { git = "https://gitlab.com/chrysn/coap-message-demos/", default-features = false }
 coap-handler-implementations = "0.3"

examples/rust-gcoap/Makefile

@@ -30,6 +30,11 @@ DEVELHELP ?= 1
 # Change this to 0 show compiler invocation lines by default:
 QUIET ?= 1
 
+# Add 3k extra stack: The Rust examples take more of it than gcoap expects,
+# presumably because the example use the standard library's sting formatting
+# instead of one of the more optimized formatters.
+CFLAGS += -DGCOAP_STACK_SIZE='(THREAD_STACKSIZE_DEFAULT+DEBUG_EXTRA_STACKSIZE+sizeof(coap_pkt_t)+1024)'
+
 # The name of crate (as per Cargo.toml package name, but with '-' replaced with '_')
 APPLICATION_RUST_MODULE = rust_gcoap
 BASELIBS += $(APPLICATION_RUST_MODULE).module

examples/rust-gcoap/Makefile.ci

@@ -1,11 +1,19 @@
 BOARD_INSUFFICIENT_MEMORY := \
+    airfy-beacon \
     blackpill \
     bluepill \
     bluepill-stm32f030c8 \
+    calliope-mini \
+    im880b \
     i-nucleo-lrwan1 \
+    microbit \
+    nrf51dongle \
+    nrf6310 \
     nucleo-f030r8 \
     nucleo-f031k6 \
     nucleo-f042k6 \
+    nucleo-f070rb \
+    nucleo-f072rb \
     nucleo-f302r8 \
     nucleo-f303k8 \
     nucleo-f334r8 \
@@ -22,4 +30,5 @@ BOARD_INSUFFICIENT_MEMORY := \
     stm32g0316-disco \
     stm32l0538-disco \
     stm32mp157c-dk2 \
+    yunjia-nrf51822 \
     #

examples/rust-hello-world/Cargo.toml

@@ -9,4 +9,5 @@ resolver = "2"
 crate-type = ["staticlib"]
 
 [dependencies]
-riot-wrappers = "0.7"
+# `default-features = false` can be removed with 0.8, and enables building on stable during the 0.7 series
+riot-wrappers = { version = "0.7", features = [ "set_panic_handler" ], default-features = false }

tests/rust_minimal/Cargo.toml

@@ -9,4 +9,5 @@ resolver = "2"
 crate-type = ["staticlib"]
 
 [dependencies]
-riot-wrappers = "0.7"
+# `default-features = false` can be removed with 0.8, and enables building on stable during the 0.7 series
+riot-wrappers = { version = "0.7", features = [ "set_panic_handler" ], default-features = false }