toku-mac opened a new pull request, #3494:
URL: https://github.com/apache/nuttx-apps/pull/3494
examples/rust: Fix CMake stack and priority config names
## Summary
This fixes the CMake configuration for the `hello_rust_cargo` example.
The CMake file was using `CONFIG_EXAMPLES_HELLO_STACKSIZE` and
`CONFIG_EXAMPLES_HELLO_PRIORITY`, but this application is configured by the
`CONFIG_EXAMPLES_HELLO_RUST_CARGO_*` symbols. The Makefile already uses the
Rust Cargo-specific symbols.
With this change, the CMake built-in application registration uses the
configured Rust Cargo example stack size and priority, matching the Makefile
behavior.
## Impact
When running on a target, it prevents "`malloc()` and other functions
failing and triggering assertions."
## Testing
I confirm that changes are verified on local setup and works as intended:
* Build Host(s): OS (macOS 26.5), CPU(Apple M1), compiler(ARM GCC 14.3.rel1)
* Target(s): arch(thumbv8m)
* Ensure your PATH environment variable is properly configured to allow
execution of: menuconfig, olddefconfig, savedefconfig, and setconfig.
* Use the Rust toolchain version prior to nightly-2026-04-29 to avoid errors
related to
lib/rustlib/src/rust/library/std/src/sys/net/connection/socket/unix.rs.
Configuration:
```
cd ~/nuttxspace/nuttx
source ../.venv/bin/activate
rm -rf build-debug
make distclean
# cmake --build build-default -t distcleanconfig
cmake -S . -B build-debug -DBOARD_CONFIG=nucleo-h563zi:nsh -GNinja
printf "CONFIG_SYSTEM_TIME64=y
CONFIG_FS_LARGEFILE=y
CONFIG_TLS_NELEM=16
CONFIG_DEV_URANDOM=y
CONFIG_EXAMPLES_HELLO_RUST_CARGO=y
CONFIG_EXAMPLES_HELLO_RUST_CARGO_STACKSIZE=8192
" >> build-debug/.config
cmake --build build-debug -t olddefconfig
```
Build:
```
cmake --build build-debug
[0/2] Re-checking globbed directories...
[1/2] Re-running CMake...
-- NuttX Host Tools
-- CMake C compiler: AppleClang
-- CMake system name: Darwin
-- CMake host system processor: arm64
TOOLS_DIR path is "/Users/toku/nuttxspace/nuttx"
HOST = Darwin
-- Configuring done (0.1s)
-- Generating done (0.3s)
-- Build files have been written to:
/Users/toku/nuttxspace/nuttx/build-debug/bin_host
-- nuttx_add_subdirectory: Skipping cxx-oot-build
-- Configuring done (3.1s)
-- Generating done (0.7s)
-- Build files have been written to: /Users/toku/nuttxspace/nuttx/build-debug
[0/4] Re-checking globbed directories...
[1155/1161] Building Rust crate hello
Compiling compiler_builtins v0.1.160
(/Users/toku/.rustup/toolchains/nightly-2026-04-29-aarch64-apple-darwin/lib/rustlib/src/rust/library/compiler-builtins/compiler-builtins)
Compiling core v0.0.0
(/Users/toku/.rustup/toolchains/nightly-2026-04-29-aarch64-apple-darwin/lib/rustlib/src/rust/library/core)
Compiling libc v0.2.185
Compiling object v0.37.3
Compiling std v0.0.0
(/Users/toku/.rustup/toolchains/nightly-2026-04-29-aarch64-apple-darwin/lib/rustlib/src/rust/library/std)
Compiling proc-macro2 v1.0.106
Compiling quote v1.0.45
Compiling unicode-ident v1.0.24
Compiling serde_core v1.0.228
Compiling zmij v1.0.21
Compiling serde_json v1.0.149
Compiling serde v1.0.228
Compiling syn v2.0.117
Compiling rustc-std-workspace-core v1.99.0
(/Users/toku/.rustup/toolchains/nightly-2026-04-29-aarch64-apple-darwin/lib/rustlib/src/rust/library/rustc-std-workspace-core)
Compiling alloc v0.0.0
(/Users/toku/.rustup/toolchains/nightly-2026-04-29-aarch64-apple-darwin/lib/rustlib/src/rust/library/alloc)
Compiling adler2 v2.0.1
Compiling memchr v2.7.6
Compiling panic_abort v0.0.0
(/Users/toku/.rustup/toolchains/nightly-2026-04-29-aarch64-apple-darwin/lib/rustlib/src/rust/library/panic_abort)
Compiling cfg-if v1.0.4
Compiling rustc-demangle v0.1.27
Compiling rustc-literal-escaper v0.0.7
Compiling unwind v0.0.0
(/Users/toku/.rustup/toolchains/nightly-2026-04-29-aarch64-apple-darwin/lib/rustlib/src/rust/library/unwind)
Compiling serde_derive v1.0.228
Compiling rustc-std-workspace-alloc v1.99.0
(/Users/toku/.rustup/toolchains/nightly-2026-04-29-aarch64-apple-darwin/lib/rustlib/src/rust/library/rustc-std-workspace-alloc)
Compiling panic_unwind v0.0.0
(/Users/toku/.rustup/toolchains/nightly-2026-04-29-aarch64-apple-darwin/lib/rustlib/src/rust/library/panic_unwind)
Compiling gimli v0.32.3
Compiling hashbrown v0.17.0
Compiling std_detect v0.1.5
(/Users/toku/.rustup/toolchains/nightly-2026-04-29-aarch64-apple-darwin/lib/rustlib/src/rust/library/std_detect)
Compiling miniz_oxide v0.8.9
Compiling addr2line v0.25.1
Compiling proc_macro v0.0.0
(/Users/toku/.rustup/toolchains/nightly-2026-04-29-aarch64-apple-darwin/lib/rustlib/src/rust/library/proc_macro)
Compiling pin-project-lite v0.2.17
Compiling memchr v2.8.0
Compiling itoa v1.0.18
Compiling tokio v1.52.3
Compiling hello v0.1.0 (/Users/toku/nuttxspace/apps/examples/rust/hello)
Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.43s
[1156/1161] Linking CXX executable nuttx
/Applications/ArmGNUToolchain/14.3.rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/14.3.1/../../../../arm-none-eabi/bin/ld:
warning: umm_mallinfo.c.o: missing .note.GNU-stack section implies executable
stack
/Applications/ArmGNUToolchain/14.3.rel1/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/14.3.1/../../../../arm-none-eabi/bin/ld:
NOTE: This behaviour is deprecated and will be removed in a future version of
the linker
Memory region Used Size Region Size %age Used
flash: 1267092 B 2 MB 60.42%
sram: 11560 B 256 KB 4.41%
[1158/1161] Generating System.map
```
Testing logs before change:
* Running `hello_rust_cargo` may sometimes cause assertion failures.
Testing logs after change:
* Improves stability of operation.
```
nsh> help
help usage: help [-v] [<cmd>]
. cp expr mount kill uname
[ cmp false mv pkill umount
? dirname fdinfo pidof sleep unset
alias df free printf usleep uptime
unalias dmesg help ps source watch
basename echo hexdump pwd test xd
break env ls rm time wait
cat exec mkdir rmdir true
cd exit mkrd set truncate
Builtin Apps:
dd nsh sh
hello_rust_cargo
nsh>
nsh> uname -a
NuttX 12.13.0 a50614512c May 22 2026 09:27:10 arm nucleo-h563zi
nsh>
nsh> hello_rust_cargo
{"name":"John","age":30}
{"name":"Jane","age":25}
Deserialized: Alice is 28 years old
Pretty JSON:
{
"name": "Alice",
"age": 28
}
Hello world from tokio!
```
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