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https://github.com/kassane/nuttx-dlang-app
D Apps for Apache NuttX RTOS and QEMU RISC-V
https://github.com/kassane/nuttx-dlang-app
d dlang nuttx nuttx-apps qemu riscv
Last synced: 3 months ago
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D Apps for Apache NuttX RTOS and QEMU RISC-V
- Host: GitHub
- URL: https://github.com/kassane/nuttx-dlang-app
- Owner: kassane
- License: apache-2.0
- Created: 2024-06-04T12:44:30.000Z (7 months ago)
- Default Branch: main
- Last Pushed: 2024-06-08T16:37:00.000Z (7 months ago)
- Last Synced: 2024-06-08T20:35:58.362Z (7 months ago)
- Topics: d, dlang, nuttx, nuttx-apps, qemu, riscv
- Language: D
- Homepage:
- Size: 24.4 KB
- Stars: 6
- Watchers: 1
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# D Apps for Apache NuttX RTOS and QEMU RISC-V
### upstream PR: https://github.com/apache/nuttx/pull/12457 [**MERGED**]
Inspired in [Rust Apps for Apache NuttX RTOS and QEMU RISC-V](https://github.com/lupyuen/nuttx-rust-app) by [Lup Yuen Lee](https://github.com/lupyuen).
Read https://lupyuen.github.io/articles/rust3
## How to work
- **Get nuttx and nuttx-apps**
```bash
git clone --depth=1 --recursive https://github.com/apache/nuttx -b nuttx-12.5.1
git clone --depth=1 --recursive https://github.com/apache/nuttx-apps -b nuttx-12.5.1 apps
# optional (kconfig-frontends) build or use your distro pkg-manager
git clone --depth=1 https://bitbucket.org/nuttx/tools.git
```
- **apply patches**
- **build nuttx**
- **Output**
```bash
qemu-system-riscv32 \
-semihosting \
-M virt,aclint=on \
-cpu rv32 -smp 8 \
-bios none \
-kernel nuttx -nographic
nsh> hello_d
Hello World, [generic-rv32]!
hello_d_main: Saying hello from the dynamically constructed instance
DHelloWorld.HelloWorld: CONSTRUCTION FAILED!
hello_d_main: Saying hello from the instance constructed on the stack
DHelloWorld.HelloWorld: Hello, World!!
```
## Notes
During some tests you may discover druntime (if used) and the compiler builtin require libunwind.
There are some common errors to work around (not just in rv32/64).
- need `static` keyword (TLS) - use `--emulated-tls`.
- like C/C++ custom `#ifdef/ifndef FOO` (`-DFOO=1`) to `Version(Foo)` (`--d-version=Foo`)
- verbose/tips keywords:
- `-vgc`: list all gc allocations including hidden ones (if use DRT/GC alloc)
- `-vtls`: list all variables going into TLS (thread local storage)
- `-verrors=context`: show error messages with the context of the erroring source line (show LoC error)
```diff
--- a/examples/hello_d/Makefile
+++ b/examples/hello_d/Makefile
@@ -26,7 +26,10 @@ MAINSRC = hello_d_main.d
# hello_d built-in application info
-DFLAGS += -oq -betterC
+DFLAGS += -oq -betterC -vtls --emulated-tls
+DFLAGS += -verrors=context -O
+DFLAGS += --d-version=NuttX_D_Initialize
```
### NuttX dlang-app supports betterC mode only?
Official DRT(D runtime) isn't ideal for embedded (particularly microcontrollers). However, it's possible make your own mini/tiny DRT, like:
- https://github.com/KitsunebiGames/tinyd-rt (used on [D_on_Dreamcast](https://dreamcast.wiki/D_on_Dreamcast))
- [How to work custom Druntime - by Adam D. Ruppe](http://dpldocs.info/this-week-in-d/Blog.Posted_2020_08_10.html#druntime) - [my fork updated](https://github.com/kassane/wasmd)