Lup Yuen Lee 李立源 @lupyuen@qoto.org

Compiling #RustLang Apps for QEMU #RISCV 32-bit and Apache #NuttX RTOS

Article: https://lupyuen.github.io/articles/rust4#appendix-build-nuttx-for-qemu

Adding Apache #NuttX RTOS to #RustLang 👍

Source: https://github.com/rust-lang/rust/pull/127755

64-bit #RISCV #RustLang Apps should be compiled for riscv64gc ... Here's the workaround for Apache #NuttX RTOS

Article: https://lupyuen.codeberg.page/articles/rust5.html#compile-for-qemu-64-bit-risc-v

Will #RustLang Apps run on a 64-bit #RISCV SBC ... Like #Ox64 BL808 SBC? Let's find out with Apache #NuttX RTOS

Article: https://lupyuen.codeberg.page/articles/rust5.html

64-bit #RISCV Linux support in #RustLang (riscv64gc-unknown-linux-gnu)

https://ferrous-systems.com/blog/improving-64-bit-risc-v-support/

64-bit #RISCV Linux support in #RustLang (riscv64gc-unknown-linux-gnu)

https://ferrous-systems.com/blog/improving-64-bit-risc-v-support/

Our #RustLang App compiles for Software Floating-Point, but Apache #NuttX RTOS expects Hardware Floating-Point ... Let's fix this with a Rust Custom Target for QEMU #RISCV

https://lupyuen.codeberg.page/articles/rust4.html

#RustLang Apps won't compile for Apache #NuttX RTOS on #Ox64 BL808 SBC ... Let's fix this in the next article! 👍

Article: https://lupyuen.codeberg.page/articles/rust4.html#rust-build-for-64-bit-risc-v

#RustLang Apps run OK on Apache #NuttX RTOS for QEMU ... After adding the Rust Custom Profile for Double-Float

Article: https://lupyuen.codeberg.page/articles/rust4.html#nuttx-links-ok-with-rust

Before using a #RustLang Custom Target, remember to rebuild the Rust Core Library

Article: https://lupyuen.codeberg.page/articles/rust4.html#build-the-rust-core-library

"Lately, I have been feeling like #RustLang (and llvm) is giving the middle finger to everything that’s not POSIX x86_64 running in a FAANG-scale cloud environment ... I suppose they are entitled to do that, given who funds their payroll"

https://www.crowdsupply.com/sutajio-kosagi/precursor/updates/xous-0-9-16-harmonization-and-encrypted-swap

Here's how we create a #RustLang Custom Target for #RISCV Double-Float: riscv32gc

Article: https://lupyuen.codeberg.page/articles/rust4.html#custom-target-for-rust

#RustLang won’t do Double-Float for 32-bit #RISCV ... Let's create a Custom Rust Target for #NuttX on QEMU

Article: https://lupyuen.codeberg.page/articles/rust4.html#rust-wont-double-float

GCC Linker won’t link the binaries: Hard-Float vs Soft-Float ... Here's how we fix the #RustLang binaries in Apache #NuttX RTOS

Article: https://lupyuen.codeberg.page/articles/rust4.html#software-vs-hardware-floating-point

Our #RustLang App compiles for Software Floating-Point, but Apache #NuttX RTOS expects Hardware Floating-Point ... Let's fix this with a Rust Custom Target for QEMU #RISCV

Source: https://lupyuen.codeberg.page/articles/rust4.html

Here's how we run #RustLang Apps on Apache #NuttX RTOS and QEMU #RISCV Emulator

https://lupyuen.codeberg.page/articles/rust3.html

Why we're doing #RustLang Apps for Apache #NuttX RTOS

Article: https://lupyuen.codeberg.page/articles/rust3.html#all-things-considered

Standard vs Embedded #RustLang ... Here's why we use Embedded Rust for Apache #NuttX RTOS

Article: https://lupyuen.codeberg.page/articles/rust3.html#standard-vs-embedded-rust

#RustLang core::panicking::panic is undefined ... Here's why it happens on Apache #NuttX RTOS

Article: https://lupyuen.codeberg.page/articles/rust3.html#panic-is-undefined

Watch how Apache #NuttX RTOS builds #RustLang Apps ... By calling `rustc`

Article: https://lupyuen.codeberg.page/articles/rust3.html#how-nuttx-compiles-rust-apps