armnoneeabi

Arm-none-eabi refers to a GNU toolchain target used to build software for ARM microcontrollers in a bare-metal (no operating system) environment. The name expands to ARM None EABI, indicating that the code runs on ARM cores without an OS and uses the ARM Embedded Application Binary Interface. The toolchain typically includes the GNU Compiler Collection (gcc/g++), assembler, linker, and binary utilities, often together with a C runtime such as newlib. Programs compiled for arm-none-eabi are produced as ELF executables suitable for loading into microcontroller flash memory; they generally do not use dynamic libraries or the standard Linux system calls.

The target supports a range of ARM cores, with emphasis on the Cortex-M family used in embedded devices, though it can target other ARM architectures as well. The EABI defines calling conventions, data types, and object formats, while the “none” portion signals the absence of a host operating system. Variants exist for different floating-point configurations, such as hard-float or soft-float ABIs, controlled by compiler options like -mfpu and -mfloat-abi. Linking typically relies on linker scripts to assign code and data to specific memory regions in the device.

Usage and ecosystem: arm-none-eabi is the standard cross-compilation target for bare-metal ARM development. It is widely used in firmware, embedded applications, and educational projects for microcontrollers. The GNU Arm Embedded Toolchain provides builds for multiple platforms (Windows, macOS, Linux), and the same target is supported by LLVM’s clang. Build systems and IDEs commonly specify arm-none-eabi as the cross-compilation target to produce self-contained, OS-independent binaries.