Bare-C Cross-compiler system (BCC)

• GNU/LLVM C/C++ Compiler with binutils
• Small bare-C runtime with interrupt support
• NewLib C library
• Open source

RTEMS Cross-compiler system (RCC)

• GNU/LLVM C/C++ Compiler with binutils
• RTEMS real-time kernel 5, 4.10 or 4.8
• Wide range of device drivers
• Open source

VxWorks 7 SPARC architectural port and BSP

• Supports LEON2, LEON3 and LEON4
• Wide range of device drivers
• Windows and Linux host

VxWorks 6.9 SPARC architectural port and BSP

• Supports LEON2, LEON3 and LEON4
• Wide range of device drivers
• Windows and Linux host

Linux for LEON

• Supports MMU, FPU, V8 and SMP systems
• LINUXBUILD build environment for LEON3/4/5
• Wide range of applications
• Many device drivers: PCI, Network, USB, etc.

Zephyr RTOS

• RTOS with a tiny footprint
• GNU C/C++ compiler for Linux hosts by Zephyr SDK
• GRLIB device drivers
• Open source (Apache 2.0 license)