Using Picolibc in Embedded Systems
summary
Picolibc claims a standards‑conformant C17/POSIX subset with integrated emulator testing and toolchain integrations (Cross Tool NG, Zephyr SDK), reports a released build Picolibc 1.8.6, and targets very small systems down to 32k of ROM. Specifics: a surprising 384-byte ctype table was reduced, SuperH and 68k targets are added and exercised, AVR and LLVM toolchains are supported, multiply‑accumulate is emulated in software with correct rounding, printf/scanf are configurable for size vs features, and Picolibc is now the default in Zephyr.
AI-written summary · about
chapters (12)
- 0:00Picolibc introduction
- 1:46Design goals and safety
- 5:18Features and versioning
- 7:24Diverse embedded support
- 10:14Math library optimizations
- 13:04Build-time configuration
- 16:38Localization support
- 22:34Ctype implementation
- 27:32Floating point handling
- 33:41Standard I/O solutions
- 37:57Zephyr RTOS integration
- 40:44Q&A and future plans
related talks
47mUsing Picolibc in Embedded Systems
40mPicolibc: A C Library for Smaller Systems
42mpicolibc: a C library for small 32-bit systems
32mOpen Source C/C++ Embedded Toolchains Using LLVM
45mFil-C: memory safety with fanatical C/C++ compatibility
53mOptimizing C for Microcontrollers - Best Practices
36muClibc Today: Still Makes Sense
01h 00mDealing with Embedded Limitations