Picolibc: A C Library for Smaller Systems

Explore a comprehensive overview of Picolibc, a C library designed for smaller systems, in this 40-minute conference talk by Keith Packard from Amazon. Delve into the unique considerations for embedded systems, developer first steps, and key components like newlib concerns, math code, and stdio. Examine example startup code, linker scripts, and testing procedures. Learn about recent developments in Picolibc, including practical demonstrations with hello.c and size comparisons for Cortex M3. Discover projects supporting Picolibc, such as RIOT, and gain insights into personal projects and future aspirations for this specialized library.

Intro
Small System Considerations
Embedded Libc Needs
Developer First Steps
newlib concerns
Math code
stdio
Thread Local Storage
Example Startup Code (crto)
Linker script
Testing
Test Status
Recent Picolibc Work
hello.c
Compiling
Size of hello.elf
Running on hardware
Running under qemu
Using the float printf code
Comparing sizes (cortex m3)
Blinky Lights!
Projects with picolibc support
RIOT
Personal Projects
Picolibc Aspirations