Libc++ on Linux - using the example of Oniro
summary
Oniro flips the default STL from libstdc++ to libc++ and builds with clang 14 and bitbake, enabling full LTO across the OS. The build boots immediately, performance is roughly equal with some containers faster (vector/list) and some slower (deque/string), and final binaries are consistently smaller. Qt/KDE Plasma compiles unchanged against libc++. Remaining work: catch up on a few C++20 features, offer size-vs-speed configured builds, a GCC-compatible libc++ shim, and a tiny libc++ subset for Zephyr-style MCUs.
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chapters (10)
- 0:00Introduction
- 0:42Why not Libc
- 2:45What is Oniro
- 3:25Why use Libc
- 4:22LTO
- 5:54Bitbake
- 7:13Performance
- 8:05Crossplatform
- 9:07Wishlist
- 11:11Outro
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