6 The libc is not complete. If you need a fully functioning C library right
7 now, you should continue to use your standard system libraries.
12 The libc aspires to a unique place in the software ecosystem. The goals are:
14 - Fully compliant with current C standards (C17 and upcoming C2x) and POSIX.
15 - Easily decomposed and embedded: Supplement or replace system C library
16 functionality easily. This is useful to get consistent math precision across
17 systems, or updated memory operations for newer microarchitectures. These
18 pieces will work on Linux, MacOS, Windows, and Fuchsia.
19 - The creation of fully static binaries without license implications.
20 - Increase whole program optimization opportunities for static binaries through
21 ability to inline math and memory operations.
22 - Reduce coding errors by coding in modern C++ through the use of lightweight
23 containers during coding that can be optimized away at runtime.
24 - Permit fuzzing and sanitizer instrumentation of user binaries including the
26 - A complete testsuite that tests both the public interface and internal
30 .. __: https://github.com/llvm/llvm-project/tree/main/libc/fuzzing
35 Most development is currently targeting x86_64 and aarch64 on Linux. Several
36 functions in the libc have been tested on Windows. The Fuchsia platform is
37 slowly replacing functions from its bundled libc with functions from this
43 The libc is written to be ABI independent. Interfaces are generated using
44 LLVM's tablegen, so supporting arbitrary ABIs is possible. In it's initial
45 stages there is no ABI stability in any form.
81 :caption: External Links
83 Source Code <https://github.com/llvm/llvm-project/tree/main/libc>
84 Bug Reports <https://github.com/llvm/llvm-project/labels/libc>
85 Discourse <https://discourse.llvm.org/c/runtimes/libc>
86 Join the Discord <https://discord.gg/xS7Z362>
87 Discord Channel <https://discord.com/channels/636084430946959380/636732994891284500>
88 Buildbot <https://lab.llvm.org/buildbot/#/builders?tags=libc>