forked from OSchip/llvm-project
88 lines
2.4 KiB
ReStructuredText
88 lines
2.4 KiB
ReStructuredText
==================
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The LLVM C Library
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==================
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.. warning::
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The libc is not complete. If you need a fully functioning C library right
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now, you should continue to use your standard system libraries.
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Introduction
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============
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The libc aspires to a unique place in the software ecosystem. The goals are:
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- Fully compliant with current C standards (C17 and upcoming C2x) and POSIX.
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- Easily decomposed and embedded: Supplement or replace system C library
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functionality easily. This is useful to get consistent math precision across
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systems, or updated memory operations for newer microarchitectures. These
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pieces will work on Linux, MacOS, Windows, and Fuchsia.
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- The creation of fully static binaries without license implications.
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- Increase whole program optimization opportunities for static binaries through
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ability to inline math and memory operations.
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- Reduce coding errors by coding in modern C++ through the use of lightweight
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containers during coding that can be optimized away at runtime.
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- Permit fuzzing and sanitizer instrumentation of user binaries including the
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libc functions.
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- A complete testsuite that tests both the public interface and internal
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algorithms.
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- `Fuzzing`__
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.. __: https://github.com/llvm/llvm-project/tree/main/libc/fuzzing
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Platform Support
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================
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Most development is currently targeting x86_64 and aarch64 on Linux. Several
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functions in the libc have been tested on Windows. The Fuchsia platform is
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slowly replacing functions from its bundled libc with functions from this
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project.
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ABI Compatibility
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=================
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The libc is written to be ABI independent. Interfaces are generated using
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LLVM's tablegen, so supporting arbitrary ABIs is possible. In it's initial
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stages there is no ABI stability in any form.
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.. toctree::
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:hidden:
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:maxdepth: 1
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:caption: Using
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runtimes_build
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.. toctree::
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:hidden:
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:maxdepth: 1
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:caption: Status
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strings
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stdio
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math
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.. toctree::
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:hidden:
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:maxdepth: 1
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:caption: Development
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build_system
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clang_tidy_checks
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entrypoints
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fuzzing
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ground_truth_specification
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header_generation
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implementation_standard
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api_test
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layering
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mechanics_of_public_api
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redirectors
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source_layout
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.. toctree::
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:hidden:
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:maxdepth: 1
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:caption: External Links
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Source Code <https://github.com/llvm/llvm-project/tree/main/libc>
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Bug Reports <https://github.com/llvm/llvm-project/labels/libc>
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