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musl - an implementation of the standard library for Linux-based systems
6d1a3dfeaf
the comparison f->wpos > f->buf has undefined behavior when f->wpos is a null pointer, despite the intuition (and actual compiler behavior, for all known compilers) being that NULL > ptr is false for all valid pointers ptr. the purpose of the comparison is to determine if the write buffer is non-empty, and the idiom used elsewhere for that is comparison against f->wbase, which is either a null pointer when not writing, or equal to f->buf when writing. in the former case, both f->wpos and f->wbase are null; in the latter they are both non-null and point into the same array. |
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musl libc
musl, pronounced like the word "mussel", is an MIT-licensed
implementation of the standard C library targetting the Linux syscall
API, suitable for use in a wide range of deployment environments. musl
offers efficient static and dynamic linking support, lightweight code
and low runtime overhead, strong fail-safe guarantees under correct
usage, and correctness in the sense of standards conformance and
safety. musl is built on the principle that these goals are best
achieved through simple code that is easy to understand and maintain.
The 1.1 release series for musl features coverage for all interfaces
defined in ISO C99 and POSIX 2008 base, along with a number of
non-standardized interfaces for compatibility with Linux, BSD, and
glibc functionality.
For basic installation instructions, see the included INSTALL file.
Information on full musl-targeted compiler toolchains, system
bootstrapping, and Linux distributions built on musl can be found on
the project website:
http://www.musl-libc.org/