README.md
1# WASI libc "top half".
2
3The WASI libc "top half" is conceptually the upper half of a traditional libc
4implementation, consisting of C standard library and other relatively
5higher-level functionality.
6
7Code in the musl directory is based on musl revision
8040c1d16b468c50c04fc94edff521f1637708328, which is v1.2.0, from
9git://git.musl-libc.org/musl.
10
11Whole files which are unused are omitted. Changes to upstream code are wrapped
12in preprocessor directives controlled by the macro `__wasilibc_unmodified_upstream`.
13
14Some major known missing areas include:
15 - threads
16 - aio
17 - setjmp
18 - signals
19 - ipc
20 - termios
21 - nss
22 - timezones
23 - non-builtin locales
24 - TIOCGWINSZ (because cloudabi lacks it; affects isatty, line buffering for stdout)
25 - O\_CLOEXEC, O\_NOCTTY (because cloudabi lacks them)
26