cosmopolitan/libc
Justine Tunney 3e4fd4b0ad Add epoll and do more release readiness changes
This change also pays off some of the remaining technical debt with
stdio, file descriptors, and memory managemnt polyfills.
2020-11-28 12:01:51 -08:00
..
alg Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
bits Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
calls Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
conv Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
crt Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
crypto Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
dns Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
elf Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
fmt Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
integral Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
intrin Make terminal ui binaries work well everywhere 2020-10-19 06:38:31 -07:00
isystem Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
linux Make terminal ui binaries work well everywhere 2020-10-19 06:38:31 -07:00
log Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
math Get address sanitizer mostly working 2020-09-03 05:44:37 -07:00
mem Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
nexgen32e Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
nt Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
ohmyplus Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
rand Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
runtime Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
sock Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
stdio Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
str Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
stubs Add minor improvements and cleanup 2020-10-27 03:39:46 -07:00
sysv Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
testlib Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
time Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
tinymath Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
unicode Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
x Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
zipos Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
README.md Add x86_64-linux-gnu emulator 2020-08-25 04:43:42 -07:00
assert.h Initial import 2020-06-15 07:18:57 -07:00
complex.h Add x86_64-linux-gnu emulator 2020-08-25 04:43:42 -07:00
dce.h Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
disclaimer.inc Initial import 2020-06-15 07:18:57 -07:00
errno.h Add minor improvements and cleanup 2020-10-27 03:39:46 -07:00
inttypes.h Initial import 2020-06-15 07:18:57 -07:00
libc.mk Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
limits.h Add x86_64-linux-gnu emulator 2020-08-25 04:43:42 -07:00
literal.h Initial import 2020-06-15 07:18:57 -07:00
mach.h Initial import 2020-06-15 07:18:57 -07:00
macho.internal.h Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
macros-cpp.inc Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
macros.h Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
macros.inc Get Cosmopolitan into releasable state 2020-11-25 08:19:00 -08:00
math.h Make improvements 2020-09-14 00:02:34 -07:00
notice.inc Add scouts honor escape hatch for source embedding 2020-06-15 19:01:28 -07:00
notice.internal.h Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
paths.h Initial import 2020-06-15 07:18:57 -07:00
zip.h Add fixes performance and static web server 2020-10-05 23:11:49 -07:00

README.md

SYNOPSIS

Cosmopolitan Standard Library.

OVERVIEW

This directory defines static archives defining functions, like printf(), mmap(), win32, etc. Please note that the Cosmopolitan build configuration doesn't link any C/C++ library dependencies by default, so you still have the flexibility to choose the one provided by your system. If you'd prefer Cosmopolitan, just add (LIBC) and (CRT) to your linker arguments.

Your library is compromised of many bite-sized static archives. We use the checkdeps tool to guarantee that the contents of the archives are organized in a logical way that's easy to use with or without our makefile infrastructure, since there's no cyclic dependencies.

The Cosmopolitan Library exports only the most stable canonical system calls for all supported operating systems, regardless of which platform is used for compilation. We polyfill many of the APIs, e.g. read(), write() so they work consistently everywhere while other apis, e.g. CreateWindowEx(), might only work on one platform, in which case they become no-op functions on others.

Cosmopolitan polyfill wrappers will usually use the dollar sign naming convention, so they may be bypassed when necessary. This same convention is used when multiple implementations of string library and other performance-critical function are provided to allow Cosmopolitan to go fast on both old and newer computers.

We take an approach to configuration that relies heavily on the compiler's dead code elimination pass (libc/dce.h). Most of the code is written so that, for example, folks not wanting support for OpenBSD can flip a bit in SUPPORT_VECTOR and that code will be omitted from the build. The same is true for builds that are tuned using -march=native which effectively asks the library to not include runtime support hooks for x86 processors older than what you use.

Please note that, unlike Cygwin or MinGW, Cosmopolitan does not achieve broad support by bolting on a POSIX emulation layer. We do nothing more than (in most cases) stateless API translations that get you 90% of the way there in a fast lightweight manner. We therefore can't address some of the subtle differences, such as the nuances of absolute paths on Windows. Our approach could be compared to something more along the lines of, "the Russians just used a pencil to write in space", versus spending millions researching a pen like NASA.