cosmopolitan/libc
Justine Tunney 8d24a18c62
Tune magic division for size
This helps it avoid generating a branch instruction.
2023-05-10 21:32:04 -07:00
..
calls Work on magic numbers for aarch64 2023-05-10 04:20:48 -07:00
crt Get LIBC_RUNTIME and LIBC_CALLS building on aarch64 2023-05-10 04:20:47 -07:00
dns Get llama.com building as an aarch64 native binary 2023-05-10 04:20:47 -07:00
elf Get llama.com building as an aarch64 native binary 2023-05-10 04:20:47 -07:00
fmt Fix some more issues with aarch64 and llama.cpp 2023-05-10 07:34:26 -07:00
integral Work on magic numbers for aarch64 2023-05-10 04:20:48 -07:00
intrin Fix the build 2023-05-10 10:14:15 -07:00
isystem Add Intel intrinsics headers 2023-04-27 05:44:38 -07:00
linux Run clang-format on most sources 2023-04-27 05:44:32 -07:00
log Get llama.com building as an aarch64 native binary 2023-05-10 04:20:47 -07:00
mem Get llama.com building as an aarch64 native binary 2023-05-10 04:20:47 -07:00
nexgen32e Do some more aarch64 fixups 2023-05-10 04:20:47 -07:00
nt Get LIBC_RUNTIME and LIBC_CALLS building on aarch64 2023-05-10 04:20:47 -07:00
runtime Make llama.com -h print to stdout 2023-05-10 04:55:59 -07:00
sock Do some more aarch64 fixups 2023-05-10 04:20:47 -07:00
stdio Fix some more issues with aarch64 and llama.cpp 2023-05-10 07:34:26 -07:00
str Do some basic housekeeping in LIBC_STR 2023-05-10 06:17:20 -07:00
stubs Get llama.com building as an aarch64 native binary 2023-05-10 04:20:47 -07:00
sysv Bring MODE=tiny binary sizes down to 20kb minimum 2023-05-10 04:20:48 -07:00
testlib Work on magic numbers for aarch64 2023-05-10 04:20:48 -07:00
thread Fix some more issues with aarch64 and llama.cpp 2023-05-10 07:34:26 -07:00
time Get llama.com building as an aarch64 native binary 2023-05-10 04:20:47 -07:00
tinymath Tune magic division for size 2023-05-10 21:32:04 -07:00
vga Work on magic numbers for aarch64 2023-05-10 04:20:48 -07:00
x Run clang-format on most sources 2023-04-27 05:44:32 -07:00
zipos Work on magic numbers for aarch64 2023-05-10 04:20:48 -07:00
ar.h Add a turfwar hilbert decoration 2023-01-03 18:28:35 -08:00
assert.h Rename hidden keyword to _Hide 2022-11-08 12:55:28 -08:00
atomic.h Optimize memory layout 2022-09-12 04:26:52 -07:00
complex.h Fix some more reported issues 2022-04-28 20:36:33 -07:00
dce.h Work on magic numbers for aarch64 2023-05-10 04:20:48 -07:00
disclaimer.inc Improve Libc by making Python work even better 2021-08-18 22:16:23 -07:00
dos.h Mold the redbean binary to minimize page faults 2021-05-03 12:14:13 -07:00
empty.s Do some basic build tuning 2023-05-10 04:20:46 -07:00
errno.h Improve cancellations, randomness, and time 2022-11-05 23:45:32 -07:00
imag.internal.h Remove evil constants from cosmopolitan.h 2022-12-17 00:42:45 -08:00
inttypes.h Fix inttypes.h FAST16 macros to have a correct definition (#791) 2023-03-29 00:19:40 -07:00
iso646.internal.h Add more missing C / C++ headers 2022-09-04 04:53:52 -07:00
libc.mk Add VGA support on bare metal (#588) 2022-09-06 18:41:08 -07:00
limits.h Improve cosmo's conformance to libc-test 2022-10-10 17:52:41 -07:00
literal.h Improve cosmo's conformance to libc-test 2022-10-10 17:52:41 -07:00
mach.h
macho.internal.h
macros.internal.h Get llama.com building as an aarch64 native binary 2023-05-10 04:20:47 -07:00
math.h Get libc/tinymath/ compiling on aarch64 2023-05-10 04:20:46 -07:00
notice.inc Improve Libc by making Python work even better 2021-08-18 22:16:23 -07:00
notice.internal.h
paths.h Embed cocmd.com interpreter for system() / open() 2022-10-02 15:29:57 -07:00
README.md Reformat libc README.md (#437) 2022-06-21 07:50:42 -07:00
stdalign.internal.h Add more missing C / C++ headers 2022-09-04 04:53:52 -07:00
type2str.h Improve synchronization 2022-04-15 15:31:55 -07:00
zip.h Fold LIBC_BITS into LIBC_INTRIN 2022-08-11 12:13:18 -07:00

Cosmopolitan Standard Library

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.