cosmopolitan/libc
Justine Tunney 0e85b136ae Fix Windows 7 support (#19)
This change pays off technical debt with the function -> DLL mappings in
libc/nt/master.sh, which was originally defined based on binary analysis
on Windows 10. It's now been updated so the kernel32/kernelbase/advapi32
imports should be exactly as they are written, on the MSDN documentation
and that wouldn't have been easy without Geoff Chappell's work thank him

https://www.geoffchappell.com/studies/windows/win32/index.htm
2020-12-28 13:52:02 -08:00
..
alg Change license 2020-12-27 17:18:44 -08:00
bits Change license 2020-12-27 17:18:44 -08:00
calls Fix Windows 7 support (#19) 2020-12-28 13:52:02 -08:00
crt Change license 2020-12-27 17:18:44 -08:00
crypto Change license 2020-12-27 17:18:44 -08:00
dns Fix Windows 7 support (#19) 2020-12-28 13:52:02 -08:00
elf Change license 2020-12-27 17:18:44 -08:00
fmt Fix Windows 7 support (#19) 2020-12-28 13:52:02 -08:00
integral Add l suffix to yoink nop 2020-12-28 11:38:38 -08:00
intrin Change license 2020-12-27 17:18:44 -08:00
isystem Fold conv package into fmt 2020-12-09 16:52:00 -08:00
linux Improve documentation 2020-12-27 07:02:35 -08:00
log Fix Windows 7 support (#19) 2020-12-28 13:52:02 -08:00
math Change license 2020-12-27 17:18:44 -08:00
mem Change license 2020-12-27 17:18:44 -08:00
nexgen32e Change license 2020-12-27 17:18:44 -08:00
nt Fix Windows 7 support (#19) 2020-12-28 13:52:02 -08:00
ohmyplus Change license 2020-12-27 17:18:44 -08:00
rand Fix Windows 7 support (#19) 2020-12-28 13:52:02 -08:00
runtime Fix Windows 7 support (#19) 2020-12-28 13:52:02 -08:00
sock Fix Windows 7 support (#19) 2020-12-28 13:52:02 -08:00
stdio Fix Windows 7 support (#19) 2020-12-28 13:52:02 -08:00
str Fix strlcpy 2020-12-27 21:35:38 -08:00
stubs Change license 2020-12-27 17:18:44 -08:00
sysv Change license 2020-12-27 17:18:44 -08:00
testlib Change license 2020-12-27 17:18:44 -08:00
time Fix Windows 7 support (#19) 2020-12-28 13:52:02 -08:00
tinymath Change license 2020-12-27 17:18:44 -08:00
unicode Change license 2020-12-27 17:18:44 -08:00
x Change license 2020-12-27 17:18:44 -08:00
zipos Fix Windows 7 support (#19) 2020-12-28 13:52:02 -08:00
README.md Add x86_64-linux-gnu emulator 2020-08-25 04:43:42 -07:00
assert.h Add chibicc 2020-12-06 16:20:21 -08:00
complex.h Make improvements 2020-12-01 03:43:40 -08:00
dce.h Auto-generate some documentation 2020-12-26 02:09:07 -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 Fold conv package into fmt 2020-12-09 16:52:00 -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.internal.inc Change license 2020-12-27 17:18:44 -08:00
macros.h Make minor improvements 2020-12-23 23:42:56 -08:00
macros.internal.inc Change license 2020-12-27 17:18:44 -08:00
math.h Further refine documentation 2020-12-27 17:05:03 -08:00
notice.inc Change license 2020-12-27 17:18:44 -08:00
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.