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Justine Tunney 417797d218 Support dirfd relative iops on Windows 
We always favor calling functions like openat(), fstatat(), etc. because
Linux, XNU, FreeBSD, and OpenBSD all elected to support them, while some
systems like Android love them so much, that they stopped supporting the
old interfaces.

This change ensures that when dirfd is actually a dirfd and not AT_FDCWD
we'll do the right thing on Windows NT. We use an API that's been around
since Vista to accomplish that.

This change also adds exponential backoff to chdir() on Windows since it
seems almost as flaky on Windows 7 as the rmdir() function.
2021-01-30 01:49:43 -08:00
.github Create FUNDING.yml 2021-01-29 14:56:22 -08:00
ape Work towards improving signals and processes 2021-01-27 19:34:02 -08:00
build Work towards improving signals and processes 2021-01-27 19:34:02 -08:00
dsp Fix link order in cosmopolitan.a 2021-01-16 12:05:41 -08:00
examples Work towards improving signals and processes 2021-01-27 19:34:02 -08:00
libc Support dirfd relative iops on Windows 2021-01-30 01:49:43 -08:00
net Fix XNU / FreeBSD / OpenBSD / RHEL5 / NT bugs 2021-01-25 18:31:17 -08:00
test Support dirfd relative iops on Windows 2021-01-30 01:49:43 -08:00
third_party Work towards improving signals and processes 2021-01-27 19:34:02 -08:00
tool Make PATH search do the right thing w/ empty path 2021-01-29 01:27:09 -08:00
usr/share Add epoll and do more release readiness changes 2020-11-28 12:01:51 -08:00
.clang-format Add x86_64-linux-gnu emulator 2020-08-25 04:43:42 -07:00
.gitignore Make terminal ui binaries work well everywhere 2020-10-19 06:38:31 -07:00
Makefile Cosmopolitan 0.1 2021-01-28 16:19:10 -08:00
NOTICE Change license 2020-12-27 17:18:44 -08:00
README.md Cosmopolitan 0.1.1 2021-01-29 01:30:51 -08:00

README.md

Cosmopolitan

Cosmopolitan Libc makes C a build-once run-anywhere language, like Java, except it doesn't need an interpreter or virtual machine. Instead, it reconfigures stock GCC to output a POSIX-approved polyglot format that runs natively on Linux + Mac + Windows + FreeBSD + OpenBSD + BIOS with the best possible performance and the tiniest footprint imaginable.

Background

For an introduction to this project, please read the αcτµαlly pδrταblε εxεcµταblε blog post and cosmopolitan libc website. We also have API documentation.

Getting Started

Here's how to get started with the freestanding hermetically-sealed monolithic source repository:

tar xf cosmopolitan-0.1.1.tar.gz  # see our releases page
cd cosmo
make -j12
o//examples/hello.com

Here's how to get started with the amalgamated binaries, which let you bring your own build system:

unzip cosmopolitan-amalgamated-0.1.1.zip  # see our releases page
echo 'main() { printf("hello world\n"); }' >hello.c
gcc -g -O -static -fno-pie -no-pie -mno-red-zone -nostdlib -nostdinc \
  -o hello.com.dbg hello.c -Wl,--gc-sections -Wl,-z,max-page-size=0x1000 -fuse-ld=bfd \
  -Wl,-T,ape.lds -include cosmopolitan.h crt.o ape.o cosmopolitan.a
objcopy -SO binary hello.com.dbg hello.com
./hello.com