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Justine Tunney a8d7195777 Make Cosmopolitan ANSI C89 compatible 
You can now use cosmopolitan.h with an ANSI C89 compiler like MSVC. The
Cosmopolitan codebase itself won't support being compiled that way. But
you can build objects that link against Cosmopolitan using any compiler
and you can furthermore use tools like IntelliSense that can't even GNU

See also #40
2021-02-03 17:48:59 -08:00
.github Create FUNDING.yml 2021-01-29 14:56:22 -08:00
ape Add q keyboard shortcut to printvideo.com (#37) 2021-02-03 15:53:33 -08:00
build Implement more security stuff 2021-02-02 20:21:06 -08:00
dsp Make ANSI mode closer to being ANSI 2021-02-03 17:14:17 -08:00
examples Delete LIBC_CALLS_HEFTY 2021-02-02 22:17:53 -08:00
libc Make Cosmopolitan ANSI C89 compatible 2021-02-03 17:48:59 -08:00
net Make C memory safe like Rust 2021-02-01 03:58:46 -08:00
test Make Cosmopolitan ANSI C89 compatible 2021-02-03 17:48:59 -08:00
third_party Make Cosmopolitan ANSI C89 compatible 2021-02-03 17:48:59 -08:00
tool Make Cosmopolitan ANSI C89 compatible 2021-02-03 17:48:59 -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 Make Cosmopolitan ANSI C89 compatible 2021-02-03 17:48:59 -08:00
NOTICE Change license 2020-12-27 17:18:44 -08:00
README.md Cosmopolitan 0.1.2 2021-01-30 10:13:13 -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-0.1.2.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-0.1.2.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