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Matheus Moreira c6807ca55b
Makefile: ensure linked output directory exists 
Building in RAM is faster and reduces wear on storage devices.
This can be achieved by symlinking the output directory to a tmpfs location:

    ln -s /tmp/cosmopolitan/o o
    ln -s $XDG_RUNTIME_DIR/cosmopolitan/o o

In most Linux distributions, there is a tmpfs mounted at /tmp.
Distributions using systemd also provide a tmpfs mounted at /run
with private directories for every user at /run/user/$UID.
The XDG_RUNTIME_DIR environment variable usually points to this directory.

These file systems are ephemeral: the whole tree is lost when it is unmounted.
This may cause build errors if the link points to a directory that no longer exists.
It is therefore necessary to ensure its existence.
2021-03-01 03:32:50 -03:00
.github Create FUNDING.yml 2021-01-29 14:56:22 -08:00
.vscode Perform some code cleanup 2021-02-27 10:33:32 -08:00
ape Fix zip executables on MacOS 2021-02-27 18:16:59 -08:00
build Fix zip executables on MacOS 2021-02-27 18:16:59 -08:00
dsp Get codebase completely working with LLVM 2021-02-09 02:57:32 -08:00
examples Define console.log() in hellojs.com example 2021-02-27 14:15:13 -08:00
libc Improve limits.h 2021-02-28 20:59:19 -08:00
net Add curl example (#42) 2021-02-18 19:20:41 -08:00
test Add hyperbolic math functions 2021-02-28 01:27:50 -08:00
third_party Perform some code cleanup 2021-02-27 10:33:32 -08:00
tool Issue new Blinkenlights release 2021-02-27 22:35:50 -08:00
usr/share Add Cosmopolitan Honeybadger to README.md 2021-02-04 03:31:03 -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
LICENSE Add title to the LICENSE file 2021-02-27 13:25:59 -08:00
Makefile Makefile: ensure linked output directory exists 2021-03-01 03:32:50 -03:00
README.md Document support vector 2021-02-28 16:41:53 -08:00

README.md

Cosmopolitan Honeybadger

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 and Clang to output a POSIX-approved polyglot format that runs natively on Linux + Mac + Windows + FreeBSD + OpenBSD + NetBSD + 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

If you're doing your development work on Linux or BSD then you need just five files to get started:

wget https://justine.lol/cosmopolitan/cosmopolitan-amalgamation-0.2.zip
unzip cosmopolitan-amalgamation-0.2.zip
printf 'main() { printf("hello world\\n"); }\n' >hello.c
gcc -g -O -static -nostdlib -nostdinc -fno-pie -no-pie -mno-red-zone \
  -o hello.com.dbg hello.c -fuse-ld=bfd -Wl,-T,ape.lds \
  -include cosmopolitan.h crt.o ape.o cosmopolitan.a
objcopy -S -O binary hello.com.dbg hello.com
./hello.com

If you're developing on Windows or MacOS then you need to download an x86_64-pc-linux-gnu toolchain beforehand. See the Compiling on Windows tutorial. It's needed because the ELF object format is what makes universal binaries possible.

Cosmopolitan can also be compiled from source on any Linux distro.

wget https://justine.lol/cosmopolitan/cosmopolitan-0.2.tar.gz
tar xf cosmopolitan-0.2.tar.gz  # see releases page
cd cosmopolitan-0.2
make -j16
o//examples/hello.com
find o -name \*.com | xargs ls -rShal | less

Support Vector

Platform Min Version Circa
AMD K8 Venus 2005
Intel Core 2006
New Technology Vista 2006
GNU/Systemd 2.6.18 2007
XNU's Not UNIX 15.6 2018
FreeBSD 12 2018
OpenBSD 6.4 2018
NetBSD 9.1 2020