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Justine Tunney e75ffde09e Get codebase completely working with LLVM 
You can now build Cosmopolitan with Clang:

    make -j8 MODE=llvm
    o/llvm/examples/hello.com

The assembler and linker code is now friendly to LLVM too.
So it's not needed to configure Clang to use binutils under
the hood. If you love LLVM then you can now use pure LLVM.
2021-02-09 02:57:32 -08:00
.github Create FUNDING.yml 2021-01-29 14:56:22 -08:00
.vscode Definen LLP64 data model for code completion 2021-02-04 16:56:43 -08:00
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usr/share Add Cosmopolitan Honeybadger to README.md 2021-02-04 03:31:03 -08:00
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README.md Get codebase completely working with LLVM 2021-02-09 02:57:32 -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-0.1.2.zip
unzip cosmopolitan-amalgamated-0.1.2.zip
echo 'main() { printf("hello world\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-0.1.2.tar.gz
tar xf cosmopolitan-0.1.2.tar.gz  # see releases page
cd cosmopolitan-0.1.2
make -j16
o//examples/hello.com
find o -name \*.com | xargs ls -rShal | less