3 ms·

I don't know enough to compare to musl, but I suspect being ISC licensed (similar to musl's MIT license) allows for static linking without upstream impact such

I don't know enough to compare to musl, but I suspect being ISC licensed (similar to musl's MIT license) allows for static linking without upstream impact such as GPL. Would be curious regarding features and performance comparisons with musl, which seems to come up a little short compared to say gnu libc.

saghm 2y ago
I suspect parent commenter isn't just asking about static linking from the perspective of licensing but about technical feasibility; at least part of the reason people use musl is that static linking glibc isn't well supported.
jart 2y ago
Cosmo author here. We used to build our code with musl-cross-make. Once Cosmopolitan got good enough that we could compile GCC using Cosmo, our build latency dropped in half. https://x.com/JustineTunney/status/1726141024597324189 https://x.com/JustineTunney/status/1726141024597324189 Cosmopolitan Libc is 2x faster than Musl Libc for many CLI programs like GNU Make and GCC because it has vectorized string libraries like strlen(). Musl won't merge support it on x86. I even mailed Rich patches for it years ago. Cosmopolitan's malloc() function is very fast. If you link pthread_create() then it'll create a dlmalloc arena for each core dispatched by sched_getcpu(). If you don't use threads then it'll use a single dlmalloc arena without any locking or rdtscp overhead. Cosmo has pretty good thread support in general, plus little known synchronization primitives from Mike Burrows. You can do things like build a number crunching program with OpenMP and it'll actually run on MacOS and Windows. Cosmopolitan plays an important role in helping to enable the fastest AI software on CPUs. For example, Mozilla started an open source project called LLaMAfile a few months ago, which runs LLMs locally. It's based off the famous llama.cpp codebase. The main thing Mozilla did differently was they adopted Cosmopolitan Libc as its C library, which made it easy for us to obtain a 4x performance advantage. https://justine.lol/matmul/ https://justine.lol/matmul/ I'm actually giving a talk about it this week in San Francisco.
- jacobn 2y ago
  At the AI engineer fair, or some other event?
- 1vuio0pswjnm7 2y ago
  "We used to build our code with musl-cross-make." Wish there was something like musl.cc, i.e., static GCC less than 250 MiB, for cosmo libc.
  - jart 2y ago
    It's called cosmocc. https://github.com/jart/cosmopolitan/releases/download/3.5.1/cosmocc-3.5.1.zip https://github.com/jart/cosmopolitan/releases/download/3.5.1... the documentation is here: https://github.com/jart/cosmopolitan/blob/master/tool/cosmocc/README.md https://github.com/jart/cosmopolitan/blob/master/tool/cosmoc... and here https://justine.lol/cosmo3/#install https://justine.lol/cosmo3/#install

saghm 2y ago

I suspect parent commenter isn't just asking about static linking from the perspective of licensing but about technical feasibility; at least part of the reason people use musl is that static linking glibc isn't well supported.

jart 2y ago

Cosmo author here. We used to build our code with musl-cross-make. Once Cosmopolitan got good enough that we could compile GCC using Cosmo, our build latency dropped in half. https://x.com/JustineTunney/status/1726141024597324189 https://x.com/JustineTunney/status/1726141024597324189 Cosmopolitan Libc is 2x faster than Musl Libc for many CLI programs like GNU Make and GCC because it has vectorized string libraries like strlen(). Musl won't merge support it on x86. I even mailed Rich patches for it years ago. Cosmopolitan's malloc() function is very fast. If you link pthread_create() then it'll create a dlmalloc arena for each core dispatched by sched_getcpu(). If you don't use threads then it'll use a single dlmalloc arena without any locking or rdtscp overhead. Cosmo has pretty good thread support in general, plus little known synchronization primitives from Mike Burrows. You can do things like build a number crunching program with OpenMP and it'll actually run on MacOS and Windows. Cosmopolitan plays an important role in helping to enable the fastest AI software on CPUs. For example, Mozilla started an open source project called LLaMAfile a few months ago, which runs LLMs locally. It's based off the famous llama.cpp codebase. The main thing Mozilla did differently was they adopted Cosmopolitan Libc as its C library, which made it easy for us to obtain a 4x performance advantage. https://justine.lol/matmul/ https://justine.lol/matmul/ I'm actually giving a talk about it this week in San Francisco.

jacobn 2y ago
At the AI engineer fair, or some other event?
1vuio0pswjnm7 2y ago
"We used to build our code with musl-cross-make." Wish there was something like musl.cc, i.e., static GCC less than 250 MiB, for cosmo libc.
- jart 2y ago
  It's called cosmocc. https://github.com/jart/cosmopolitan/releases/download/3.5.1/cosmocc-3.5.1.zip https://github.com/jart/cosmopolitan/releases/download/3.5.1... the documentation is here: https://github.com/jart/cosmopolitan/blob/master/tool/cosmocc/README.md https://github.com/jart/cosmopolitan/blob/master/tool/cosmoc... and here https://justine.lol/cosmo3/#install https://justine.lol/cosmo3/#install