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I just had a look. Installed nightly Rust on OSX and ran through it a hello world program - 307K! HW in C with gcc 4.2.1 (LLVM) makes 8.7K.

• epdtry 12y ago
  Rust produces statically linked binaries by default, while GCC and Clang default to dynamic linking. For a better comparison, pass `-static` to GCC/Clang, or pass `-C prefer-dynamic` to rustc. On Linux, with dynamic linking: rustc: 8656 bytes clang: 6960 bytes gcc: 6688 bytes
  • Keyframe 12y ago
    Ah of course, thanks! That makes sense. Since I'm on OSX and -static doesn't work with GCC (libs provided aren't static) - I'll believe it instead. Rustc is now 9K, which is really close to 8.7 of GCC.
  • swetland 12y ago
    Is it possible to make actual static binaries in rust? By default it compiles in the rust libraries, but depends on glibc and friends (and is not actually a static binary) -- at least with tip of tree rust from yesterday.
    • Rusky 12y ago
      You can drop the glibc dependency pretty easily. One way (used for a lot of toy kernels that have been written in Rust) is to add the #![no_std] attribute and then explicitly pull in any static dependencies you still use (like libcore).