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by guappa 362 days ago
Can you run ldd on any binary you currently have on your machine that is written in rust?

I eagerly await the results!
2 comments
tux3 362 days ago
I mean, sure, but what's your point?

Here's nu, a shell in Rust:

    $ ldd ~/.cargo/bin/nu
        linux-vdso.so.1 (0x00007f473ba46000)
        libssl.so.3 => /lib/x86_64-linux-gnu/libssl.so.3 (0x00007f47398f2000)
        libcrypto.so.3 => /lib/x86_64-linux-gnu/libcrypto.so.3 (0x00007f4739200000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f473b9cd000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f4739110000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f4738f1a000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f473ba48000)
        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f473b9ab000)
        libzstd.so.1 => /lib/x86_64-linux-gnu/libzstd.so.1 (0x00007f4738e50000)
And here's the Debian variant of ash, a shell in C:

    $ ldd /bin/sh     
        linux-vdso.so.1 (0x00007f88ae6b0000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f88ae44b000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f88ae6b2000)
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guappa 362 days ago
Well seems I was wrong about linking C libraries from rust.

The problem of increased RAM requirements and constant rebuilds are still very real, if only slightly less big because of dynamically linking C.

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bronson 362 days ago
That would have been a good post if you'd stopped at the first paragraph.

Your second paragraph is either a meaningless observation on the difference between static and dynamic linking or also incorrect. Not sure what your intent was.

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guappa 362 days ago
Why do facts offend you?
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whytevuhuni 362 days ago
I’m genuinely curious now, what made you so convinced that it would be completely statically linked?
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IshKebab 362 days ago
I think people often talk about Rust only supporting static linking so he probably inferred that it couldn't dynamically link with anything.

Also Go does produce fully static binaries on Linux and so it's at least reasonable to incorrectly guess that Rust does the same.

Definitely shouldn't be so confident though!

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CamouflagedKiwi 362 days ago
Go may or may not do that on Linux depending what you import. If you call things from `os/user` for example, you'll get a dynamically linked binary unless you build with `-tags osusergo`. A similar case exists for `net`.
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guappa 362 days ago
go by default links libc
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IshKebab 361 days ago
It doesn't. See the sibling comment.
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