Strip extern function symbols? | Rust Programming Language Community | Page 1

golden tide Dec 14, 2024, 9:33 AM

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refer to this post:
https://users.rust-lang.org/t/strip-extern-function-symbols/122508?u=leyloe

The Rust Programming Language Forum

So I made a C script that defines a function for lets say it prints "hello" called hello() And I link that C source file to my rust program using cc finally i invoke the function after placing extern "C" somewhere in the script the problem is, is that, no matter what rustc flag, cargo parameter, strip all, option i pass, i can't seem to get r...

pastel vapor Dec 14, 2024, 9:39 AM

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why do you need to do that

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and you are on windows right

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which options have you tried

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have you tried https://doc.rust-lang.org/cargo/reference/profiles.html#strip

Profiles - The Cargo Book

golden tide Dec 14, 2024, 9:45 AM

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pastel vapor and you are on windows right

yes

golden tide Dec 14, 2024, 9:45 AM

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pastel vapor have you tried https://doc.rust-lang.org/cargo/reference/profiles.html#strip

yes

golden tide Dec 14, 2024, 9:45 AM

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pastel vapor why do you need to do that

dmca measures

pastel vapor Dec 14, 2024, 9:45 AM

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what

golden tide Dec 14, 2024, 9:46 AM

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pastel vapor what

just executable protection in general

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😐

pastel vapor Dec 14, 2024, 9:46 AM

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protection from what

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stripping symbols doesnt stop people from reverse engineering things

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what kind of dmca measures

golden tide Dec 14, 2024, 9:48 AM

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why does that matter, i still need to get rid of symbols, and this is only one step, ofc it wont stop reverse engineers

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it's just the symbols provide a good concept of how my program works

pastel vapor Dec 14, 2024, 9:49 AM

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why do you need to stop people knowing how your program works

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have you tried environment variables that cc uses to pass to the c compiler to strip the symbols from the compiled c

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https://docs.rs/cc/latest/cc/index.html#external-configuration-via-environment-variables

cc - Rust

A library for Cargo build scripts to compile a set of C/C++/assembly/CUDA files into a static archive for Cargo to link into the crate being built. This crate does not compile code itself; it calls out to the default compiler for the platform. This crate will automatically detect situations such as cross compilation and various environment varia...

golden tide Dec 14, 2024, 9:50 AM

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pastel vapor have you tried environment variables that `cc` uses to pass to the c compiler to...

wdym

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like --strip-all?

pastel vapor Dec 14, 2024, 9:52 AM

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maybe

golden tide Dec 14, 2024, 9:52 AM

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pastel vapor maybe

i tried that, ill check again

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nah, that flag isn't specific to cl.exe

pastel vapor Dec 14, 2024, 9:57 AM

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not sure maybe #windows-dev knows

tawdry shadow Dec 14, 2024, 11:24 PM

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The only symbols you can see in a Windows binary are those exported from the binary

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There is nothing to strip, as all debug symbols are in a separate .pdb file

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some tools will automatically load the .pdb and show you symbols via the .pdb

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if you use something like https://github.com/lucasg/Dependencies you can see exactly what is actually exported

GitHub

GitHub - lucasg/Dependencies: A rewrite of the old legacy software ...

A rewrite of the old legacy software "depends.exe" in C# for Windows devs to troubleshoot dll load dependencies issues. - lucasg/Dependencies

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and if something is being exported that you don't want exported, then there's a couple ways to solve that

pastel vapor Dec 15, 2024, 1:22 AM

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i thought some symbols are in the exe as well

#Strip extern function symbols?