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I'm trying to cross compile a rust project with cross. My project depends on libcurl. The linker can find the libcurl .so but not the libraries which it depends on:

I'm running:

cross build -vv --target=arm-unknown-linux-gnueabihf

which gives me:

  = note: /usr/arm-linux-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/8.3.0/../../../../arm-linux-gnueabihf/bin/ld: warning: libnghttp2.so.14, needed by /usr/lib/arm-linux-gnueabihf/libcurl.so, not found (try using -rpath or -rpath-link)

I've already confirmed that the library its looking for exists:

root@80a13d68ad84:/# find /usr/lib -name "libnghttp2.so.14"
/usr/lib/x86_64-linux-gnu/libnghttp2.so.14
/usr/lib/arm-linux-gnueabihf/libnghttp2.so.14

I've read about rust build scripts here, where I can add paths to the library search path, but that has not resolved the issue, this is what my build.rs looks like:

fn main() {
    println!("cargo:rustc-link-search=native=/usr/lib/arm-linux-gnueabihf");
}

The error suggests using -rpath or -rpath-link, so how do I configure the rpath in rust? Or is there a different way to resolve this issue?

XORNAND
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1 Answers1

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You might be able to specify linker arguments by using an environment variable like

RUSTFLAGS="-C link-arg=--rpath=..."

Cargo allows placing the same kind of flag in the configuration file (see here) but I'm not sure if cross has the same support for something like that.

Victor Nordam Suadicani
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