Don't link with libdl on musl

.github/workflows/libloading.yml

@@ -48,6 +48,16 @@ jobs:
       - name: Compile without the standard library
         run: cargo clean && cargo +nightly build -Zbuild-std=core,alloc --no-default-features
 
+  musl-rust-lld-link-test:
+    runs-on: ubuntu-latest
+    # This test checks if binaries using libloading can be linked using rust-lld linker for target environments that
+    # provide a unified libc (e.g. musl) without needing to provide additional library paths to the linker.
+    steps:
+      - uses: actions/checkout@v4
+      - run: rustup install stable --profile=minimal
+      - run: rustup target add x86_64-unknown-linux-musl
+      - run: RUSTFLAGS="-Clinker=rust-lld" cargo build --target=x86_64-unknown-linux-musl --example e1
+
   windows-test:
     runs-on: windows-latest
     strategy:

examples/e1.rs

@@ -0,0 +1,5 @@
+fn main() {
+    unsafe {
+        libloading::Library::new("libc.so").unwrap();
+    }
+}

src/os/unix/mod.rs

@@ -479,7 +479,14 @@ impl<T> fmt::Debug for Symbol<T> {
 }
 
 // Platform specific things
-#[cfg_attr(any(target_os = "linux", target_os = "android"), link(name = "dl"))]
+#[cfg_attr(
+    any(
+        all(target_os = "linux", not(target_env = "musl")),
+        target_os = "android"
+    ),
+    link(name = "dl")
+)]
+#[cfg_attr(all(target_os = "linux", target_env = "musl"), link(name = "c"))]
 #[cfg_attr(any(target_os = "freebsd", target_os = "dragonfly"), link(name = "c"))]
 extern "C" {
     fn dlopen(