3 files changed, 10 insertions, 3 deletions
diff --git a/src/tools/rust-analyzer/Cargo.lock b/src/tools/rust-analyzer/Cargo.lock
index 3b8a1438469..d62c5571221 100644
--- a/src/tools/rust-analyzer/Cargo.lock
+++ b/src/tools/rust-analyzer/Cargo.lock
@@ -1377,6 +1377,7 @@ version = "0.0.0"
 dependencies = [
  "expect-test",
  "intern",
+ "libc",
  "libloading",
  "memmap2",
  "object 0.33.0",
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv/Cargo.toml b/src/tools/rust-analyzer/crates/proc-macro-srv/Cargo.toml
index 00695c54737..191535ac55e 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv/Cargo.toml
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv/Cargo.toml
@@ -14,6 +14,7 @@ doctest = false
 
 [dependencies]
 object.workspace = true
+libc.workspace = true
 libloading.workspace = true
 memmap2.workspace = true
 
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv/src/dylib.rs b/src/tools/rust-analyzer/crates/proc-macro-srv/src/dylib.rs
index fe15d42b4e4..cbf7a277bfa 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv/src/dylib.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv/src/dylib.rs
@@ -28,11 +28,16 @@ fn load_library(file: &Utf8Path) -> Result<Library, libloading::Error> {
 
 #[cfg(unix)]
 fn load_library(file: &Utf8Path) -> Result<Library, libloading::Error> {
+    // not defined by POSIX, different values on mips vs other targets
+    #[cfg(target_env = "gnu")]
+    use libc::RTLD_DEEPBIND;
     use libloading::os::unix::Library as UnixLibrary;
-    use std::os::raw::c_int;
+    // defined by POSIX
+    use libloading::os::unix::RTLD_NOW;
 
-    const RTLD_NOW: c_int = 0x00002;
-    const RTLD_DEEPBIND: c_int = 0x00008;
+    // MUSL and bionic don't have it..
+    #[cfg(not(target_env = "gnu"))]
+    const RTLD_DEEPBIND: std::os::raw::c_int = 0x0;
 
     unsafe { UnixLibrary::open(Some(file), RTLD_NOW | RTLD_DEEPBIND).map(|lib| lib.into()) }
 }