From 162365e3d64786dcd6deca7c08285e9c16aa26cb Mon Sep 17 00:00:00 2001
From: bjorn3 <17426603+bjorn3@users.noreply.github.com>
Date: Tue, 28 Feb 2023 14:36:44 +0000
Subject: [PATCH] Fix loading of dylibs not in the search path in jit mode

Reported in #1249
---
 src/driver/jit.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/driver/jit.rs b/src/driver/jit.rs
index 8b5a2da2c59..f6a48e3257b 100644
--- a/src/driver/jit.rs
+++ b/src/driver/jit.rs
@@ -311,7 +311,11 @@ fn dep_symbol_lookup_fn(
         .find(|(crate_type, _data)| *crate_type == rustc_session::config::CrateType::Executable)
         .unwrap()
         .1;
-    for &cnum in &crate_info.used_crates {
+    // `used_crates` is in reverse postorder in terms of dependencies. Reverse the order here to
+    // get a postorder which ensures that all dependencies of a dylib are loaded before the dylib
+    // itself. This helps the dynamic linker to find dylibs not in the regular dynamic library
+    // search path.
+    for &cnum in crate_info.used_crates.iter().rev() {
         let src = &crate_info.used_crate_source[&cnum];
         match data[cnum.as_usize() - 1] {
             Linkage::NotLinked | Linkage::IncludedFromDylib => {}