From 2389f677f40a064417d0992f7bfff22b7eebf021 Mon Sep 17 00:00:00 2001
From: "Dongjia \"toka\" Zhang" <tokazerkje@outlook.com>
Date: Sat, 27 Aug 2022 15:51:11 +0200
Subject: [PATCH] OSX force_load option (#743)

* Update clang.rs

* fmt
---
 libafl_cc/src/clang.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libafl_cc/src/clang.rs b/libafl_cc/src/clang.rs
index 20c3db279a..875febece9 100644
--- a/libafl_cc/src/clang.rs
+++ b/libafl_cc/src/clang.rs
@@ -264,7 +264,10 @@ impl CompilerWrapper for ClangWrapper {
 
         if cfg!(unix) {
             if cfg!(target_vendor = "apple") {
-                self.add_link_arg(lib_file)
+                // Same as --whole-archive on linux
+                // Without this option, the linker picks the first symbols it finds and does not care if it's a weak or a strong symbol
+                // See: <https://stackoverflow.com/questions/13089166/how-to-make-gcc-link-strong-symbol-in-static-library-to-overwrite-weak-symbol>
+                self.add_link_arg("-Wl,-force_load").add_link_arg(lib_file)
             } else {
                 self.add_link_arg("-Wl,--whole-archive")
                     .add_link_arg(lib_file)