From d5429f85e8636baa95451a6903b6a0ae8e7c3309 Mon Sep 17 00:00:00 2001
From: Yichao Yu <yyc1992@gmail.com>
Date: Tue, 11 Aug 2020 00:38:46 -0400
Subject: [PATCH] Allow inspecting LLVM code during imaging mode (#36974)

---
 src/aotcompile.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/aotcompile.cpp b/src/aotcompile.cpp
index ba16df1414070..6b70547c25ed1 100644
--- a/src/aotcompile.cpp
+++ b/src/aotcompile.cpp
@@ -867,6 +867,11 @@ void *jl_get_llvmf_defn(jl_method_instance_t *mi, size_t world, char getwrapper,
         Function *F = NULL;
         if (m) {
             // if compilation succeeded, prepare to return the result
+            // For imaging mode, global constants are currently private without initializer
+            // which isn't legal. Convert them to extern linkage so that the code can compile
+            // and will better match what's actually in sysimg.
+            for (auto &global : output.globals)
+                global.second->setLinkage(GlobalValue::ExternalLinkage);
             if (optimize)
                 PM->run(*m.get());
             const std::string *fname;