From 713360a792ea54211624f7ac18e68c4c4a16aeb1 Mon Sep 17 00:00:00 2001
From: Feoramund <161657516+Feoramund@users.noreply.github.com>
Date: Sat, 17 May 2025 18:15:08 -0400
Subject: Keep shared libraries from calling main program's startup/cleanup
 procs on Linux

---
 src/llvm_backend.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'src/llvm_backend.cpp')

diff --git a/src/llvm_backend.cpp b/src/llvm_backend.cpp
index 7de147058..395238753 100644
--- a/src/llvm_backend.cpp
+++ b/src/llvm_backend.cpp
@@ -1907,6 +1907,10 @@ gb_internal lbProcedure *lb_create_startup_runtime(lbModule *main_module, lbProc
 	lb_add_attribute_to_proc(p->module, p->value, "optnone");
 	lb_add_attribute_to_proc(p->module, p->value, "noinline");
 
+	// Make sure shared libraries call their own runtime startup on Linux.
+	LLVMSetVisibility(p->value, LLVMHiddenVisibility);
+	LLVMSetLinkage(p->value, LLVMWeakAnyLinkage);
+
 	lb_begin_procedure_body(p);
 
 	lb_setup_type_info_data(main_module);
@@ -2016,6 +2020,10 @@ gb_internal lbProcedure *lb_create_cleanup_runtime(lbModule *main_module) { // C
 	lb_add_attribute_to_proc(p->module, p->value, "optnone");
 	lb_add_attribute_to_proc(p->module, p->value, "noinline");
 
+	// Make sure shared libraries call their own runtime cleanup on Linux.
+	LLVMSetVisibility(p->value, LLVMHiddenVisibility);
+	LLVMSetLinkage(p->value, LLVMWeakAnyLinkage);
+
 	lb_begin_procedure_body(p);
 
 	CheckerInfo *info = main_module->gen->info;
-- 
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