From 317daa3c004fbb1738e0af6acfbaf50c403c8230 Mon Sep 17 00:00:00 2001
From: Matthias Baesken <mbaesken@openjdk.org>
Date: Thu, 4 Dec 2025 08:36:00 +0000
Subject: [PATCH] 8372643: Warning message on macos when building the JDK -
 (arm64) /tmp/lto.o unable to open object file: No such file or directory

Reviewed-by: erikj
---
 make/common/native/Flags.gmk | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/make/common/native/Flags.gmk b/make/common/native/Flags.gmk
index 843701cb4db..efb4c08e74c 100644
--- a/make/common/native/Flags.gmk
+++ b/make/common/native/Flags.gmk
@@ -229,6 +229,11 @@ define SetupLinkerFlags
   # TOOLCHAIN_TYPE plus OPENJDK_TARGET_OS
   ifeq ($$($1_LINK_TIME_OPTIMIZATION), true)
     $1_EXTRA_LDFLAGS += $(LDFLAGS_LTO)
+    # Instruct the ld64 linker not to delete the temporary object file
+    # generated during Link Time Optimization
+    ifeq ($(call isTargetOs, macosx), true)
+      $1_EXTRA_LDFLAGS += -Wl,-object_path_lto,$$($1_OBJECT_DIR)/$$($1_NAME)_lto_helper.o
+    endif
   endif
 
   $1_EXTRA_LDFLAGS += $$($1_LDFLAGS_$(OPENJDK_TARGET_OS_TYPE)) $$($1_LDFLAGS_$(OPENJDK_TARGET_OS)) \