From 84e449008c470052ef2b7f3200765f71d9c30513 Mon Sep 17 00:00:00 2001
From: Giulio Eulisse <10544+ktf@users.noreply.github.com>
Date: Sat, 7 Nov 2026 14:37:51 +0100
Subject: [PATCH] GPU Metal: relink the backend library when the kernels change

The Metal IR is packed into the library with -sectcreate at link time,
but the link step did not depend on the IR file. A change to the kernel
code alone rebuilt the IR without relinking the library, which kept
running the old kernels.
---
 GPU/GPUTracking/Base/metal/CMakeLists.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/GPU/GPUTracking/Base/metal/CMakeLists.txt b/GPU/GPUTracking/Base/metal/CMakeLists.txt
index 0b8e10d5aa2f8..61ea53064557e 100644
--- a/GPU/GPUTracking/Base/metal/CMakeLists.txt
+++ b/GPU/GPUTracking/Base/metal/CMakeLists.txt
@@ -103,6 +103,9 @@ if(METAL_ENABLED) # BUILD Metal source code for runtime compilation target
   target_link_options(${targetName}
                       PRIVATE
                       "-Wl,-sectcreate,__DATA,__gpu_resource,${METAL_BIN}.ir")
+  # The linker reads the IR, so relink when it changes: otherwise a change to the
+  # kernels alone leaves the old code in the library.
+  set_property(TARGET ${targetName} APPEND PROPERTY LINK_DEPENDS ${METAL_BIN}.ir)
   add_dependencies(${targetName} metal_preprocessed_code)
   add_dependencies(${targetName} metal_intermediate_representation)
 endif()