From ad00a3db4dde0507f8a6be5f1c5eb2b54d242f0a Mon Sep 17 00:00:00 2001
From: Joseph Huber <jhuber6@vols.utk.edu>
Date: Tue, 23 May 2023 09:16:30 -0500
Subject: [PATCH] [libc][AMDGPU] Disable the AMDGPU backend's ctor/dtor
 lowering for libc

The AMDGPU backend has a built-in pass to lower constructors. We do this
manually in the `start.cpp` implementation so we can disable this to
keep the binaries smaller.

Differential Revision: https://reviews.llvm.org/D151213
---
 libc/startup/gpu/amdgpu/CMakeLists.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libc/startup/gpu/amdgpu/CMakeLists.txt b/libc/startup/gpu/amdgpu/CMakeLists.txt
index 0f1d4edf285d..e7c0aeafafd9 100644
--- a/libc/startup/gpu/amdgpu/CMakeLists.txt
+++ b/libc/startup/gpu/amdgpu/CMakeLists.txt
@@ -25,4 +25,5 @@ target_link_libraries(
   "-mcpu=${LIBC_GPU_TARGET_ARCHITECTURE}"
   "--target=${LIBC_GPU_TARGET_TRIPLE}"
   "-flto"
+  "-Wl,-mllvm,-amdgpu-lower-global-ctor-dtor=0"
 )