[libc-commits] [libc] [libc] Expose the AMDGPU code object version (PR #152931)

[Joseph Huber via libc-commits]

https://github.com/jhuber6 created https://github.com/llvm/llvm-project/pull/152931

Summary:
People might want to modify this to run on older machines. Expose this
so it can be set with
`-DRUNTIMES_amdgcn-amd-amdhsa_LIBC_GPU_CODE_OBJECT_VERSION`.


>From 02239847305c20b3bcd6928516c7013c298e270f Mon Sep 17 00:00:00 2001
From: Joseph Huber <huberjn at outlook.com>
Date: Sun, 10 Aug 2025 12:12:20 -0500
Subject: [PATCH] [libc] Expose the AMDGPU code object version

Summary:
People might want to modify this to run on older machines. Expose this
so it can be set with
`-DRUNTIMES_amdgcn-amd-amdhsa_LIBC_GPU_CODE_OBJECT_VERSION`.
---
 libc/cmake/modules/prepare_libc_gpu_build.cmake | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/libc/cmake/modules/prepare_libc_gpu_build.cmake b/libc/cmake/modules/prepare_libc_gpu_build.cmake
index f8f5a954e5e91..df1de1454c3eb 100644
--- a/libc/cmake/modules/prepare_libc_gpu_build.cmake
+++ b/libc/cmake/modules/prepare_libc_gpu_build.cmake
@@ -100,12 +100,10 @@ if(NOT TARGET libc.utils.gpu.loader AND gpu_loader_executable)
   )
 endif()
 
-if(LIBC_TARGET_ARCHITECTURE_IS_AMDGPU)
-  # The AMDGPU environment uses different code objects to encode the ABI for
-  # kernel calls and intrinsic functions. We want to specify this manually to
-  # conform to whatever the test suite was built to handle.
-  set(LIBC_GPU_CODE_OBJECT_VERSION 6)
-endif()
+# The AMDGPU environment uses different code objects to encode the ABI for
+# kernel calls and intrinsic functions. We want to expose this to conform to
+# whatever the test suite was built to handle.
+set(LIBC_GPU_CODE_OBJECT_VERSION "6" CACHE STRING "AMDGPU Code object ABI to use")
 
 if(LIBC_TARGET_ARCHITECTURE_IS_NVPTX)
   # FIXME: This is a hack required to keep the CUDA package from trying to find