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From 306e5545261b7d71557a80a45c1f889e7539d3ab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C4=81vis=20Mos=C4=81ns?=
Date: Wed, 29 Apr 2026 22:37:01 +0300
Subject: [PATCH] Fix LTO build for ROCm when default compiler is GCC
---
CMakeLists.txt | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index fb8a1d7e1e1..0b6e5d9e060 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -230,6 +230,13 @@ if(VLLM_GPU_LANG STREQUAL "HIP")
#
set(CMAKE_${VLLM_GPU_LANG}_FLAGS "${CMAKE_${VLLM_GPU_LANG}_FLAGS} -Wno-unused-result -Wno-unused-value")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-result -Wno-unused-value")
+
+ # When using LTO then *.cpp files must be compiled with same compiler as used linker
+ # So if HIP uses clang linker we also must use it
+ # Otherwise symbols will be missing from .so
+ if (CMAKE_CXX_FLAGS MATCHES "\-flto")
+ set(CMAKE_CXX_COMPILER ${CMAKE_HIP_COMPILER})
+ endif()
endif()
#
--
2.53.0
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