From 2545ab0251dcd1328862f64129f7a3757c40d05a Mon Sep 17 00:00:00 2001
From: Petr Hosek <phosek@chromium.org>
Date: Thu, 17 Nov 2016 20:22:49 +0000
Subject: [PATCH] [CMake] Error when LTO and lld are enabled on Darwin

lld on Darwin does not currently support LTO.

Differential Revision: https://reviews.llvm.org/D26715

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@287256 91177308-0d34-0410-b5e6-96231b3b80d8
---
 cmake/modules/HandleLLVMOptions.cmake | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake
index b85b9b9cb30..5a60b3640e6 100644
--- a/cmake/modules/HandleLLVMOptions.cmake
+++ b/cmake/modules/HandleLLVMOptions.cmake
@@ -96,6 +96,9 @@ set(LTDL_SHLIB_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX})
 set(LLVM_PLUGIN_EXT ${CMAKE_SHARED_LIBRARY_SUFFIX})
 
 if(APPLE)
+  if(LLVM_ENABLE_LLD AND LLVM_ENABLE_LTO)
+    message(FATAL_ERROR "lld does not support LTO on Darwin")
+  endif()
   # Darwin-specific linker flags for loadable modules.
   set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,-flat_namespace -Wl,-undefined -Wl,suppress")
 endif()
-- 
2.50.1