[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
llvm-svn: 287256
diff --git a/llvm/cmake/modules/HandleLLVMOptions.cmake b/llvm/cmake/modules/HandleLLVMOptions.cmake
index b85b9b9..5a60b36 100644
--- a/llvm/cmake/modules/HandleLLVMOptions.cmake
+++ b/llvm/cmake/modules/HandleLLVMOptions.cmake
@@ -96,6 +96,9 @@
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()