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[CMake] Error when LTO and lld are enabled on Darwin

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lld on Darwin does not currently support LTO.

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

llvm-svn: 287256
This commit is contained in:
Petr Hosek 2016-11-17 20:22:49 +00:00
parent 811103e354
commit ad6bd42c19
1 changed files with 3 additions and 0 deletions

3
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()