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[CMake] Add DARWIN_LTO_LIBRARY option to allow overriding -lto_library.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247308 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Bieneman 2015-09-10 17:28:51 +00:00
parent a37234f8c4
commit 4b5f4e5618
1 changed files with 7 additions and 0 deletions
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7
CMakeLists.txt
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@ -543,6 +543,13 @@ else(UNIX)
endif(NOT DEFINED CMAKE_INSTALL_RPATH)
endif()
if(APPLE AND DARWIN_LTO_LIBRARY)
set(CMAKE_EXE_LINKER_FLAGS
"${CMAKE_EXE_LINKER_FLAGS} -Wl,-lto_library -Wl,${DARWIN_LTO_LIBRARY}")
set(CMAKE_SHARED_LINKER_FLAGS
"${CMAKE_SHARED_LINKER_FLAGS} -Wl,-lto_library -Wl,${DARWIN_LTO_LIBRARY}")
endif()
# Work around a broken bfd ld behavior. When linking a binary with a
# foo.so library, it will try to find any library that foo.so uses and
# check its symbols. This is wasteful (the check was done when foo.so