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| author | Chris Bieneman <beanz@apple.com> | 2015-09-11 20:42:57 +0000 |
|---|---|---|
| committer | Chris Bieneman <beanz@apple.com> | 2015-09-11 20:42:57 +0000 |
| commit | 744267765caabf432cbcc126ad2726d96761a865 (patch) | |
| tree | 6f2f29161b73f2f7ad84204d60580393a9b2dcff | |
| parent | f54d6796e3310d3393ac0ca24954091b4775ad39 (diff) | |
| download | llvm-744267765caabf432cbcc126ad2726d96761a865.zip llvm-744267765caabf432cbcc126ad2726d96761a865.tar.gz llvm-744267765caabf432cbcc126ad2726d96761a865.tar.bz2 | |
[CMake] [Darwin] Add support for building bootstrap builds with -flto
When building with LTO the bootstrap builds need to depend on libLTO, llvm-ar, and llvm-ranlib, which all need to be passed into the bootstrap build. This functionality only works on Darwin.
llvm-svn: 247467
| -rw-r--r-- | clang/CMakeLists.txt | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/clang/CMakeLists.txt b/clang/CMakeLists.txt index d08265c..8b90259 100644 --- a/clang/CMakeLists.txt +++ b/clang/CMakeLists.txt @@ -588,12 +588,21 @@ if (CLANG_ENABLE_BOOTSTRAP) set(STAMP_DIR ${CMAKE_CURRENT_BINARY_DIR}/bootstrap-stamps/) set(BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/bootstrap-bins/) + # If on Darwin we need to make bootstrap depend on LTO and pass + # DARWIN_LTO_LIBRARY so that -flto will work using the just-built compiler + if(APPLE) + set(LTO_DEP LTO llvm-ar llvm-ranlib) + set(LTO_LIBRARY -DDARWIN_LTO_LIBRARY=${CMAKE_BINARY_DIR}/lib/libLTO.dylib) + set(LTO_AR -DCMAKE_AR=${CMAKE_BINARY_DIR}/bin/llvm-ar) + set(LTO_RANLIB -DCMAKE_RANLIB=${CMAKE_BINARY_DIR}/bin/llvm-ranlib) + endif() + add_custom_target(bootstrap-clear DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/bootstrap-cleared ) add_custom_command( OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/bootstrap-cleared - DEPENDS clang + DEPENDS clang ${LTO_DEP} COMMAND ${CMAKE_COMMAND} -E remove_directory ${BINARY_DIR} COMMAND ${CMAKE_COMMAND} -E make_directory ${BINARY_DIR} COMMAND ${CMAKE_COMMAND} -E remove_directory ${STAMP_DIR} @@ -602,7 +611,7 @@ if (CLANG_ENABLE_BOOTSTRAP) ) ExternalProject_Add(bootstrap - DEPENDS clang + DEPENDS clang ${LTO_DEP} PREFIX bootstrap SOURCE_DIR ${CMAKE_SOURCE_DIR} STAMP_DIR ${STAMP_DIR} @@ -615,6 +624,8 @@ if (CLANG_ENABLE_BOOTSTRAP) ${CLANG_BOOTSTRAP_CMAKE_ARGS} -DCMAKE_CXX_COMPILER=${CMAKE_BINARY_DIR}/bin/clang++ -DCMAKE_C_COMPILER=${CMAKE_BINARY_DIR}/bin/clang + -DCMAKE_ASM_COMPILER=${CMAKE_BINARY_DIR}/bin/clang + ${LTO_LIBRARY} ${LTO_AR} ${LTO_RANLIB} INSTALL_COMMAND "" STEP_TARGETS configure build ${cmake_3_4_USES_TERMINAL_OPTIONS} |