diff options
| author | Peter Collingbourne <peter@pcc.me.uk> | 2017-03-15 16:28:43 +0000 |
|---|---|---|
| committer | Peter Collingbourne <peter@pcc.me.uk> | 2017-03-15 16:28:43 +0000 |
| commit | 603d3c6be1966c7a2fef4886d94eb668adf68581 (patch) | |
| tree | 52875fd7b62eb791ecee1cef4b1331b64d0ff2f5 /cmake | |
| parent | cbe96ddc5f952c02abf6109d313f7cf19e4f054e (diff) | |
Re-apply r296730, "cmake: Configure the ThinLTO cache directory when using ELF lld or gold."
All known cache-related bugs observed when self hosting have been fixed (r296907
and r297853).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297854 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'cmake')
| -rw-r--r-- | cmake/modules/HandleLLVMOptions.cmake | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake index d776285b80fe..8d9051cfdd7c 100644 --- a/cmake/modules/HandleLLVMOptions.cmake +++ b/cmake/modules/HandleLLVMOptions.cmake @@ -715,11 +715,20 @@ if(uppercase_LLVM_ENABLE_LTO STREQUAL "THIN") if(NOT LINKER_IS_LLD_LINK) append("-flto=thin" CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) endif() - # On darwin, enable the lto cache. This improves initial build time a little - # since we re-link a lot of the same objects, and significantly improves - # incremental build time. - append_if(APPLE "-Wl,-cache_path_lto,${PROJECT_BINARY_DIR}/lto.cache" - CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) + # If the linker supports it, enable the lto cache. This improves initial build + # time a little since we re-link a lot of the same objects, and significantly + # improves incremental build time. + # FIXME: We should move all this logic into the clang driver. + if(APPLE) + append("-Wl,-cache_path_lto,${PROJECT_BINARY_DIR}/lto.cache" + CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) + elseif(UNIX AND LLVM_USE_LINKER STREQUAL "lld") + append("-Wl,--thinlto-cache-dir=${PROJECT_BINARY_DIR}/lto.cache" + CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) + elseif(LLVM_USE_LINKER STREQUAL "gold") + append("-Wl,--plugin-opt,cache-dir=${PROJECT_BINARY_DIR}/lto.cache" + CMAKE_EXE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS) + endif() elseif(uppercase_LLVM_ENABLE_LTO STREQUAL "FULL") append("-flto=full" CMAKE_CXX_FLAGS CMAKE_C_FLAGS) if(NOT LINKER_IS_LLD_LINK) |