[llvm] r296730 - cmake: Configure the ThinLTO cache directory when using ELF lld or gold.
Peter Collingbourne via llvm-commits
llvm-commits at lists.llvm.org
Wed Mar 1 19:01:13 PST 2017
Author: pcc
Date: Wed Mar 1 21:01:12 2017
New Revision: 296730
URL: http://llvm.org/viewvc/llvm-project?rev=296730&view=rev
Log:
cmake: Configure the ThinLTO cache directory when using ELF lld or gold.
Differential Revision: https://reviews.llvm.org/D30522
Modified:
llvm/trunk/cmake/modules/HandleLLVMOptions.cmake
Modified: llvm/trunk/cmake/modules/HandleLLVMOptions.cmake
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/cmake/modules/HandleLLVMOptions.cmake?rev=296730&r1=296729&r2=296730&view=diff
==============================================================================
--- llvm/trunk/cmake/modules/HandleLLVMOptions.cmake (original)
+++ llvm/trunk/cmake/modules/HandleLLVMOptions.cmake Wed Mar 1 21:01:12 2017
@@ -715,11 +715,20 @@ if(uppercase_LLVM_ENABLE_LTO STREQUAL "T
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)
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