Author: cbieneman
Date: Fri Sep 11 15:42:57 2015
New Revision: 247467
URL: http://llvm.org/viewvc/llvm-project?rev=247467&view=rev
Log:
[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.
Modified:
cfe/trunk/CMakeLists.txt
Modified: cfe/trunk/CMakeLists.txt
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/CMakeLists.txt?rev=247467&r1=247466&r2=247467&view=diff
==============================================================================
--- cfe/trunk/CMakeLists.txt (original)
+++ cfe/trunk/CMakeLists.txt Fri Sep 11 15:42:57 2015
@@ -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}
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
