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[CMake] Use LLVM tools external project build where possible

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This reduces the reliance on host tools and makes the build more
hermetic. Some of the runtimes already assume that certain tools are
always available, for example libc++ and libc++abi archive merging
relies on ar to extract files out of the archive, even on Darwin.

Differential Revision: https://reviews.llvm.org/D74107
This commit is contained in:
Petr Hosek 2020-02-05 19:37:50 -08:00
parent 9c1c825b72
commit fdfdd275fd
1 changed files with 11 additions and 9 deletions
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20
llvm/cmake/modules/LLVMExternalProjectUtils.cmake
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@ -45,10 +45,18 @@ function(llvm_ExternalProject_Add name source_dir)
"CMAKE_ARGS;TOOLCHAIN_TOOLS;RUNTIME_LIBRARIES;DEPENDS;EXTRA_TARGETS;PASSTHROUGH_PREFIXES;STRIP_TOOL"
${ARGN})
canonicalize_tool_name(${name} nameCanon)
foreach(arg ${ARG_CMAKE_ARGS})
if(arg MATCHES "^-DCMAKE_SYSTEM_NAME=")
string(REGEX REPLACE "^-DCMAKE_SYSTEM_NAME=(.*)$" "\\1" _cmake_system_name "${arg}")
endif()
endforeach()
if(NOT ARG_TOOLCHAIN_TOOLS)
set(ARG_TOOLCHAIN_TOOLS clang lld)
if(NOT APPLE AND NOT WIN32)
list(APPEND ARG_TOOLCHAIN_TOOLS llvm-ar llvm-lipo llvm-ranlib llvm-nm llvm-objcopy llvm-objdump llvm-strip)
set(ARG_TOOLCHAIN_TOOLS clang lld llvm-ar llvm-lipo llvm-ranlib llvm-nm llvm-objdump)
if(NOT _cmake_system_name STREQUAL Darwin)
# TODO: These tools don't fully support Mach-O format yet.
list(APPEND ARG_TOOLCHAIN_TOOLS llvm-objcopy llvm-strip)
endif()
endif()
foreach(tool ${ARG_TOOLCHAIN_TOOLS})
@ -104,12 +112,6 @@ function(llvm_ExternalProject_Add name source_dir)
endforeach()
endforeach()
foreach(arg ${ARG_CMAKE_ARGS})
if(arg MATCHES "^-DCMAKE_SYSTEM_NAME=")
string(REGEX REPLACE "^-DCMAKE_SYSTEM_NAME=(.*)$" "\\1" _cmake_system_name "${arg}")
endif()
endforeach()
if(ARG_USE_TOOLCHAIN AND NOT CMAKE_CROSSCOMPILING)
if(CLANG_IN_TOOLCHAIN)
if(_cmake_system_name STREQUAL Windows)