[PATCH] D89942: Disable LTO and LLD for bootstrap builds on systems unsupported by LLD

[Timm Bäder via Phabricator via cfe-commits]

tbaeder added a comment.

Including `CMakeDetermineSystem` gives me:

  loading initial cache file ../clang/cmake/caches/3-stage.cmake
  CMake Error: Could not open file for write in copy operation /CMakeSystem.cmake.tmp
  CMake Error: : System Error: Permission denied
  CMake Error at /usr/share/cmake/Modules/CMakeDetermineSystem.cmake:185 (configure_file):
    configure_file Problem configuring file
  Call Stack (most recent call first):
    /home/tbaeder/llvm-project/clang/cmake/caches/3-stage-base.cmake:2 (include)
    /home/tbaeder/llvm-project/clang/cmake/caches/3-stage.cmake:16 (include)

but also sets `CMAKE_HOST_SYSTEM_PROCESSOR`, which is just `uname -m` on Linux it seems.

The other variables printed from your snippet do not seem very useful in this case:

  -- CLANG_BOOTSTRAP_TARGETS=clang;check-all;check-llvm;check-clang;test-suite;stage3;stage3-clang;stage3-check-all;stage3-check-llvm;stage3-check-clang;stage3-test-suite
  -- CMAKE_BINARY_DIR=/home/tbaeder/llvm-project/build-stage3
  -- CMAKE_COMMAND=/usr/bin/cmake
  -- CMAKE_CPACK_COMMAND=/usr/bin/cpack
  -- CMAKE_CTEST_COMMAND=/usr/bin/ctest
  -- CMAKE_CURRENT_BINARY_DIR=/home/tbaeder/llvm-project/build-stage3
  -- CMAKE_CURRENT_LIST_DIR=/home/tbaeder/llvm-project/clang/cmake/caches
  -- CMAKE_CURRENT_LIST_FILE=/home/tbaeder/llvm-project/clang/cmake/caches/3-stage-base.cmake
  -- CMAKE_CURRENT_SOURCE_DIR=/home/tbaeder/llvm-project/llvm
  -- CMAKE_FILES_DIRECTORY=/CMakeFiles
  -- CMAKE_HOST_SYSTEM_NAME=Linux
  -- CMAKE_HOST_UNIX=1
  -- CMAKE_MAJOR_VERSION=3
  -- CMAKE_MINOR_VERSION=17
  -- CMAKE_PARENT_LIST_FILE=/home/tbaeder/llvm-project/clang/cmake/caches/3-stage.cmake
  -- CMAKE_PATCH_VERSION=4
  -- CMAKE_ROOT=/usr/share/cmake
  -- CMAKE_SOURCE_DIR=/home/tbaeder/llvm-project/llvm
  -- CMAKE_TWEAK_VERSION=0
  -- CMAKE_VERSION=3.17.4
  -- LLVM_TARGETS_TO_BUILD=Native
  -- UNIX=1


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