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[cmake] Enable users to specify archive creation commands 

This diff enables users to override CMAKE_C_ARCHIVE_CREATE & CMAKE_CXX_ARCHIVE_CREATE
(currently set in HandleLLVMOptions.cmake).

For example, one can specify
cmake -DCMAKE_C_ARCHIVE_CREATE="<CMAKE_AR> TDqc <TARGET> <LINK_FLAGS> <OBJECTS>" \
      -DCMAKE_CXX_ARCHIVE_CREATE="<CMAKE_AR> TDqc <TARGET> <LINK_FLAGS> <OBJECTS>" ...
to make the build create thin archives instead of regular ones.
For a clean run `ninja lld` using thin archives seems to reduce the size
of the build directory from ~14GB to ~8GB

Differential revision: https://reviews.llvm.org/D116850
This commit is contained in:
Alexander Shaposhnikov 2022-01-10 18:53:31 +00:00
parent 0ba4e4b500
commit 2d3ae6f484
1 changed files with 4 additions and 2 deletions
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6
llvm/cmake/modules/HandleLLVMOptions.cmake
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@ -189,11 +189,13 @@ if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
ERROR_QUIET
)
if(${RANLIB_RESULT} EQUAL 0)
set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> Dqc <TARGET> <LINK_FLAGS> <OBJECTS>")
set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> Dqc <TARGET> <LINK_FLAGS> <OBJECTS>"
CACHE STRING "archive create command")
set(CMAKE_C_ARCHIVE_APPEND "<CMAKE_AR> Dq <TARGET> <LINK_FLAGS> <OBJECTS>")
set(CMAKE_C_ARCHIVE_FINISH "<CMAKE_RANLIB> -D <TARGET>")
set(CMAKE_CXX_ARCHIVE_CREATE "<CMAKE_AR> Dqc <TARGET> <LINK_FLAGS> <OBJECTS>")
set(CMAKE_CXX_ARCHIVE_CREATE "<CMAKE_AR> Dqc <TARGET> <LINK_FLAGS> <OBJECTS>"
CACHE STRING "archive create command")
set(CMAKE_CXX_ARCHIVE_APPEND "<CMAKE_AR> Dq <TARGET> <LINK_FLAGS> <OBJECTS>")
set(CMAKE_CXX_ARCHIVE_FINISH "<CMAKE_RANLIB> -D <TARGET>")
endif()