Skip to content

release/21.x: [CMake][Release] Build with -ffat-lto-objects (#140381) #151245

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 2 commits into
base: release/21.x
Choose a base branch
from
Open

release/21.x: [CMake][Release] Build with -ffat-lto-objects (#140381) #151245

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
ab1d181
[CMake][Release] Build with -ffat-lto-objects (#140381)
tstellar Jul 29, 2025
3fd2c4f
Merge branch 'release/21.x' into issue140381
tstellar Aug 11, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 5 additions & 1 deletion clang/cmake/caches/Release.cmake
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -102,7 +102,7 @@ if (LLVM_RELEASE_ENABLE_LTO)
# FIXME: We can't use LLVM_ENABLE_LTO=Thin here, because it causes the CMake
# step for the libcxx build to fail. CMAKE_INTERPROCEDURAL_OPTIMIZATION does
# enable ThinLTO, though.
set(RUNTIMES_CMAKE_ARGS "-DCMAKE_INTERPROCEDURAL_OPTIMIZATION=ON -DLLVM_ENABLE_LLD=ON" CACHE STRING "")
set(RUNTIMES_CMAKE_ARGS "-DCMAKE_INTERPROCEDURAL_OPTIMIZATION=ON -DLLVM_ENABLE_LLD=ON -DLLVM_ENABLE_FATLTO=ON" CACHE STRING "")
endif()

# Stage 1 Common Config
Expand Down Expand Up @@ -144,3 +144,7 @@ set_final_stage_var(CPACK_GENERATOR "TXZ" STRING)
set_final_stage_var(CPACK_ARCHIVE_THREADS "0" STRING)

set_final_stage_var(LLVM_USE_STATIC_ZSTD "ON" BOOL)
if (LLVM_RELEASE_ENABLE_LTO)
set_final_stage_var(LLVM_ENABLE_FATLTO "ON" BOOL)
set_final_stage_var(CPACK_PRE_BUILD_SCRIPTS "${CMAKE_CURRENT_LIST_DIR}/release_cpack_pre_build_strip_lto.cmake" STRING)
endif()
5 changes: 5 additions & 0 deletions clang/cmake/caches/release_cpack_pre_build_strip_lto.cmake
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
file(GLOB files ${CPACK_TEMPORARY_INSTALL_DIRECTORY}/lib/*.a)

foreach(file ${files})
execute_process(COMMAND ${CPACK_TEMPORARY_INSTALL_DIRECTORY}/bin/llvm-strip --no-strip-all -R .llvm.lto ${file})
endforeach()
Loading