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llvm / llvm-project / 070d7af0c56b993806fa47f77b607b1849a2172f
commit070d7af0c56b993806fa47f77b607b1849a2172f[log] [tgz]
authorFangrui Song <i@maskray.me>Wed Mar 27 20:04:59 2024 -0700
committerFangrui Song <i@maskray.me>Wed Mar 27 20:04:59 2024 -0700
tree559bce1d4538befc5797279b6c9e4b544fa2fc05
parent443baed56c770aca050d27581d5d6f0c5c168285 [diff]
[ELF] --export-dynamic: don't create dynamic sections for non-PIC static links

The CloudABI (removed from Clang Driver) change from
https://reviews.llvm.org/D29982 does not make sense. GNU ld and gold
don't create dynamic sections for a non-PIC static link when
--export-dynamic is specified.

Creating dynamic sections is harmful in this scenario because we would
consider undefined weak symbols preemptible and generate GLOB_DAT
relocations, breaking the expectation that non-PIC static links only
contain IRELATIVE relocations.

In addition, there are other options that export symbols
(--export-dynamic-symbol, --dynamic-list, etc). It does not make sense
to special case --export-dynamic.
3 files changed
tree: 559bce1d4538befc5797279b6c9e4b544fa2fc05
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. libc/
  11. libclc/
  12. libcxx/
  13. libcxxabi/
  14. libunwind/
  15. lld/
  16. lldb/
  17. llvm/
  18. llvm-libgcc/
  19. mlir/
  20. openmp/
  21. polly/
  22. pstl/
  23. runtimes/
  24. third-party/
  25. utils/
  26. .clang-format
  27. .clang-tidy
  28. .git-blame-ignore-revs
  29. .gitattributes
  30. .gitignore
  31. .mailmap
  32. CODE_OF_CONDUCT.md
  33. CONTRIBUTING.md
  34. LICENSE.TXT
  35. pyproject.toml
  36. README.md
  37. SECURITY.md
README.md

The LLVM Compiler Infrastructure

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Welcome to the LLVM project!

This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.

The LLVM project has multiple components. The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.

C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.

Other components include: the libc++ C++ standard library, the LLD linker, and more.

Getting the Source Code and Building LLVM

Consult the Getting Started with LLVM page for information on building and running LLVM.

For information on how to contribute to the LLVM project, please take a look at the Contributing to LLVM guide.

Getting in touch

Join the LLVM Discourse forums, Discord chat, LLVM Office Hours or Regular sync-ups.

The LLVM project has adopted a code of conduct for participants to all modes of communication within the project.