47b63cd508
Previously, we only saved those members of thin archives into a repro file that were actually used during linking. However, -ObjC handling requires us to inspect all members, even those that don't end up being loaded. We weren't handling missing members correctly and crashed with an "unhandled `Error`" failure in LLVM_ENABLE_ABI_BREAKING_CHECKS builds. To fix this, we now eagerly load all object files and warn when encountering missing members (in the instances where it wasn't a hard error before). To avoid having to patch out the checks when dealing with older repro files, the `--no-warn-thin-archive-missing-members` flag is added as an escape hatch.
The LLVM Compiler Infrastructure
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.
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