7b6a89f346
Some linker scripts don't converge. https://reviews.llvm.org/D66279 ("[ELF] Make LinkerScript::assignAddresses iterative") detected convergence of symbol assignments. This patch detects convergence of output section addresses. While input sections might also have convergence issues, they are less common as expressions that could cause convergence issues typically involve output sections and symbol assignments. GNU ld has an error `non constant or forward reference address expression for section` that correctly rejects ``` SECTIONS { .text ADDR(.data)+0x1000 : { *(.text) } .data : { *(.data) } } ``` but not the following variant: ``` SECTIONS { .text foo : { *(.text) } .data : { *(.data) } foo = ADDR(.data)+0x1000; } ``` Our approach consistently rejects both cases. Link: https://discourse.llvm.org/t/lld-and-layout-convergence/79232 Pull Request: https://github.com/llvm/llvm-project/pull/93888
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.
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