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
See docs/NewLLD.rst