[all-commits] [llvm/llvm-project] 8b4902: [Compiler-rt][test] Fix circular link dependency b...

[Garvit Gupta via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8b4902300521d4a0980d9d35210c02b405f0df86
      https://github.com/llvm/llvm-project/commit/8b4902300521d4a0980d9d35210c02b405f0df86
  Author: Garvit Gupta <garvgupt at qti.qualcomm.com>
  Date:   2026-06-09 (Tue, 09 Jun 2026)

  Changed paths:
    M compiler-rt/test/builtins/Unit/lit.cfg.py

  Log Message:
  -----------
  [Compiler-rt][test] Fix circular link dependency between builtins and libc (#199482)

Currently, the link order is `libclang_rt.builtins.a -lc -lm`. Builtins
are scanned first after which symbols like `abort` are unresolved
references that are resolved through libc.a. However, resolving the
references to these symbols further lead to undefined references to
`_aeabi_uldivmod` etc. that can only resolved through builtins.
Reversing the order also wont fix the issue because `libc.a` introduces
`__aeabi_uldivmod` which is resolved by builtins but it introduces
`abort` which can only be resolved libc.a.

This patch fixes this by wrapping the archives in a linker group
(--start-group/--end-group), which instructs the linker to rescan all
archives in the group until no new symbols can be resolved.

This error is exposed only when bfd like linkers are used.



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