[all-commits] [llvm/llvm-project] e0bd48: [docs] Pass -c when generating a PCH file (#226850)

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e0bd48983e9d1d0de471a7689573622464c0b332
      https://github.com/llvm/llvm-project/commit/e0bd48983e9d1d0de471a7689573622464c0b332
  Author: Fangrui Song <i at maskray.me>
  Date:   2026-09-29 (Tue, 29 Sep 2026)

  Changed paths:
    M clang/docs/LibASTImporter.md
    M clang/docs/UsersManual.md

  Log Message:
  -----------
  [docs] Pass -c when generating a PCH file (#226850)

Without options like -fsyntax-only/-E/-S/-c, the driver runs in link
mode, and a header-only command line produces a PCH only incidentally: a
linker option such as -lm or -Wl,..., including one from a config file,
adds a link job. Use -c in the PCH examples.

Also fix two broken examples: -ignore-pch is a driver option (cc1
rejects -Xclang -ignore-pch), and the relocatable PCH example is
missing -o. In LibASTImporter.md, generate the C++ AST files with
-emit-ast instead of treating .cpp files as headers.

LLM-aided



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications