[all-commits] [llvm/llvm-project] 968b6a: [libc][hdrgen] Print __BEGIN_C_DECLS / __END_C_DEC...

[Alexey Samsonov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 968b6aaef1c543e126d8f63bcdadea1e8164d8b6
      https://github.com/llvm/llvm-project/commit/968b6aaef1c543e126d8f63bcdadea1e8164d8b6
  Author: Alexey Samsonov <vonosmas at gmail.com>
  Date:   2026-03-26 (Thu, 26 Mar 2026)

  Changed paths:
    M libc/utils/hdrgen/hdrgen/header.py
    A libc/utils/hdrgen/tests/expected_output/macro_only.h
    A libc/utils/hdrgen/tests/input/macro_only.yaml
    M libc/utils/hdrgen/tests/test_integration.py

  Log Message:
  -----------
  [libc][hdrgen] Print __BEGIN_C_DECLS / __END_C_DECLS conditionally. (#188830)

Clean up the `%public_api` printer code slightly - get rid of explicit
`\n` and ensure we only print `__BEGIN_C_DECLS` and `__END_C_DECLS` if
the generated header actually contains functions or objects to declare.

I've noticed that after 27ba9e2a44c11f8123528c350227db2c9a707c8f landed,
generated errno.h header has two blocks of `__BEGIN_C_DECLS` /
`__END_C_DECLS`: an empty one was generated automatically from
`%public_api` section that was intended to only add the `errno_t` type
declaration.



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