[all-commits] [llvm/llvm-project] dd6e7e: [llvm-ar] Add --thin for creating a thin archive

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dd6e7e0d5722d6396f8a0e94146f0b5e50dfa028
      https://github.com/llvm/llvm-project/commit/dd6e7e0d5722d6396f8a0e94146f0b5e50dfa028
  Author: Fangrui Song <i at maskray.me>
  Date:   2022-02-01 (Tue, 01 Feb 2022)

  Changed paths:
    M llvm/docs/CommandGuide/llvm-ar.rst
    M llvm/test/tools/llvm-ar/thin-archive.test
    M llvm/tools/llvm-ar/llvm-ar.cpp

  Log Message:
  -----------
  [llvm-ar] Add --thin for creating a thin archive

In GNU ar (since 2008), the modifier 'T' means creating a thin archive.
In many other ar implementations (FreeBSD, macOS, elfutils, etc), -T
means "allow filename truncation of extracted files", as specified by
X/Open System Interface.

For portability, 'T' with thin archive semantics should be avoided.

See https://sourceware.org/bugzilla/show_bug.cgi?id=28759 binutils 2.38
will deprecate 'T' (without diagnostic) and add --thin.

Reviewed By: jhenderson

Differential Revision: https://reviews.llvm.org/D116979