[all-commits] [llvm/llvm-project] 381f9a: [libc][NFC] Add dummy errno target to satisfy mixe...

[Siva Chandra via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 381f9affabba647a44412803562b19519fc25611
      https://github.com/llvm/llvm-project/commit/381f9affabba647a44412803562b19519fc25611
  Author: Siva Chandra Reddy <sivachandra at google.com>
  Date:   2021-07-30 (Fri, 30 Jul 2021)

  Changed paths:
    M libc/src/errno/CMakeLists.txt
    A libc/src/errno/dummy_errno.cpp
    A libc/src/errno/dummy_errno.h
    M libc/test/src/errno/CMakeLists.txt

  Log Message:
  -----------
  [libc][NFC] Add dummy errno target to satisfy mixed mode builds.

In mixed mode builds, we should not be including errno as part of
LLVM libc - errno from another library (or the system library) should be
used. But, other entrypoints which use errno list LLVM libc's errno as a
dep ta satisfy the full build mode. So, we add a dummy errno
implementation with empty files to make both mixed mode and full build
mode happy.