[all-commits] [llvm/llvm-project] ed07e1: [SystemZ/ZOS] Add header file to encapsulate use o...

[Kai Nacke via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: ed07e1fe0ffdb2c1dbff26ff4cf7558e0c419737
      https://github.com/llvm/llvm-project/commit/ed07e1fe0ffdb2c1dbff26ff4cf7558e0c419737
  Author: Kai Nacke <kai.nacke at de.ibm.com>
  Date:   2020-08-26 (Wed, 26 Aug 2020)

  Changed paths:
    M clang/lib/Driver/Driver.cpp
    M llvm/cmake/config-ix.cmake
    M llvm/include/llvm/Config/config.h.cmake
    A llvm/include/llvm/Support/ExitCodes.h
    M llvm/lib/Support/CrashRecoveryContext.cpp
    M llvm/lib/Support/Unix/Signals.inc

  Log Message:
  -----------
  [SystemZ/ZOS] Add header file to encapsulate use of <sysexits.h>

The non-standard header file `<sysexits.h>` provides some return values.
`EX_IOERR` is used to as a special value to signal a broken pipe to the clang driver.
On z/OS Unix System Services, this header file does not exists. This patch

- adds a check for `<sysexits.h>`, removing the dependency on `LLVM_ON_UNIX`
- adds a new header file `llvm/Support/ExitCodes`, which either includes
  `<sysexits.h>` or defines `EX_IOERR`
- updates the users of `EX_IOERR` to include the new header file

Reviewed By: hubert.reinterpretcast

Differential Revision: https://reviews.llvm.org/D83472