Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/lib/Support/Errno.cpp

@@ -1,76 +0,0 @@
-//===- Errno.cpp - errno support --------------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the errno wrappers.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Support/Errno.h"
-#include "llvm/Config/config.h" // Get autoconf configuration settings
-#include "llvm/Support/raw_ostream.h"
-#include <string.h>
-
-#if HAVE_ERRNO_H
-#include <errno.h>
-#endif
-
-//===----------------------------------------------------------------------===//
-//=== WARNING: Implementation here must contain only TRULY operating system
-//===          independent code.
-//===----------------------------------------------------------------------===//
-
-namespace llvm {
-namespace sys {
-
-#if HAVE_ERRNO_H
-std::string StrError() {
-  return StrError(errno);
-}
-#endif  // HAVE_ERRNO_H
-
-std::string StrError(int errnum) {
-  std::string str;
-  if (errnum == 0)
-    return str;
-#if defined(HAVE_STRERROR_R) || HAVE_DECL_STRERROR_S
-  const int MaxErrStrLen = 2000;
-  char buffer[MaxErrStrLen];
-  buffer[0] = '\0';
-#endif  
-
-#ifdef HAVE_STRERROR_R
-  // strerror_r is thread-safe.
-#if defined(__GLIBC__) && defined(_GNU_SOURCE)
-  // glibc defines its own incompatible version of strerror_r
-  // which may not use the buffer supplied.
-  str = strerror_r(errnum, buffer, MaxErrStrLen - 1);
-#else
-  strerror_r(errnum, buffer, MaxErrStrLen - 1);
-  str = buffer;
-#endif
-#elif HAVE_DECL_STRERROR_S // "Windows Secure API"
-  strerror_s(buffer, MaxErrStrLen - 1, errnum);
-  str = buffer;
-#elif defined(HAVE_STRERROR)
-  // Copy the thread un-safe result of strerror into
-  // the buffer as fast as possible to minimize impact
-  // of collision of strerror in multiple threads.
-  str = strerror(errnum);
-#else
-  // Strange that this system doesn't even have strerror
-  // but, oh well, just use a generic message
-  raw_string_ostream stream(str);
-  stream << "Error #" << errnum;
-  stream.flush();
-#endif
-  return str;
-}
-
-}  // namespace sys
-}  // namespace llvm