[PATCH] D151718: Remove HAVE_STRERROR

[Fangrui Song via Phabricator via llvm-commits]

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Most systems support strerror_r. For the remaining systems strerror_s and
strerror can be used as fallbacks. We don't have a supported operating
system/compiler that doesn't provide `strerror`.

Close https://github.com/llvm/llvm-project/issues/62804

https://github.com/flang-compiler/f18/pull/1068 added a fallback
when strerror is unavailable, but I think the code path is dead.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D151718

Files:
  flang/runtime/CMakeLists.txt
  flang/runtime/io-error.cpp
  llvm/cmake/config-ix.cmake
  llvm/include/llvm/Config/config.h.cmake
  llvm/lib/Support/Errno.cpp
  llvm/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
  utils/bazel/llvm-project-overlay/llvm/include/llvm/Config/config.h
  utils/bazel/llvm_configs/config.h.cmake

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