[flang-commits] [PATCH] D132481: [flang] [runtime] Fix build warnings if built with mingw

[Martin Storsjö via Phabricator via flang-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rG770685e24d31: [flang] [runtime] Fix build warnings if built with mingw (authored by mstorsjo).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D132481/new/

https://reviews.llvm.org/D132481

Files:
  flang/runtime/file.cpp


Index: flang/runtime/file.cpp
===================================================================
--- flang/runtime/file.cpp
+++ flang/runtime/file.cpp
@@ -426,10 +426,12 @@
 
 bool IsATerminal(int fd) { return ::isatty(fd); }
 
-#ifdef WIN32
+#if defined(_WIN32) && !defined(F_OK)
 // Access flags are normally defined in unistd.h, which unavailable under
 // Windows. Instead, define the flags as documented at
 // https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/access-waccess
+// On Mingw, io.h does define these same constants - so check whether they
+// already are defined before defining these.
 #define F_OK 00
 #define W_OK 02
 #define R_OK 04


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