diff --git a/llvm/lib/Support/Windows/WindowsSupport.h b/llvm/lib/Support/Windows/WindowsSupport.h index 1d1cedcce299..62e20f267aa1 100644 --- a/llvm/lib/Support/Windows/WindowsSupport.h +++ b/llvm/lib/Support/Windows/WindowsSupport.h @@ -19,6 +19,9 @@ //=== is guaranteed to work on *all* Win32 variants. //===----------------------------------------------------------------------===// +#ifndef LLVM_SUPPORT_WINDOWSSUPPORT_H +#define LLVM_SUPPORT_WINDOWSSUPPORT_H + // mingw-w64 tends to define it as 0x0502 in its headers. #undef _WIN32_WINNT #undef _WIN32_IE @@ -178,3 +181,5 @@ std::error_code UTF16ToCurCP(const wchar_t *utf16, size_t utf16_len, } // end namespace windows } // end namespace sys } // end namespace llvm. + +#endif