From ff5221b693893eab4f312597b8d507beb178eda8 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@zeitlins.org>
Date: Thu, 6 May 2021 22:33:41 +0100
Subject: [PATCH] Fix warning about testing _WIN64 which might be undefined

This warning is disabled by default, but is pretty useful and worth
enabling for MSVC, just as -Wundef for gcc, so fix it in Win32 build.
---
 include/spdlog/details/os-inl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/spdlog/details/os-inl.h b/include/spdlog/details/os-inl.h
index 4ed0fa69..6df89565 100644
--- a/include/spdlog/details/os-inl.h
+++ b/include/spdlog/details/os-inl.h
@@ -214,7 +214,7 @@ SPDLOG_INLINE size_t filesize(FILE *f)
     }
 #if defined(_WIN32) && !defined(__CYGWIN__)
     int fd = ::_fileno(f);
-#if _WIN64 // 64 bits
+#if defined(_WIN64) // 64 bits
     __int64 ret = ::_filelengthi64(fd);
     if (ret >= 0)
     {