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From 48829f87ebafbb9938d23a8f0bff4d11d770690e Mon Sep 17 00:00:00 2001
From: Patrick Steinhardt <ps@pks.im>
Date: Thu, 20 Feb 2020 17:37:32 +0100
Subject: [PATCH] Fix possible compiler error due to undefined _MSC_VER
In order to determine how to set up the ARGON2_PUBLIC and ARGON2_LOCAL
macros, we check for various different environments via preprocessor
defines. For Microsoft Visual Studio, we check that the macro _MSC_VER
evaluates to non-zero via `#elif _MSC_VER`. This may raise a compile
error when compiling with "-Werror=undef" if the variable isn't defined.
Fix the issue by using `#elif defined(_MSC_VER)` instead.
---
include/argon2.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/argon2.h b/include/argon2.h
index fc8682c..1b471f6 100644
--- a/include/argon2.h
+++ b/include/argon2.h
@@ -30,7 +30,7 @@ extern "C" {
#ifdef A2_VISCTL
#define ARGON2_PUBLIC __attribute__((visibility("default")))
#define ARGON2_LOCAL __attribute__ ((visibility ("hidden")))
-#elif _MSC_VER
+#elif defined(_MSC_VER)
#define ARGON2_PUBLIC __declspec(dllexport)
#define ARGON2_LOCAL
#else
--
2.43.0
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