external/argon2/0001-Fix-possible-compiler-error-due-to-undefined-_MSC_VE.patch

   1 From 48829f87ebafbb9938d23a8f0bff4d11d770690e Mon Sep 17 00:00:00 2001
   2 From: Patrick Steinhardt <ps@pks.im>
   3 Date: Thu, 20 Feb 2020 17:37:32 +0100
   4 Subject: [PATCH] Fix possible compiler error due to undefined _MSC_VER
   5
   6 In order to determine how to set up the ARGON2_PUBLIC and ARGON2_LOCAL
   7 macros, we check for various different environments via preprocessor
   8 defines. For Microsoft Visual Studio, we check that the macro _MSC_VER
   9 evaluates to non-zero via `#elif _MSC_VER`. This may raise a compile
  10 error when compiling with "-Werror=undef" if the variable isn't defined.
  11
  12 Fix the issue by using `#elif defined(_MSC_VER)` instead.
  13 ---
  14  include/argon2.h | 2 +-
  15  1 file changed, 1 insertion(+), 1 deletion(-)
  16
  17 diff --git a/include/argon2.h b/include/argon2.h
  18 index fc8682c..1b471f6 100644
  19 --- a/include/argon2.h
  20 +++ b/include/argon2.h
  21 @@ -30,7 +30,7 @@ extern "C" {
  22  #ifdef A2_VISCTL
  23  #define ARGON2_PUBLIC __attribute__((visibility("default")))
  24  #define ARGON2_LOCAL __attribute__ ((visibility ("hidden")))
  25 -#elif _MSC_VER
  26 +#elif defined(_MSC_VER)
  27  #define ARGON2_PUBLIC __declspec(dllexport)
  28  #define ARGON2_LOCAL
  29  #else
  30 --
  31 2.43.0
  32