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-rw-r--r--compat/linkage-macros.hpp20
1 files changed, 11 insertions, 9 deletions
diff --git a/compat/linkage-macros.hpp b/compat/linkage-macros.hpp
index 64c64bdb..f4d0104b 100644
--- a/compat/linkage-macros.hpp
+++ b/compat/linkage-macros.hpp
@@ -1,14 +1,16 @@
#pragma once
-#if defined _MSC_VER
-# define OTR_GENERIC_EXPORT __declspec(dllexport)
-# define OTR_GENERIC_IMPORT __declspec(dllimport)
-#elif defined _WIN32 && !defined __WINE__
-# define OTR_GENERIC_EXPORT __attribute__((dllexport, visibility ("default")))
-# define OTR_GENERIC_IMPORT __attribute__((dllimport))
-#else
-# define OTR_GENERIC_EXPORT __attribute__((visibility ("default")))
-# define OTR_GENERIC_IMPORT
+#ifndef OTR_GENERIC_EXPORT
+# if defined _MSC_VER
+# define OTR_GENERIC_EXPORT __declspec(dllexport)
+# define OTR_GENERIC_IMPORT __declspec(dllimport)
+# elif defined _WIN32 && !defined __WINE__
+# define OTR_GENERIC_EXPORT __attribute__((dllexport, visibility ("default")))
+# define OTR_GENERIC_IMPORT __attribute__((dllimport))
+# else
+# define OTR_GENERIC_EXPORT __attribute__((visibility ("default")))
+# define OTR_GENERIC_IMPORT
+# endif
#endif
#if defined __APPLE__ || defined __MINGW32__