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-rw-r--r--src/zix/common.h18
1 files changed, 10 insertions, 8 deletions
diff --git a/src/zix/common.h b/src/zix/common.h
index 46307b1..54f2303 100644
--- a/src/zix/common.h
+++ b/src/zix/common.h
@@ -12,14 +12,16 @@
*/
/** @cond */
-#if defined(_WIN32) && !defined(ZIX_STATIC) && defined(ZIX_INTERNAL)
-# define ZIX_API __declspec(dllexport)
-#elif defined(_WIN32) && !defined(ZIX_STATIC)
-# define ZIX_API __declspec(dllimport)
-#elif defined(__GNUC__)
-# define ZIX_API __attribute__((visibility("default")))
-#else
-# define ZIX_API
+#ifndef ZIX_API
+# if defined(_WIN32) && !defined(ZIX_STATIC) && defined(ZIX_INTERNAL)
+# define ZIX_API __declspec(dllexport)
+# elif defined(_WIN32) && !defined(ZIX_STATIC)
+# define ZIX_API __declspec(dllimport)
+# elif defined(__GNUC__)
+# define ZIX_API __attribute__((visibility("default")))
+# else
+# define ZIX_API
+# endif
#endif
#ifdef __GNUC__