From 067c436d83344774aeeb71d7591833f6415f2934 Mon Sep 17 00:00:00 2001
From: Magnus Jacobsson <Magnus.Jacobsson@berotec.se>
Date: Mon, 26 Jul 2021 16:57:20 +0200
Subject: [PATCH] gvc: correct storage-class attribute declarations in gvio.h

Towards https://gitlab.com/graphviz/graphviz/-/issues/2058.
---
 lib/gvc/gvio.h | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/lib/gvc/gvio.h b/lib/gvc/gvio.h
index eaf6fc65e..078e17d07 100644
--- a/lib/gvc/gvio.h
+++ b/lib/gvc/gvio.h
@@ -17,21 +17,15 @@ extern "C" {
 #endif
 
 #ifdef GVDLL
+#ifdef GVC_EXPORTS
 #define GVIO_API __declspec(dllexport)
 #else
-#define GVIO_API
-#endif
-
-/*visual studio*/
-#ifdef _WIN32
-#ifndef GVC_EXPORTS
-#undef GVIO_API
 #define GVIO_API __declspec(dllimport)
 #endif
 #endif
-/*end visual studio*/
+
 #ifndef GVIO_API
-#define GVIO_API extern
+#define GVIO_API /* nothing */
 #endif
 
     GVIO_API size_t gvwrite (GVJ_t * job, const char *s, size_t len);
-- 
2.40.0