fix multiple definitions of tcldot_builtins variables

Similar to preceding commits, this fixes an issue where MinGW was seeing
 __declspec alternatives but implementing GCC semantics and hence treating
declarations as definitions.

diff --git a/tclpkg/tcldot/tcldot_builtins.c b/tclpkg/tcldot/tcldot_builtins.c
index ab71b0871973148e6edbba164e25a1b535d245ad..26e28c6125a31decf9a70527e5f4ccaeedd65373 100644 (file)
--- a/tclpkg/tcldot/tcldot_builtins.c
+++ b/tclpkg/tcldot/tcldot_builtins.c
@@ -13,18 +13,20 @@
 #include <gvc/gvplugin.h>
 
 #if defined(GVDLL) && !defined(ENABLE_LTDL)
-#define extern __declspec(dllimport)
+#define IMPORT __declspec(dllimport)
+#else
+#define IMPORT /* nothing */
 #endif
 
-extern gvplugin_library_t gvplugin_dot_layout_LTX_library;
-extern gvplugin_library_t gvplugin_neato_layout_LTX_library;
+IMPORT extern gvplugin_library_t gvplugin_dot_layout_LTX_library;
+IMPORT extern gvplugin_library_t gvplugin_neato_layout_LTX_library;
 #ifdef HAVE_LIBGD
-extern gvplugin_library_t gvplugin_gd_LTX_library;
+IMPORT extern gvplugin_library_t gvplugin_gd_LTX_library;
 #endif
 #ifdef HAVE_PANGOCAIRO
-extern gvplugin_library_t gvplugin_pango_LTX_library;
+IMPORT extern gvplugin_library_t gvplugin_pango_LTX_library;
 #endif
-extern gvplugin_library_t gvplugin_core_LTX_library;
+IMPORT extern gvplugin_library_t gvplugin_core_LTX_library;
 
 
 lt_symlist_t lt_preloaded_symbols[] = {