Description: gcc-10 uses -fcommon by default, use extern to unbreak build
Author: Nilesh Patra <npatra974@gmail.com>
Last-Update: 2021-02-19
--- a/bbox.h
+++ b/bbox.h
@@ -26,7 +26,7 @@
 
 #ifdef __BBOX_C__
 
-bounding_box bbox;
+extern bounding_box bbox;
 enum bbox_type bbox_type = AUTOMATIC;
 Widget bbox_dialog = NULL;  /* wjq */
 Widget bbMin[4], bbMax[4];  /* 0:     The whole entry line for Min, Max values,