Fix for -fno-common
https://gitlab.com/LibreGames/jumpnbump/-/commit/b72b70a4233776bdaa6a683c89af2becefd53bd6.diff

Index: main.c
--- main.c.orig
+++ main.c
@@ -67,6 +67,8 @@ char cur_pal[768];
 
 int ai[JNB_MAX_PLAYERS];
 
+int endscore_reached = 0;
+
 unsigned int ban_map[17][22] = {
 	{1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
 	{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0},
