diff -up cdogs-sdl-0.7.3/src/cdogs/log.c~ cdogs-sdl-0.7.3/src/cdogs/log.c
--- cdogs-sdl-0.7.3/src/cdogs/log.c~	2020-01-01 01:04:04.000000000 +0100
+++ cdogs-sdl-0.7.3/src/cdogs/log.c	2020-02-24 23:20:51.856239948 +0100
@@ -52,6 +52,7 @@ static LogModuleInfo sModuleInfo[] =
 	{ LL_INFO, "PATH" },
 };
 
+FILE *gLogFile;
 
 const char *LogModuleName(const LogModule m)
 {
diff -up cdogs-sdl-0.7.3/src/cdogs/log.h~ cdogs-sdl-0.7.3/src/cdogs/log.h
--- cdogs-sdl-0.7.3/src/cdogs/log.h~	2020-01-01 01:04:04.000000000 +0100
+++ cdogs-sdl-0.7.3/src/cdogs/log.h	2020-02-24 23:19:06.926684782 +0100
@@ -61,7 +61,7 @@ void LogModuleSetLevel(const LogModule m
 const char *LogLevelName(const LogLevel l);
 LogLevel StrLogLevel(const char *s);
 
-FILE *gLogFile;
+extern FILE *gLogFile;
 void LogInit(void);
 void LogOpenFile(const char *filename);
 void LogTerminate(void);