File ninvaders-fix-multiple-definitions.patch of Package ninvaders

commit 98cab46bff3ff124bb6428698f9987f87eefc619
Author: lmat dartme18@gmail.com
Date: Mon Jan 2 12:25:28 2023 -0500

Corrected compilation errors

  gcc  -onInvaders globals.o view.o aliens.o ufo.o player.o nInvaders.o -lncurses
  /usr/bin/ld: ufo.o:(.bss+0x6d0): multiple definition of `aliens'; aliens.o:(.bss+0x6d0): first defined here
  /usr/bin/ld: ufo.o:(.bss+0x0): multiple definition of `skill_level'; aliens.o:(.bss+0x0): first defined here
  /usr/bin/ld: ufo.o:(.bss+0x4): multiple definition of `level'; aliens.o:(.bss+0x4): first defined here
  /usr/bin/ld: ufo.o:(.bss+0x8): multiple definition of `weite'; aliens.o:(.bss+0x8): first defined here
  /usr/bin/ld: ufo.o:(.bss+0x20): multiple definition of `bunker'; aliens.o:(.bss+0x20): first defined here
  /usr/bin/ld: ufo.o:(.bss+0x540): multiple definition of `alienBlock'; aliens.o:(.bss+0x540): first defined here
  /usr/bin/ld: ufo.o:(.bss+0x608): multiple definition of `alienshotnum'; aliens.o:(.bss+0x608): first defined here
  /usr/bin/ld: ufo.o:(.bss+0x620): multiple definition of `alienshoty'; aliens.o:(.bss+0x620): first defined here
  /usr/bin/ld: ufo.o:(.bss+0x660): multiple definition of `alienshotx'; aliens.o:(.bss+0x660): first defined here
  /usr/bin/ld: ufo.o:(.bss+0x6a0): multiple definition of `lowest_ship'; aliens.o:(.bss+0x6a0): first defined here
  /usr/bin/ld: ufo.o:(.bss+0x6c8): multiple definition of `shipnum'; aliens.o:(.bss+0x6c8): first defined here
  /usr/bin/ld: player.o:(.bss+0x6f0): multiple definition of `aliens'; aliens.o:(.bss+0x6d0): first defined here
  /usr/bin/ld: player.o:(.bss+0x18): multiple definition of `skill_level'; aliens.o:(.bss+0x0): first defined here
  /usr/bin/ld: player.o:(.bss+0x6e8): multiple definition of `shipnum'; aliens.o:(.bss+0x6c8): first defined here
  /usr/bin/ld: player.o:(.bss+0x1c): multiple definition of `level'; aliens.o:(.bss+0x4): first defined here
  /usr/bin/ld: player.o:(.bss+0x20): multiple definition of `weite'; aliens.o:(.bss+0x8): first defined here
  /usr/bin/ld: player.o:(.bss+0x28): multiple definition of `ufo'; ufo.o:(.bss+0x6e8): first defined here
  /usr/bin/ld: player.o:(.bss+0x40): multiple definition of `bunker'; aliens.o:(.bss+0x20): first defined here
  /usr/bin/ld: player.o:(.bss+0x560): multiple definition of `alienBlock'; aliens.o:(.bss+0x540): first defined here
  /usr/bin/ld: player.o:(.bss+0x628): multiple definition of `alienshotnum'; aliens.o:(.bss+0x608): first defined here
  /usr/bin/ld: player.o:(.bss+0x640): multiple definition of `alienshoty'; aliens.o:(.bss+0x620): first defined here
  /usr/bin/ld: player.o:(.bss+0x680): multiple definition of `alienshotx'; aliens.o:(.bss+0x660): first defined here
  /usr/bin/ld: player.o:(.bss+0x6c0): multiple definition of `lowest_ship'; aliens.o:(.bss+0x6a0): first defined here
  /usr/bin/ld: nInvaders.o:(.bss+0x6f0): multiple definition of `weite'; aliens.o:(.bss+0x8): first defined here
  /usr/bin/ld: nInvaders.o:(.bss+0x6ec): multiple definition of `level'; aliens.o:(.bss+0x4): first defined here
  /usr/bin/ld: nInvaders.o:(.bss+0x6e8): multiple definition of `skill_level'; aliens.o:(.bss+0x0): first defined here
  /usr/bin/ld: nInvaders.o:(.bss+0x6c8): multiple definition of `shipnum'; aliens.o:(.bss+0x6c8): first defined here
  /usr/bin/ld: nInvaders.o:(.bss+0x18): multiple definition of `ufo'; ufo.o:(.bss+0x6e8): first defined here
  /usr/bin/ld: nInvaders.o:(.bss+0x20): multiple definition of `bunker'; aliens.o:(.bss+0x20): first defined here
  /usr/bin/ld: nInvaders.o:(.bss+0x540): multiple definition of `alienBlock'; aliens.o:(.bss+0x540): first defined here
  /usr/bin/ld: nInvaders.o:(.bss+0x608): multiple definition of `alienshotnum'; aliens.o:(.bss+0x608): first defined here
  /usr/bin/ld: nInvaders.o:(.bss+0x620): multiple definition of `alienshoty'; aliens.o:(.bss+0x620): first defined here
  /usr/bin/ld: nInvaders.o:(.bss+0x660): multiple definition of `alienshotx'; aliens.o:(.bss+0x660): first defined here
  /usr/bin/ld: nInvaders.o:(.bss+0x6a0): multiple definition of `lowest_ship'; aliens.o:(.bss+0x6a0): first defined here
  /usr/bin/ld: nInvaders.o:(.bss+0x6d0): multiple definition of `aliens'; aliens.o:(.bss+0x6d0): first defined here
  collect2: error: ld returned 1 exit status
  make: *** [Makefile:11: nInvaders] Error 1

---
Index: ninvaders-0.1.1/aliens.c
===================================================================
--- ninvaders-0.1.1.orig/aliens.c
+++ ninvaders-0.1.1/aliens.c
@@ -26,6 +26,19 @@
 #include "player.h"
 #include "nInvaders.h"
 
+Aliens aliens;
+
+int shipnum;
+
+// todo: move to structure
+int lowest_ship[ALIENS_MAX_NUMBER_X];
+int alienshotx[ALIENS_MAX_MISSILES];
+int alienshoty[ALIENS_MAX_MISSILES];
+int alienshotnum;
+int alienBlock[ALIENS_MAX_NUMBER_Y][ALIENS_MAX_NUMBER_X];
+
+int bunker[BUNKERHEIGHT][BUNKERWIDTH + 1];
+
 /**
  * initialize aliens attributes
  */
Index: ninvaders-0.1.1/aliens.h
===================================================================
--- ninvaders-0.1.1.orig/aliens.h
+++ ninvaders-0.1.1/aliens.h
@@ -38,22 +38,22 @@ struct Aliens {
 	int speed;	  // 0: no movement; 1: one per turn; etc.
 };
 	
-Aliens aliens;
+extern Aliens aliens;
 		
-int shipnum;	
+extern int shipnum;	
 
 #define ALIENS_MAX_NUMBER_X 10
 #define ALIENS_MAX_NUMBER_Y 5	
 #define ALIENS_MAX_MISSILES 10	
 
 // todo: move to structure
-int lowest_ship[ALIENS_MAX_NUMBER_X];
-int alienshotx[ALIENS_MAX_MISSILES];
-int alienshoty[ALIENS_MAX_MISSILES];
-int alienshotnum;
-int alienBlock[ALIENS_MAX_NUMBER_Y][ALIENS_MAX_NUMBER_X];
+extern int lowest_ship[ALIENS_MAX_NUMBER_X];
+extern int alienshotx[ALIENS_MAX_MISSILES];
+extern int alienshoty[ALIENS_MAX_MISSILES];
+extern int alienshotnum;
+extern int alienBlock[ALIENS_MAX_NUMBER_Y][ALIENS_MAX_NUMBER_X];
 
-int bunker[BUNKERHEIGHT][BUNKERWIDTH + 1];	
+extern int bunker[BUNKERHEIGHT][BUNKERWIDTH + 1];	
 
 
 void aliensReset();
Index: ninvaders-0.1.1/nInvaders.c
===================================================================
--- ninvaders-0.1.1.orig/nInvaders.c
+++ ninvaders-0.1.1/nInvaders.c
@@ -32,6 +32,11 @@
 
 #define FPS 50
 
+// todo: let's try to not having to declare these "public"
+int weite;
+int level;
+int skill_level;
+
 int lives;
 long score;
 int status; // status handled in timer
Index: ninvaders-0.1.1/nInvaders.h
===================================================================
--- ninvaders-0.1.1.orig/nInvaders.h
+++ ninvaders-0.1.1/nInvaders.h
@@ -46,9 +46,9 @@ void drawscore();
 void doScoring(int alienType);
 
 // todo: let's try to not having to declare these "public"
-int weite;
-int level;
-int skill_level;
+extern int weite;
+extern int level;
+extern int skill_level;
 	
 // included from globals.h
 extern void doSleep();
Index: ninvaders-0.1.1/ufo.c
===================================================================
--- ninvaders-0.1.1.orig/ufo.c
+++ ninvaders-0.1.1/ufo.c
@@ -27,6 +27,7 @@
 #include "nInvaders.h"
 
 static int fShowUfo = 0;
+Ufo ufo;
 
 /**
  * initialize ufo attributes
Index: ninvaders-0.1.1/ufo.h
===================================================================
--- ninvaders-0.1.1.orig/ufo.h
+++ ninvaders-0.1.1/ufo.h
@@ -34,7 +34,7 @@ struct Ufo {
 	int posY;	  // vertical position of aliens
 };
 	
-Ufo ufo;
+extern Ufo ufo;
 
 void ufoReset();
 int ufoShowUfo();