Add gdb check for configure suggestion on bugreport:4645.

Add the missing update in infinite_warp.txt

configure

@@ -6260,12 +6260,22 @@ case $enable_debug in
 		CPPFLAGS="$CPPFLAGS"
 		;;
 	"yes")
-		CPPFLAGS="$CPPFLAGS -g -DDEBUG"
-		LDFLAGS="$LDFLAGS -g"
+		if test $ac_cv_prog_cc_g = yes; then
+		    CPPFLAGS="$CPPFLAGS -g -DDEBUG"
+		    LDFLAGS="$LDFLAGS -g"
+                else
+		    echo "error: --enable-debug flag=$enable_debug entered but the compiler does not support -g"
+		    exit 1
+                fi
 		;;
 	"gdb")
-		CPPFLAGS="$CPPFLAGS -ggdb -DDEBUG"
-		LDFLAGS="$LDFLAGS -g"
+		if test $ac_cv_prog_cc_g = yes; then
+		    CPPFLAGS="$CPPFLAGS -ggdb -DDEBUG"
+		    LDFLAGS="$LDFLAGS -g"
+		else
+		    echo "error: --enable-debug flag=$enable_debug entered but the compiler does not support -g"
+		    exit 1
+                fi
 		;;
 esac
 

configure.in

@@ -940,12 +940,22 @@ case $enable_debug in
 		CPPFLAGS="$CPPFLAGS"
 		;;
 	"yes")
-		CPPFLAGS="$CPPFLAGS -g -DDEBUG"
-		LDFLAGS="$LDFLAGS -g"
+		if test $ac_cv_prog_cc_g = yes; then
+		    CPPFLAGS="$CPPFLAGS -g -DDEBUG"
+		    LDFLAGS="$LDFLAGS -g"
+                else
+		    echo "error: --enable-debug flag=$enable_debug entered but the compiler does not support -g"
+		    exit 1
+                fi
 		;;
 	"gdb")
-		CPPFLAGS="$CPPFLAGS -ggdb -DDEBUG"
-		LDFLAGS="$LDFLAGS -g"
+		if test $ac_cv_prog_cc_g = yes; then
+		    CPPFLAGS="$CPPFLAGS -ggdb -DDEBUG"
+		    LDFLAGS="$LDFLAGS -g"
+		else
+		    echo "error: --enable-debug flag=$enable_debug entered but the compiler does not support -g"
+		    exit 1
+                fi
 		;;
 esac
 

npc/test/infinite_warp.txt

@@ -8,6 +8,15 @@
 //= Tests infinite warp loop prevention.
 //============================================================
 
-e_tower,74,116,0	warp	#inf_warp1	2,2,e_tower,81,108
-e_tower,81,108,0	warp	#inf_warp2	2,2,e_tower,75,84
-e_tower,75,84,0	warp	#inf_warp3	2,2,e_tower,74,116
+//test 1, looping in same map
+e_tower,74,116,0	warp	#inf_warp1_1	2,2,e_tower,81,108
+e_tower,81,108,0	warp	#inf_warp1_2	2,2,e_tower,75,84
+e_tower,75,84,0	warp	#inf_warp1_3	2,2,e_tower,74,116
+
+//test 2, looping in different map
+e_tower,76,95,0	warp	#inf_warp2_1	2,2,alb2trea,84,48
+alb2trea,84,48,0	warp	#inf_warp2_2	2,2,guild_vs5,58,50
+guild_vs5,58,50,0	warp	#inf_warp2_3	2,2,e_tower,76,95
+
+//test 3, looping due to not available cell
+ecl_tdun04,26,31,0	warp	#inf_warp3_1	20,20,prontera,100,100