$NetBSD$

Make it buildable for all allegro version >= 5
Add required link option

Honor LDFLAGS.

--- meka/srcs/Makefile.orig	2016-12-14 16:51:57.000000000 +0000
+++ meka/srcs/Makefile
@@ -203,7 +203,7 @@ LIB_ALLEG = -lalleg
 endif
 
 ifeq ($(SYSTEM), unix)
-LIB_ALLEG = `pkg-config --cflags --libs allegro-5.0 allegro_image-5.0 allegro_audio-5.0 allegro_font-5.0 allegro_primitives-5.0 allegro_ttf-5.0`
+LIB_ALLEG = `pkg-config --cflags --libs allegro-5 allegro_image-5 allegro_audio-5 allegro_font-5 allegro_primitives-5 allegro_ttf-5` -Wl,-R${PREFIX}/lib
 endif
 
 ifeq ($(SYSTEM), macosx)
@@ -219,7 +219,7 @@ ifeq ($(SYSTEM), win32)
 LIB = $(LIB_PATHS) $(RESSOURCES)
 LIB += $(LIB_ALLEG) $(LIB_SOUND) $(LIB_ZIP) $(LIB_OS) -nodefaultlib:msvcrt
 else
-LIB = $(LIB_PATHS) $(LIB_ALLEG) $(LIB_SOUND) $(LIB_OS) $(LIB_PNG) $(LIB_ZIP)
+LIB = $(LDFLAGS) $(LIB_PATHS) $(LIB_ALLEG) $(LIB_SOUND) $(LIB_OS) $(LIB_PNG) $(LIB_ZIP)
 endif
 
 #-----------------------------------------------------
