--- config.orig	2020-04-23 01:16:42 UTC
+++ config
@@ -1,16 +1,15 @@
 # Installation directories
 
 # Default installation prefix
-PREFIX=/usr/local
+PREFIX?=/usr/local
 
-LUA_VERSION = 5.1
+LUA_VERSION?= 5.1
 
 # System's libraries directory (where binary libraries are installed)
-LUA_LIBDIR= $(PREFIX)/lib/lua/$(LUA_VERSION)
+LUA_LIBDIR= %%MODLIBDIR%%
 
 # Lua includes directory
-LUA_INC += -I$(PREFIX)/include
-LUA_INC += -I/usr/include/lua$(LUA_VERSION) -I/usr/include/lua/$(LUA_VERSION)
+LUA_INC += %%INCDIR%%
 
 # OS dependent
 LIB_OPTION= -shared #for Linux
@@ -22,7 +21,7 @@ MACOSX_DEPLOYMENT_TARGET= 10.5
 # Compilation directives
 WARN= -O2 -Wall -fPIC -W -Waggregate-return -Wcast-align -Wmissing-prototypes -Wnested-externs -Wshadow -Wwrite-strings -pedantic
 INCS= $(LUA_INC)
-CFLAGS= $(WARN) $(INCS)
-CC= gcc
+CFLAGS+= $(WARN) $(INCS)
+CC?= gcc
 
 # $Id: config,v 1.21 2007/10/27 22:42:32 carregal Exp $