$NetBSD: patch-Makefile,v 1.1 2020/07/09 16:12:57 nia Exp $

- Don't peek into /usr.
- Don't pass -g/-O2 unconditionally

--- Makefile.orig	2019-01-14 09:39:17.000000000 +0000
+++ Makefile
@@ -6,15 +6,8 @@ MKDIR		?= mkdir -p
 INSTALL		?= install
 INSTALL_PROGRAM	?= $(INSTALL)
 INSTALL_DATA	?= $(INSTALL) -m 644
-LUA_V		?= 5.1
-LUA_LDIR	?= /usr/share/lua/$(LUA_V)
-LUA_CDIR	?= /usr/lib/lua/$(LUA_V)
-
-COMMON_CFLAGS	 ?= -g -pedantic -Wall -O2 -shared -fPIC -DPIC -std=c99
-LUA_INC		?= -I/usr/include/lua$(LUA_V)
-MYSQL_INC	?= -I/usr/include/mysql
-PSQL_INC	?= -I/usr/include/postgresql
-SQLITE3_INC	?= -I/usr/include
+
+COMMON_CFLAGS	 ?= -pedantic -Wall -shared -fPIC -DPIC -std=c99
 DB2_INC		?= -I/opt/ibm/db2exc/V9.5/include
 ORACLE_INC	?= -I/usr/lib/oracle/xe/app/oracle/product/10.2.0/client/rdbms/public
 CF		 = $(LUA_INC) $(COMMON_CFLAGS) $(CFLAGS) -I.