From 9910a464005afe5d4aa05e09125420e5cda0091b Mon Sep 17 00:00:00 2001
From: Dennis Schridde <devurandom@gmx.net>
Date: Sun, 7 Jul 2013 16:03:04 +0200
Subject: [PATCH] Add Makefile logic to ease compilation against luajit

Taken from lextlib and lua-term
---
 Makefile | 27 ++++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/Makefile b/Makefile
index 501e309..2fdb20b 100644
--- a/Makefile
+++ b/Makefile
@@ -2,10 +2,24 @@ ifeq ($(LUA_VERSION),)
 LUA_VERSION=5.2
 endif
 
-CFLAGS=-Wall -Werror -std=c99 -g -fPIC -I/usr/include/lua$(LUA_VERSION) -D_XOPEN_SOURCE=700
-LDFLAGS=-Wl,--no-undefined
-LIBS=-llua$(LUA_VERSION) -lpam
+ifeq ($(LUA_CPPFLAGS),)
+LUA_CPPFLAGS=-I/usr/include/lua$(LUA_VERSION)
+endif
+
+ifeq ($(LUA_LIBS),)
+LUA_LIBS=-llua$(LUA_VERSION)
+endif
 
+ifneq ($(DEBUG),)
+EXTRA_CFLAGS+= -g -O0
+endif
+
+CFLAGS=-Wall -Werror -pedantic -std=c99 -fPIC -D_XOPEN_SOURCE=700 $(EXTRA_CFLAGS)
+CPPFLAGS=$(LUA_CPPFLAGS)
+LDFLAGS=-Wl,--no-undefined $(LUA_LDFLAGS)
+LIBS=$(LUA_LIBS) -lpam
+
+.PHONY: all
 all: pam.so pam_util.so
 
 pam.o: pam.c lextlib/lextlib.h
@@ -14,11 +28,10 @@ pam.so: pam.o lextlib/lextlib.o
 pam_util.o: pam_util.c lextlib/lextlib.h
 pam_util.so: pam_util.o lextlib/lextlib.o lua-term/term.o
 
+.PHONY: clean
 clean:
 	$(RM) *.so *.o
 
-%.o: %.c
-	$(CC) $(CFLAGS) -o $@ -c $<
-
-%.so: %.o
+.SUFFIXES: .o .so
+.o.so:
 	$(CC) $(CFLAGS) $(LDFLAGS) -shared -o $@ $^ $(LIBS)