Makefile improvements

Author: Evan Klitzke

Makefile

@@ -1,17 +1,21 @@
 CC = gcc
 CFLAGS = -Os -Wall
-LDFLAGS = -lbz2 -llua
+LDFLAGS = -lbz2
 SOFLAGS = -fpic -shared
 
+# FIXME: Assumes you have GCC 4.4 installed for building on OS X
 ifeq ($(shell uname),Darwin)
 CC = gcc-mp-4.4
-CPPFLAGS = -I/opt/local/include
-LDFLAGS += -L/opt/local/lib
 endif
 
+ifeq ($(shell pkg-config --exists lua5.1; echo $$?),0)
+PFLAGS = $(shell pkg-config --cflags --libs lua5.1)
+else
+PFLAGS = $(shell pkg-config --cflags --libs lua)
+endif
 
 bz2.so: lbz.c
-	$(CC) $(CFLAGS) $(SOFLAGS) $(CPPFLAGS) $(LDFLAGS) lbz.c -o bz2.so
+	$(CC) $(SOFLAGS) $(PFLAGS) $(CFLAGS) $(LDFLAGS) lbz.c -o bz2.so
 
 clean:
 	-rm -f bz2.so

README

@@ -4,5 +4,10 @@ This software is released under a BSD-style license (to be exact, the ISC
 license). The full license can be found in the LICENSE file included with this
 source code.
 
+This has been tested with Lua 5.1 on Mac OS X (10.5) and Ubuntu. Getting this
+to work on Windows or with an earlier version of Lua is probably just a matter
+of massaging the Makefile. If this extension doesn't build for a platform
+you're using and you're able to fix the Makefile, please send me your patch.
+
 More information about Lua: http://www.lua.org/
 More information about bzip2: http://www.bzip.org/