# makefile for libpng
# Copyright (C) 2002, 2006, 2009 Glenn Randers-Pehrson
# Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc.
#
# This code is released under the libpng license.
# For conditions of distribution and use, see the disclaimer
# and license in png.h
#
# This makefile requires the file ansi2knr.c, which you can get
# from the Ghostscript ftp site at ftp://ftp.cs.wisc.edu/ghost/
# If you have libjpeg, you probably already have ansi2knr.c in the jpeg
# source distribution.

# where make install puts libpng.a and png.h
prefix=/usr/local
INCPATH=$(prefix)/include
LIBPATH=$(prefix)/lib

# override DESTDIR= on the make install command line to easily support
# installing into a temporary location.  Example:
#
#    make install DESTDIR=/tmp/build/libpng
#
# If you're going to install into a temporary location
# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
# you execute make install.
DESTDIR=

CC=cc
CFLAGS=-DPNG_CONFIGURE_LIBPNG -I../zlib -O
LDFLAGS=-L. -L../zlib/ -lpng -lz -lm
# flags for ansi2knr
ANSI2KNRFLAGS=

RANLIB=ranlib
#RANLIB=echo

OBJS = png.o pngset.o pngget.o pngrutil.o pngtrans.o pngwutil.o \
	pngread.o pngrio.o pngwio.o pngwrite.o pngrtran.o \
	pngwtran.o pngmem.o pngerror.o pngpread.o

all: ansi2knr libpng.a pngtest

# general rule to allow ansi2knr to work
.c.o:
	./ansi2knr $*.c T$*.c
	$(CC) $(CFLAGS) -c T$*.c
	rm -f T$*.c $*.o
	mv T$*.o $*.o

ansi2knr: ansi2knr.c
	$(CC) $(CFLAGS) $(ANSI2KNRFLAGS) -o ansi2knr ansi2knr.c

libpng.a: ansi2knr $(OBJS)
	ar rc $@  $(OBJS)
	$(RANLIB) $@

pngtest: pngtest.o libpng.a
	$(CC) -o pngtest $(CFLAGS) pngtest.o $(LDFLAGS)

test: pngtest
	./pngtest

install: libpng.a png.h pngconf.h
	-@mkdir $(DESTDIR)$(INCPATH)
	-@mkdir $(DESTDIR)$(INCPATH)/libpng
	-@mkdir $(DESTDIR)$(LIBPATH)
	-@rm -f $(DESTDIR)$(INCPATH)/png.h
	-@rm -f $(DESTDIR)$(INCPATH)/pngconf.h
	cp png.h $(DESTDIR)$(INCPATH)/libpng
	cp pngconf.h $(DESTDIR)$(INCPATH)/libpng
	chmod 644 $(DESTDIR)$(INCPATH)/libpng/png.h
	chmod 644 $(DESTDIR)$(INCPATH)/libpng/pngconf.h
	(cd $(DESTDIR)$(INCPATH); ln -f -s libpng/* .)
	cp libpng.a $(DESTDIR)$(LIBPATH)
	chmod 644 $(DESTDIR)$(LIBPATH)/libpng.a

clean:
	rm -f *.o libpng.a pngtest pngout.png ansi2knr

DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
writelock:
	chmod a-w *.[ch35] $(DOCS) scripts/*

# DO NOT DELETE THIS LINE -- make depend depends on it.

png.o: png.h pngconf.h
pngerror.o: png.h pngconf.h
pngrio.o: png.h pngconf.h
pngwio.o: png.h pngconf.h
pngmem.o: png.h pngconf.h
pngset.o: png.h pngconf.h
pngget.o: png.h pngconf.h
pngread.o: png.h pngconf.h
pngpread.o: png.h pngconf.h
pngrtran.o: png.h pngconf.h
pngrutil.o: png.h pngconf.h
pngtrans.o: png.h pngconf.h
pngwrite.o: png.h pngconf.h
pngwtran.o: png.h pngconf.h
pngwutil.o: png.h pngconf.h

pngtest.o: png.h pngconf.h