# makefile for libpng on Linux ELF with gcc
# Copyright (C) 1998, 1999 Greg Roelofs
# Copyright (C) 1996, 1997 Andreas Dilger
# For conditions of distribution and use, see copyright notice in png.h

CC=gcc

# where "make install" puts libpng.a, libpng.so*, png.h and pngconf.h
prefix=/usr/local

# Where the zlib library and include files are located
#ZLIBLIB=/usr/local/lib
#ZLIBINC=/usr/local/include
ZLIBLIB=../zlib
ZLIBINC=../zlib

ALIGN=
# for i386:
#ALIGN=-malign-loops=2 -malign-functions=2

WARNMORE=-Wwrite-strings -Wpointer-arith -Wshadow \
	-Wmissing-declarations -Wtraditional -Wcast-align \
	-Wstrict-prototypes -Wmissing-prototypes #-Wconversion

# for pgcc version 2.95.1, -O3 is buggy; don't use it.

CFLAGS=-I$(ZLIBINC) -Wall -O3 -funroll-loops \
	$(ALIGN) # $(WARNMORE) -g -DPNG_DEBUG=5
LDFLAGS=-L. -Wl,-rpath,. -L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) -lpng -lz -lm

RANLIB=ranlib
#RANLIB=echo

# read libpng.txt or png.h to see why PNGMAJ is 3.  You should not
# have to change it.
PNGMAJ = 3
PNGMIN = 1.2.0
PNGVER = $(PNGMAJ).$(PNGMIN)

INCPATH=$(prefix)/include
LIBPATH=$(prefix)/lib

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

OBJSDLL = $(OBJS:.o=.pic.o)

.SUFFIXES:      .c .o .pic.o

.c.pic.o:
	$(CC) -c $(CFLAGS) -fPIC -o $@ $*.c

all: libpng.a libpng.so pngtest

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

libpng.so: libpng.so.$(PNGMAJ)
	ln -sf libpng.so.$(PNGMAJ) libpng.so

libpng.so.$(PNGMAJ): libpng.so.$(PNGVER)
	ln -sf libpng.so.$(PNGVER) libpng.so.$(PNGMAJ)

libpng.so.$(PNGVER): $(OBJSDLL)
	$(CC) -shared -Wl,-soname,libpng.so.$(PNGMAJ) -o libpng.so.$(PNGVER) \
	 $(OBJSDLL) -L$(ZLIBLIB) -lz -lm -lc

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

test: pngtest
	./pngtest

install: libpng.a libpng.so.$(PNGVER)
	-@if [ ! -d $(INCPATH)  ]; then mkdir $(INCPATH); fi
	-@if [ ! -d $(LIBPATH) ]; then mkdir $(LIBPATH); fi
	cp png.h pngconf.h $(INCPATH)
	chmod 644 $(INCPATH)/png.h $(INCPATH)/pngconf.h
	cp libpng.a libpng.so.$(PNGVER) $(LIBPATH)
	chmod 755 $(LIBPATH)/libpng.so.$(PNGVER)
	-@/bin/rm -f $(LIBPATH)/libpng.so.$(PNGMAJ) $(LIBPATH)/libpng.so
	(cd $(LIBPATH); ln -sf libpng.so.$(PNGVER) libpng.so.$(PNGMAJ); \
	 ln -sf libpng.so.$(PNGMAJ) libpng.so)

clean:
	/bin/rm -f *.o libpng.a libpng.so* pngtest pngout.png

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

pngtest.o: png.h pngconf.h