# makefile for libpng.a and libpng12.so on Linux ELF with gcc
# Copyright (C) 1998, 1999, 2002 Greg Roelofs and Glenn Randers-Pehrson
# Copyright (C) 1996, 1997 Andreas Dilger
# For conditions of distribution and use, see copyright notice in png.h

LIBNAME = libpng12
PNGMAJ = 0
PNGMIN = 1.2.2rc1
PNGVER = $(PNGMAJ).$(PNGMIN)

CC=gcc

# where "make install" puts libpng.a, libpng12/libpng12.so*,
# libpng12/png.h and libpng12/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) -lpng12 -lz -lm
LDFLAGS_A=-L$(ZLIBLIB) -Wl,-rpath,$(ZLIBLIB) libpng.a -lz -lm

RANLIB=ranlib
#RANLIB=echo

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 $(LIBNAME).so pngtest

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

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

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

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

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

pngtest-static: pngtest.o $(LIBNAME).a
	$(CC) -o pngtest-static $(CFLAGS) pngtest.o $(LDFLAGS_A)

test: pngtest pngtest-static
	@echo ""
	@echo "   Running pngtest dynamically linked with libpng12.so:"
	@echo ""
	./pngtest
	@echo ""
	@echo "   Running pngtest statically linked with libpng.a:"
	@echo ""
	./pngtest-static

install-headers: png.h pngconf.h
	-@if [ ! -d $(INCPATH) ]; then mkdir $(INCPATH); fi
	-@if [ ! -d $(INCPATH)/$(LIBNAME) ]; then mkdir $(INCPATH)/$(LIBNAME); fi
	cp png.h pngconf.h $(INCPATH)/$(LIBNAME)
	chmod 644 $(INCPATH)/$(LIBNAME)/png.h $(INCPATH)/$(LIBNAME)/pngconf.h
	-@/bin/rm -f $(INCPATH)/png.h $(INCPATH)/pngconf.h
	-@/bin/rm -f $(INCPATH)/libpng
	ln -sf $(INCPATH)/$(LIBNAME) $(INCPATH)/libpng

install-static: install-headers libpng.a
	-@if [ ! -d $(LIBPATH) ]; then mkdir $(LIBPATH); fi
	cp libpng.a $(LIBPATH)/$(LIBNAME).a
	chmod 644 $(LIBPATH)/$(LIBNAME).a
	-@/bin/rm -f $(LIBPATH)/libpng.a
	ln -sf $(LIBPATH)/$(LIBNAME).a $(LIBPATH)/libpng.a

install-shared: install-headers $(LIBNAME).so.$(PNGVER)
	-@if [ ! -d $(LIBPATH) ]; then mkdir $(LIBPATH); fi
	-@/bin/rm -f $(LIBPATH)/$(LIBNAME).so.$(PNGMAJ)* $(LIBPATH)/$(LIBNAME).so
	-@/bin/rm -f $(LIBPATH)/libpng.so
	-@/bin/rm -f $(LIBPATH)/libpng.so.3
	-@/bin/rm -f $(LIBPATH)/libpng.so.3.*
	cp $(LIBNAME).so.$(PNGVER) $(LIBPATH)
	chmod 755 $(LIBPATH)/$(LIBNAME).so.$(PNGVER)
	(cd $(LIBPATH); \
	ln -sf $(LIBNAME).so.$(PNGVER) libpng.so; \
	ln -sf $(LIBNAME).so.$(PNGVER) libpng.so.3; \
	ln -sf $(LIBNAME).so.$(PNGVER) libpng.so.3.$(PNGMIN); \
	ln -sf $(LIBNAME).so.$(PNGVER) $(LIBNAME).so.$(PNGMAJ); \
	ln -sf $(LIBNAME).so.$(PNGMAJ) $(LIBNAME).so)
	-@if [ ! -d $(LIBPATH)/pkgconfig ]; then mkdir $(LIBPATH)/pkgconfig; fi
	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! > libpng.pc
	cp libpng.pc $(LIBPATH)/pkgconfig/libpng12.pc
	chmod 644 $(LIBPATH)/pkgconfig/libpng12.pc

install: install-static install-shared


clean:
	/bin/rm -f *.o libpng.a $(LIBNAME).so $(LIBNAME).so.$(PNMAJ)* \
	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