# makefile for libpng.a and libpng12.so on Linux ELF with gcc using MMX
# assembler code
# Copyright 2002 Greg Roelofs and Glenn Randers-Pehrson
# Copyright 1998-2001 Greg Roelofs
# Copyright 1996-1997 Andreas Dilger
# For conditions of distribution and use, see copyright notice in png.h

# CAUTION: Do not use this makefile with gcc versions 2.7.2.2 and earlier.

# WARNING: The assembler code in pnggccrd.c may not be thread safe.

# NOTE:  When testing MMX performance on a multitasking system, make sure
#        there are no floating-point programs (e.g., SETI@Home) running in
#        the background!  Context switches between MMX and FPU are expensive.

LIBNAME = libpng12
PNGMAJ = 0
PNGMIN = 1.2.3
PNGVER = $(PNGMAJ).$(PNGMIN)

CC=gcc

# where "make install" puts libpng.a, libpng12/libpng12.so*,
# $(LIBNAME)/png.h and $(LIBNAME)/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.

# Remove -DPNG_THREAD_UNSAFE_OK if you need thread safety
### for generic gcc:
CFLAGS=-DPNG_THREAD_UNSAFE_OK -DPNG_USE_PNGGCCRD -I$(ZLIBINC) -Wall \
	-O3 $(ALIGN) -funroll-loops \
	-fomit-frame-pointer  # $(WARNMORE) -g -DPNG_DEBUG=5
### for gcc 2.95.2 on 686:
#CFLAGS=-DPNG_THREAD_UNSAFE_OK -DPNG_USE_PNGGCCRD -I$(ZLIBINC) -Wall -O3 \
#	-mcpu=i686 -malign-double -ffast-math -fstrict-aliasing \
#	$(ALIGN) -funroll-loops -funroll-all-loops -fomit-frame-pointer 
### for gcc 2.7.2.3 on 486 and up:
#CFLAGS=-DPNG_THREAD_UNSAFE_OK -DPNG_USE_PNGGCCRD -I$(ZLIBINC) -Wall -O3 \
#	-m486 -malign-double -ffast-math \
#	$(ALIGN) -funroll-loops -funroll-all-loops -fomit-frame-pointer 

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
MANPATH=$(prefix)/man
BINPATH=$(prefix)/bin

# 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, that location must already exist before
# you execute make install.
DESTDIR=

DB=$(DESTDIR)/$(BINPATH)
DI=$(DESTDIR)/$(INCPATH)
DL=$(DESTDIR)/$(LIBPATH)
DM=$(DESTDIR)/$(MANPATH)

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 pnggccrd.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 pngtest-static

libpng.pc:
	cat scripts/libpng.pc.in | sed -e s\!@PREFIX@!$(prefix)! > libpng.pc

libpng-config:
	( cat scripts/libpng-config-head.in; \
	echo prefix=\"$(prefix)\"; \
	echo cppflags=\"-I$(INCPATH)/$(LIBNAME) -DPNG_THREAD_UNSAFE_OK \
	   -DPNG_USE_PNGGCCRD"; \
	echo cflags=\"\"; \
	echo ldflags=\"\"; \
	echo libs=\"-lpng12 -lz -lm\"; \
	cat scripts/libpng-config-body.in ) > libpng-config
	chmod +x libpng-config

pnggccrd.o:	pnggccrd.c png.h pngconf.h
	$(CC) -c $(CFLAGS) -o $@ $*.c

pnggccrd.pic.o:	pnggccrd.c png.h pngconf.h
	$(CC) -c $(CFLAGS) -fPIC -o $@ pnggccrd.c

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

test: pngtest pngtest-static
	@echo ""
	@echo "   Running pngtest dynamically linked with $(LIBNAME).so:"
	@echo ""
	./pngtest
	@echo ""
	@echo "   Running pngtest statically linked with libpng.a:"
	@echo ""
	./pngtest-static

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

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

install-shared: install-headers $(LIBNAME).so.$(PNGVER) libpng.pc
	-@if [ ! -d $(DL) ]; then mkdir $(DL); fi
	-@/bin/rm -f $(DL)/$(LIBNAME).so.$(PNGMAJ)* \
	$(DL)/$(LIBNAME).so
	-@/bin/rm -f $(DL)/libpng.so
	-@/bin/rm -f $(DL)/libpng.so.3
	-@/bin/rm -f $(DL)/libpng.so.3.*
	cp $(LIBNAME).so.$(PNGVER) $(DL)
	chmod 755 $(DL)/$(LIBNAME).so.$(PNGVER)
	(cd $(DL); \
	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 $(DL)/pkgconfig ]; then mkdir $(DL)/pkgconfig; fi
	-@/bin/rm -f $(DL)/pkgconfig/$(LIBNAME).pc
	-@/bin/rm -f $(DL)/pkgconfig/libpng.pc
	cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
	chmod 644 $(DL)/pkgconfig/$(LIBNAME).pc
	(cd $(DL)/pkgconfig; ln -sf $(LIBNAME).pc libpng.pc)

install-man: libpng.3 libpngpf.3 png.5
	-@if [ ! -d $(DM) ]; then mkdir $(DM); fi
	-@if [ ! -d $(DM)/man3 ]; then mkdir $(DM)/man3; fi
	-@/bin/rm -f $(DM)/man3/libpng.3
	-@/bin/rm -f $(DM)/man3/libpngpf.3
	cp libpng.3 $(DM)/man3
	cp libpngpf.3 $(DM)/man3
	-@if [ ! -d $(DM)/man5 ]; then mkdir $(DM)/man5; fi
	-@/bin/rm -f $(DM)/man5/png.5
	cp png.5 $(DM)/man5

install-config: libpng-config
	-@if [ ! -d $(DB) ]; then mkdir $(DB); fi
	-@/bin/rm -f $(DB)/libpng-config
	-@/bin/rm -f $(DB)/$(LIBNAME)-config
	cp libpng-config $(DB)/$(LIBNAME)-config
	chmod 755 $(DB)/$(LIBNAME)-config
	(cd $(DB); ln -sf $(LIBNAME)-config libpng-config)

install: install-static install-shared install-man install-config

clean:
	/bin/rm -f *.o libpng.a $(LIBNAME).so $(LIBNAME).so.$(PNGMAJ)* \
	pngtest pngout.png

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

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

pngtest.o:			png.h pngconf.h pngtest.c