# Sample makefile for pngcrush using gcc and GNU make.

# Glenn Randers-Pehrson

# Last modified:  19 February 2005

# Kapil Hari Paranjape

# Last modified:  12 June 2008

#

# Invoke this makefile from a shell prompt in the usual way; for example:

#

#	make -f Makefile

#

# This makefile builds a dynamically linked executable.

# macros --------------------------------------------------------------------

GAS_VERSION := $(shell as --version | sed -n -e's/GNU assembler (.*) //p')

PNGINC = /usr/include

CC ?= gcc

RM = rm -f

CFLAGS += -I. -Wall

O = .o

E =

# additional defines

DEFINES = -DPNG_USE_PNGGCCRD -DPNG_iCCP_SUPPORTED \

	-DPNG_iTXt_SUPPORTED -DPNG_USE_GLOBAL_ARRAYS \

	-DGAS_VERSION="\"${GAS_VERSION}\"" \

PNGCRUSH  = pngcrush

LIBS = -lpng -lz

OBJS  = pngcrush$(O)

EXES = $(PNGCRUSH)$(E)

# implicit make rules -------------------------------------------------------

.c$(O): png.h cexcept.h $(ZHDR)

	$(CC) -c $(CFLAGS) $(DEFINES) $<

# dependencies --------------------------------------------------------------

all:  $(EXES)

png.h:

	ln -s $(PNGINC)/png.h png.h

pngcrush$(O): pngcrush.c cexcept.h

	$(CC) -c $(CFLAGS) $(DEFINES) $<

$(PNGCRUSH)$(E): $(OBJS)

	$(CC) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)

# maintenance ---------------------------------------------------------------

clean:

	$(RM) $(EXES) $(OBJS) png.h

install:

	mkdir -p $(DESTDIR)/usr/bin/

	cp $(PNGCRUSH)$(E) $(DESTDIR)/usr/bin/

	chmod 0755 $(DESTDIR)/usr/bin/$(PNGCRUSH)$(E)