# Makefile for PngMinus (pngm2pnm)

# Linux / Unix

#CC=cc

CC=gcc

LD=$(CC)

# If awk fails try

# make AWK=nawk

# If cpp fails try

# make CPP=/lib/cpp

RM=rm -f

COPY=cp

CPPFLAGS=-I. -DPNG_USER_CONFIG -DNO_GZCOMPRESS -DZ_SOLO -DNO_GZIP

CFLAGS=-O1 -Wall

C=.c

O=.o

L=.a

E=

# Where to find the source code:

PNGSRC =../../..

ZLIBSRC=$(PNGSRC)/../zlib

PROGSRC=$(PNGSRC)/contrib/pngminus

# Zlib (minimal inflate requirements - crc32 is used by libpng)

# zutil can be eliminated if you provide your own zcalloc and zcfree

ZSRCS  = adler32$(C) crc32$(C) \

	 inffast$(C) inflate$(C) inftrees$(C) \

	 zutil$(C)

# Standard headers

ZH     = zlib.h crc32.h inffast.h inffixed.h \

	 inflate.h inftrees.h zutil.h

# Machine generated headers

ZCONF  = zconf.h

# Headers callers use

ZINC   = zlib.h $(ZCONF)

# Headers the Zlib source uses

ZHDRS  = $(ZH) $(ZCONF)

ZOBJS  = adler32$(O) crc32$(O) \

	 inffast$(O) inflate$(O) inftrees$(O) \

	 zutil$(O)

# libpng

PNGSRCS=png$(C) pngerror$(C) pngget$(C) pngmem$(C) \

	pngread$(C) pngrio$(C) pngrtran$(C) pngrutil$(C) \

	pngset$(C) pngtrans$(C)

# Standard headers

PNGH   =png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h

# Machine generated headers

PNGCONF=pnglibconf.h

# Headers callers use

PNGINC= png.h pngconf.h pngusr.h $(PNGCONF)

# Headers the PNG library uses

PNGHDRS=$(PNGH) $(PNGCONF) pngusr.h

PNGOBJS=png$(O) pngerror$(O) pngget$(O) pngmem$(O) \

	pngread$(O) pngrio$(O) pngrtran$(O) pngrutil$(O) \

	pngset$(O) pngtrans$(O)

PROGSRCS= pngm2pnm$(C)

PROGHDRS=

PROGDOCS=

PROGOBJS= pngm2pnm$(O)

OBJS    = $(PROGOBJS) $(PNGOBJS) $(ZOBJS)

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

# note: dependencies do not work on implicit rule lines

.c$(O):

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

# dependencies

all: pngm2pnm$(E)

pngm2pnm$(E): $(OBJS)

	$(LD) -o pngm2pnm$(E) $(OBJS)

# The DFA_XTRA setting turns all libpng options off then

# turns on those required for this minimal build.

# The CPP_FLAGS setting causes pngusr.h to be included in

# both the build of pnglibconf.h and, subsequently, when

# building libpng itself.

$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak $(ZH)\

	$(PNGSRC)/scripts/pnglibconf.dfa \

	$(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa

	$(RM) pnglibconf.h pnglibconf.dfn

	$(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\

	    srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG -I."\

	    DFA_XTRA="pngusr.dfa" $@

clean:

	$(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\

	    srcdir=$(PNGSRC) clean

	$(RM) pngm2pnm$(O)

	$(RM) pngm2pnm$(E)

	$(RM) $(OBJS)

# distclean also removes the copied source and headers

distclean: clean

	$(RM) -r scripts # historical reasons

	$(RM) $(PNGSRCS) $(PNGH)

	$(RM) $(ZSRCS) $(ZH) $(ZCONF)

	$(RM) $(PROGSRCS) $(PROGHDRS) $(PROGDOCS)

# Header file dependencies:

$(PROGOBJS): $(PROGHDRS) $(PNGINC) $(ZINC)

$(PNGOBJS): $(PNGHDRS) $(ZINC)

$(ZOBJS): $(ZHDRS)

# Gather the source code from the respective directories

$(PNGSRCS) $(PNGH): $(PNGSRC)/$@

	$(RM) $@

	$(COPY) $(PNGSRC)/$@ $@

# No dependency on the ZLIBSRC target so that it only needs

# to be specified once.

$(ZSRCS) $(ZH):

	$(RM) $@

	$(COPY) $(ZLIBSRC)/$@ $@

# The unconfigured zconf.h varies in name according to the

# zlib release

$(ZCONF):

	$(RM) $@

	@for f in zconf.h.in zconf.in.h zconf.h; do\

	    test -r $(ZLIBSRC)/$$f &&\

	    echo $(COPY) $(ZLIBSRC)/$$f $@ &&\

	    $(COPY) $(ZLIBSRC)/$$f $@ && exit 0;\

	done; echo copy: $(ZLIBSRC)/zconf.h not found; exit 1

pngm2pnm.c: $(PROGSRC)/png2pnm.c

	$(RM) $@

	$(COPY) $(PROGSRC)/png2pnm.c $@

# End of makefile for pngm2pnm