1# Makefile for PngMinus (pngm2pnm)
  2# Linux / Unix
  3
  4#CC=cc
  5CC=gcc
  6LD=$(CC)
  7
  8# If awk fails try
  9# make AWK=nawk
 10
 11# If cpp fails try
 12# make CPP=/lib/cpp
 13
 14RM=rm -f
 15COPY=cp
 16
 17CPPFLAGS=-I. -DPNG_USER_CONFIG -DNO_GZCOMPRESS -DZ_SOLO -DNO_GZIP
 18CFLAGS=-O1 -Wall
 19
 20C=.c
 21O=.o
 22L=.a
 23E=
 24
 25# Where to find the source code:
 26PNGSRC =../../..
 27ZLIBSRC=$(PNGSRC)/../zlib
 28PROGSRC=$(PNGSRC)/contrib/pngminus
 29
 30# Zlib (minimal inflate requirements - crc32 is used by libpng)
 31# zutil can be eliminated if you provide your own zcalloc and zcfree
 32ZSRCS  = adler32$(C) crc32$(C) \
 33	 inffast$(C) inflate$(C) inftrees$(C) \
 34	 zutil$(C)
 35
 36# Standard headers
 37ZH     = zlib.h crc32.h inffast.h inffixed.h \
 38	 inflate.h inftrees.h zutil.h
 39
 40# Machine generated headers
 41ZCONF  = zconf.h
 42
 43# Headers callers use
 44ZINC   = zlib.h $(ZCONF)
 45
 46# Headers the Zlib source uses
 47ZHDRS  = $(ZH) $(ZCONF)
 48
 49ZOBJS  = adler32$(O) crc32$(O) \
 50	 inffast$(O) inflate$(O) inftrees$(O) \
 51	 zutil$(O)
 52
 53# libpng
 54PNGSRCS=png$(C) pngerror$(C) pngget$(C) pngmem$(C) \
 55	pngread$(C) pngrio$(C) pngrtran$(C) pngrutil$(C) \
 56	pngset$(C) pngtrans$(C)
 57	
 58# Standard headers
 59PNGH   =png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h
 60
 61# Machine generated headers
 62PNGCONF=pnglibconf.h
 63
 64# Headers callers use
 65PNGINC= png.h pngconf.h pngusr.h $(PNGCONF)
 66
 67# Headers the PNG library uses
 68PNGHDRS=$(PNGH) $(PNGCONF) pngusr.h
 69
 70PNGOBJS=png$(O) pngerror$(O) pngget$(O) pngmem$(O) \
 71	pngread$(O) pngrio$(O) pngrtran$(O) pngrutil$(O) \
 72	pngset$(O) pngtrans$(O)
 73
 74PROGSRCS= pngm2pnm$(C)
 75PROGHDRS=
 76PROGDOCS=
 77PROGOBJS= pngm2pnm$(O)
 78
 79OBJS    = $(PROGOBJS) $(PNGOBJS) $(ZOBJS)
 80
 81# implicit make rules -------------------------------------------------------
 82
 83# note: dependencies do not work on implicit rule lines
 84.c$(O):
 85	$(CC) -c $(CPPFLAGS) $(CFLAGS) $<
 86
 87# dependencies
 88
 89all: pngm2pnm$(E)
 90
 91pngm2pnm$(E): $(OBJS)
 92	$(LD) -o pngm2pnm$(E) $(OBJS)
 93
 94# The DFA_XTRA setting turns all libpng options off then
 95# turns on those required for this minimal build.
 96# The CPP_FLAGS setting causes pngusr.h to be included in
 97# both the build of pnglibconf.h and, subsequently, when
 98# building libpng itself.
 99$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak $(ZH)\
100	$(PNGSRC)/scripts/pnglibconf.dfa \
101	$(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa
102	$(RM) pnglibconf.h pnglibconf.dfn
103	$(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\
104	    srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG -I."\
105	    DFA_XTRA="pngusr.dfa" $@
106
107clean:
108	$(MAKE) -f $(PNGSRC)/scripts/pnglibconf.mak $(MAKEFLAGS)\
109	    srcdir=$(PNGSRC) clean
110	$(RM) pngm2pnm$(O)
111	$(RM) pngm2pnm$(E)
112	$(RM) $(OBJS)
113
114# distclean also removes the copied source and headers
115distclean: clean
116	$(RM) -r scripts # historical reasons
117	$(RM) $(PNGSRCS) $(PNGH)
118	$(RM) $(ZSRCS) $(ZH) $(ZCONF)
119	$(RM) $(PROGSRCS) $(PROGHDRS) $(PROGDOCS)
120
121# Header file dependencies:
122$(PROGOBJS): $(PROGHDRS) $(PNGINC) $(ZINC)
123$(PNGOBJS): $(PNGHDRS) $(ZINC)
124$(ZOBJS): $(ZHDRS)
125
126# Gather the source code from the respective directories
127$(PNGSRCS) $(PNGH): $(PNGSRC)/$@
128	$(RM) $@
129	$(COPY) $(PNGSRC)/$@ $@
130
131# No dependency on the ZLIBSRC target so that it only needs
132# to be specified once.
133$(ZSRCS) $(ZH):
134	$(RM) $@
135	$(COPY) $(ZLIBSRC)/$@ $@
136
137# The unconfigured zconf.h varies in name according to the
138# zlib release
139$(ZCONF):
140	$(RM) $@
141	@for f in zconf.h.in zconf.in.h zconf.h; do\
142	    test -r $(ZLIBSRC)/$$f &&\
143	    echo $(COPY) $(ZLIBSRC)/$$f $@ &&\
144	    $(COPY) $(ZLIBSRC)/$$f $@ && exit 0;\
145	done; echo copy: $(ZLIBSRC)/zconf.h not found; exit 1
146
147pngm2pnm.c: $(PROGSRC)/png2pnm.c
148	$(RM) $@
149	$(COPY) $(PROGSRC)/png2pnm.c $@
150
151# End of makefile for pngm2pnm