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
152