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1# Makefile for PngMinus (pnm2pngm)
2# Linux / Unix
3
4#CC=cc
5CC=gcc
6LD=$(CC)
7
8# If awk fails try
9# make AWK=nawk
10
11# If cpp fails try
12# make CPP=/lib/cpp
13
14RM=rm -f
15COPY=cp
16
17CFLAGS=-DPNG_USER_CONFIG -DNO_GZIP -I. -O1
18
19C=.c
20O=.o
21L=.a
22E=
23
24# Where to find the source code:
25PNGSRC =../../..
26ZLIBSRC=$(PNGSRC)/../zlib
27PROGSRC=$(PNGSRC)/contrib/pngminus
28
29# Zlib
30ZSRCS = adler32$(C) compress$(C) crc32$(C) deflate$(C) \
31 trees$(C) zutil$(C)
32
33# Standard headers
34#ZH = zlib.h crc32.h deflate.h trees.h zutil.h
35ZH = zlib.h crc32.h deflate.h trees.h zutil.h
36
37# Machine generated headers
38ZCONF = zconf.h
39
40# Headers callers use
41ZINC = zlib.h $(ZCONF)
42
43# Headers the Zlib source uses
44ZHDRS = $(ZH) $(ZCONF)
45
46# compress is not required; it is needed to link the zlib
47# code because deflate defines an unused API function deflateBound
48# which itself calls compressBound from compress.
49ZOBJS = adler32$(O) compress$(O) crc32$(O) deflate$(O) \
50 trees$(O) zutil$(O)
51
52# libpng
53PNGSRCS=png$(C) pngerror$(C) pngget$(C) pngmem$(C) \
54 pngset$(C) pngtrans$(C) pngwio$(C) pngwrite$(C) \
55 pngwtran$(C) pngwutil$(C)
56
57# Standard headers
58PNGH =png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h
59
60# Machine generated headers
61PNGCONF=pnglibconf.h
62
63# Headers callers use
64PNGINC= png.h pngconf.h pngusr.h $(PNGCONF)
65
66# Headers the PNG library uses
67PNGHDRS=$(PNGH) $(PNGCONF) pngusr.h
68
69PNGOBJS=png$(O) pngerror$(O) pngget$(O) pngmem$(O) \
70 pngset$(O) pngtrans$(O) pngwio$(O) pngwrite$(O) \
71 pngwtran$(O) pngwutil$(O)
72
73PROGSRCS= pnm2pngm$(C)
74PROGHDRS=
75PROGDOCS=
76PROGOBJS= pnm2pngm$(O)
77
78OBJS = $(PROGOBJS) $(PNGOBJS) $(ZOBJS)
79
80# implicit make rules -------------------------------------------------------
81
82.c$(O):
83 $(CC) -c $(CFLAGS) $<
84
85# dependencies
86
87all: pnm2pngm$(E)
88
89pnm2pngm$(E): $(OBJS)
90 $(LD) -o pnm2pngm$(E) $(OBJS)
91
92# The DFA_XTRA setting turns all libpng options off then
93# turns on those required for this minimal build.
94# The CPP_FLAGS setting causes pngusr.h to be included in
95# both the build of pnglibconf.h and, subsequently, when
96# building libpng itself.
97$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak\
98 $(PNGSRC)/scripts/pnglibconf.dfa \
99 $(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa
100 $(RM) pnglibconf.h pnglibconf.dfn
101 $(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\
102 srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG"\
103 DFA_XTRA="pngusr.dfa" $@
104
105clean:
106 $(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\
107 srcdir=$(PNGSRC) clean
108 $(RM) pnm2pngm$(O)
109 $(RM) pnm2pngm$(E)
110 $(RM) $(OBJS)
111
112# distclean also removes the copied source and headers
113distclean: clean
114 $(RM) -r scripts # historical reasons
115 $(RM) $(PNGSRCS) $(PNGH)
116 $(RM) $(ZSRCS) $(ZH) $(ZCONF)
117 $(RM) $(PROGSRCS) $(PROGHDRS) $(PROGDOCS)
118
119# Header file dependencies:
120$(PROGOBJS): $(PROGHDRS) $(PNGINC) $(ZINC)
121$(PNGOBJS): $(PNGHDRS) $(ZINC)
122$(ZOBJS): $(ZHDRS)
123
124# Gather the source code from the respective directories
125$(PNGSRCS) $(PNGH): $(PNGSRC)/$@
126 $(RM) $@
127 $(COPY) $(PNGSRC)/$@ $@
128
129# No dependency on the ZLIBSRC target so that it only needs
130# to be specified once.
131$(ZSRCS) $(ZH):
132 $(RM) $@
133 $(COPY) $(ZLIBSRC)/$@ $@
134
135# The unconfigured zconf.h varies in name according to the
136# zlib release
137$(ZCONF):
138 $(RM) $@
139 @for f in zconf.h.in zconf.in.h zconf.h; do\
140 test -r $(ZLIBSRC)/$$f &&\
141 echo $(COPY) $(ZLIBSRC)/$$f $@ &&\
142 $(COPY) $(ZLIBSRC)/$$f $@ && exit 0;\
143 done; echo copy: $(ZLIBSRC)/zconf.h not found; exit 1
144
145pnm2pngm.c: $(PROGSRC)/pnm2png.c
146 $(RM) $@
147 $(COPY) $(PROGSRC)/pnm2png.c $@
148
149# End of makefile for pnm2pngm