--- /dev/null
+# Makefile for PngMinus (rpng2)
+# 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
+
+#XINC = -I/usr/include # old-style, stock X distributions
+#XLIB = -L/usr/lib/X11 -lX11 # (including SGI IRIX)
+
+#XINC = -I/usr/openwin/include # Sun workstations (OpenWindows)
+#XLIB = -L/usr/openwin/lib -lX11
+
+XINC = -I/usr/X11R6/include # new X distributions (X.org, etc.)
+XLIB = -L/usr/X11R6/lib -lX11
+#XLIB = -L/usr/X11R6/lib64 -lX11 # e.g., Red Hat on AMD64
+
+#XINC = -I/usr/local/include # FreeBSD
+#XLIB = -L/usr/local/lib -lX11
+
+#LIBS = $(XLIB)
+LIBS = $(XLIB) -lm #platforms that need libm
+
+CPPFLAGS=-I. $(XINC) -DPNG_USER_CONFIG -DNO_GZCOMPRESS -DZ_SOLO -DNO_GZIP
+CFLAGS=-O1 -Wall
+
+C=.c
+O=.o
+L=.a
+E=
+
+# Where to find the source code:
+PNGSRC =../../..
+ZLIBSRC=$(PNGSRC)/../zlib
+PROGSRC=$(PNGSRC)/contrib/gregbook
+
+# Zlib (minimal inflate requirements - crc32 is used by libpng)
+# zutil can be eliminated if you provide your own zcalloc and zcfree
+ZSRCS = adler32$(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$(C) \
+ pngpread$(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$(O) \
+ pngpread$(O) pngread$(O) pngrio$(O) pngrtran$(O) pngrutil$(O) \
+ pngset$(O) pngtrans$(O)
+
+PROGSRCS= rpng2-x$(C) readpng2$(C)
+PROGHDRS= readpng2.h
+PROGDOCS= COPYING LICENSE
+PROGOBJS= rpng2-x$(O) readpng2$(O)
+
+OBJS = $(PROGOBJS) $(PNGOBJS) $(ZOBJS)
+
+# implicit make rules -------------------------------------------------------
+
+.c$(O):
+ $(CC) -c $(CPPFLAGS) $(CFLAGS) $<
+
+# dependencies
+
+all: $(PROGDOCS) rpng2-x$(E)
+
+rpng2-x$(E): $(OBJS)
+ $(LD) -o rpng2-x$(E) $(OBJS) $(LIBS)
+
+# The DFA_XTRA setting turns all libpng options off then
+# turns on those required for this minimal build.
+# The CPP_FLAGS setting causes pngusr.h to be included in
+# both the build of pnglibconf.h and, subsequently, when
+# building libpng itself.
+$(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
+ $(RM) rpng2-x$(O)
+ $(RM) rpng2-x$(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: $(ZLIBSRC)/zconf.h not found; exit 1
+
+$(PROGSRCS) $(PROGHDRS) $(PROGDOCS): $(PROGSRC)/$@
+ $(RM) $@
+ $(COPY) $(PROGSRC)/$@ $@
+
+# End of makefile for rpng2-x
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