source: rtems-graphics-toolkit/libpng-1.5.12/contrib/pngminim/encoder/makefile @ 1cb4ff2

# Makefile for PngMinus (pnm2pngm)
# 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

CFLAGS=-DPNG_USER_CONFIG -DNO_GZIP -I. -O1

C=.c
O=.o
L=.a
E=

# Where to find the source code:
PNGSRC =../../..
ZLIBSRC=$(PNGSRC)/../zlib
PROGSRC=$(PNGSRC)/contrib/pngminus

# Zlib
ZSRCS  = adler32$(C) compress$(C) crc32$(C) deflate$(C) \
         trees$(C) zutil$(C)

# Standard headers
#ZH     = zlib.h crc32.h deflate.h trees.h zutil.h
ZH     = zlib.h crc32.h deflate.h trees.h zutil.h

# Machine generated headers
ZCONF  = zconf.h

# Headers callers use
ZINC   = zlib.h $(ZCONF)

# Headers the Zlib source uses
ZHDRS  = $(ZH) $(ZCONF)

# compress is not required; it is needed to link the zlib
# code because deflate defines an unused API function deflateBound
# which itself calls compressBound from compress.
ZOBJS  = adler32$(O) compress$(O) crc32$(O) deflate$(O) \
         trees$(O) zutil$(O)

# libpng
PNGSRCS=png$(C) pngerror$(C) pngget$(C) pngmem$(C) \
        pngset$(C) pngtrans$(C) pngwio$(C) pngwrite$(C) \
        pngwtran$(C) pngwutil$(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) \
        pngset$(O) pngtrans$(O) pngwio$(O) pngwrite$(O) \
        pngwtran$(O) pngwutil$(O)

PROGSRCS= pnm2pngm$(C)
PROGHDRS=
PROGDOCS=
PROGOBJS= pnm2pngm$(O)

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

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

.c$(O):
        $(CC) -c $(CFLAGS) $<

# dependencies

all: pnm2pngm$(E)

pnm2pngm$(E): $(OBJS)
        $(LD) -o pnm2pngm$(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\
        $(PNGSRC)/scripts/pnglibconf.dfa \
        $(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa
        $(RM) pnglibconf.h pnglibconf.dfn
        $(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\
            srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG"\
            DFA_XTRA="pngusr.dfa" $@

clean:
        $(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\
            srcdir=$(PNGSRC) clean
        $(RM) pnm2pngm$(O)
        $(RM) pnm2pngm$(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

pnm2pngm.c: $(PROGSRC)/pnm2png.c
        $(RM) $@
        $(COPY) $(PROGSRC)/pnm2png.c $@

# End of makefile for pnm2pngm