# Sample makefile for rpng-win / rpng2-win / wpng using mingw32-gcc and make.
# Greg Roelofs
# Last modified:  2 June 2007
#
#	The programs built by this makefile are described in the book,
#	"PNG:  The Definitive Guide," by Greg Roelofs (O'Reilly and
#	Associates, 1999).  Go buy a copy, eh?  Well, OK, it's not
#	generally for sale anymore, but it's the thought that counts,
#	right?  (Hint:  http://www.libpng.org/pub/png/book/ )
#
# Invoke this makefile from a DOS-prompt window via:
#
#	make -f Makefile.mingw32
#
# This makefile assumes libpng and zlib have already been built or downloaded
# and are in subdirectories at the same level as the current subdirectory
# (as indicated by the PNGDIR and ZDIR macros below).  It makes no assumptions
# at all about the mingw32 installation tree (W32DIR).  Edit as appropriate.
#
# Note that the names of the dynamic and static libpng and zlib libraries
# used below may change in later releases of the libraries.  This makefile
# builds both statically and dynamically linked executables by default.
# (You need only one set, but for testing it can be handy to have both.)


# macros --------------------------------------------------------------------

#PNGDIR = ../..#		for libpng-x.y.z/contrib/gregbook builds
PNGDIR = ../libpng-win32
PNGINC = -I$(PNGDIR)
PNGLIBd = $(PNGDIR)/libpng.dll.a	# dynamically linked
PNGLIBs = $(PNGDIR)/libpng.a		# statically linked, local libpng

#ZDIR = ../../../zlib-win32#	for libpng-x.y.z/contrib/gregbook builds
ZDIR = ../zlib-win32
ZINC = -I$(ZDIR)
ZLIBd = $(ZDIR)/libzdll.a
ZLIBs = $(ZDIR)/libz.a

# change this to be the path where mingw32 installs its stuff:
W32DIR =
#W32DIR = /usr/local/cross-tools/i386-mingw32msvc
W32INC = -I$(W32DIR)/include
W32LIB = $(W32DIR)/lib/libuser32.a $(W32DIR)/lib/libgdi32.a

CC = gcc
#CC = i386-mingw32msvc-gcc #	e.g., Linux -> Win32 cross-compilation
LD = $(CC)
RM = rm -f
CFLAGS = -O -Wall $(INCS) $(MINGW_CCFLAGS)
# [note that -Wall is a gcc-specific compilation flag ("most warnings on")]
# [-ansi, -pedantic and -W can also be used]
LDFLAGS = $(MINGW_LDFLAGS)
O = .o
E = .exe

INCS = $(PNGINC) $(ZINC) $(W32INC)
RLIBSd = $(PNGLIBd) $(ZLIBd) $(W32LIB) -lm
RLIBSs = $(PNGLIBs) $(ZLIBs) $(W32LIB) -lm
WLIBSd = $(PNGLIBd) $(ZLIBd)
WLIBSs = $(PNGLIBs) $(ZLIBs)

RPNG   = rpng-win
RPNG2  = rpng2-win
WPNG   = wpng

ROBJSd  = $(RPNG)$(O) readpng.pic$(O)
ROBJS2d = $(RPNG2)$(O) readpng2.pic$(O)
WOBJSd  = $(WPNG)$(O) writepng.pic$(O)

RPNGs  = $(RPNG)-static
RPNG2s = $(RPNG2)-static
WPNGs  = $(WPNG)-static

ROBJSs  = $(RPNG)$(O) readpng$(O)
ROBJS2s = $(RPNG2)$(O) readpng2$(O)
WOBJSs  = $(WPNG)$(O) writepng$(O)

STATIC_EXES  = $(RPNGs)$(E) $(RPNG2s)$(E) $(WPNGs)$(E)
DYNAMIC_EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)

EXES = $(STATIC_EXES) $(DYNAMIC_EXES)


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

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

%.pic$(O): %.c
	$(CC) -c $(CFLAGS) -DPNG_BUILD_DLL -o $@ $<


# dependencies --------------------------------------------------------------

all:  $(EXES)

$(RPNGs)$(E): $(ROBJSs)
	$(LD) $(LDFLAGS) -o $@ $(ROBJSs) $(RLIBSs)

$(RPNG)$(E): $(ROBJSd)
	$(LD) $(LDFLAGS) -o $@ $(ROBJSd) $(RLIBSd)

$(RPNG2s)$(E): $(ROBJS2s)
	$(LD) $(LDFLAGS) -o $@ $(ROBJS2s) $(RLIBSs)

$(RPNG2)$(E): $(ROBJS2d)
	$(LD) $(LDFLAGS) -o $@ $(ROBJS2d) $(RLIBSd)

$(WPNGs)$(E): $(WOBJSs)
	$(LD) $(LDFLAGS) -o $@ $(WOBJSs) $(WLIBSs)

$(WPNG)$(E): $(WOBJSd)
	$(LD) $(LDFLAGS) -o $@ $(WOBJSd) $(WLIBSd)

$(RPNG)$(O):	$(RPNG).c readpng.h
$(RPNG2)$(O):	$(RPNG2).c readpng2.h
$(WPNG)$(O):	$(WPNG).c writepng.h

readpng$(O) readpng.pic$(O):	readpng.c readpng.h
readpng2$(O) readpng2.pic$(O):	readpng2.c readpng2.h
writepng$(O) writepng.pic$(O):	writepng.c writepng.h


# maintenance ---------------------------------------------------------------

clean:
	$(RM) $(EXES)
	$(RM) $(ROBJSs) $(ROBJS2s) $(WOBJSs)
	$(RM) $(ROBJSd) $(ROBJS2d) $(WOBJSd)