#
# Makefile for Cygwin. This builds a DLL that depends on Cygwin DLL;
# for DLLs independent of Cygwin DLL, use Makefile.nocygwin instead.
#
CC = gcc

DEBUG = -g -O2
# The -mrtd flag tells the compiler to use the PASCAL or "stdcall" calling
# convention required by VBA/Excel/etc.
CFLAGS = -mrtd $(DEBUG)

AS = as
DLLTOOL = dlltool
DLLWRAP = dllwrap

#
# Various targets to build.
#
DLL_NAME = cdll.dll
DLL_EXP_DEF = cdll.def

all: $(DLL_NAME)

#
# sources, objects, etc. 
#
SRCS  = $(wildcard *.c)
OBJS := $(OBJS:.c=.o)

#
# DLL related variables. These are used when building the DLL. See later.
#

# any special flags that you need to pass to the F77 compiler when building 
# the DLL. (lots of software need _DLL defined).
DLL_CFLAGS = -DBUILDING_DLL=1
# This is where you pass linker flags, such as library search path, alternate
# entry point, etc. The -s flag strips the final DLL. The alternate entry
# point is needed since this DLL will be loaded by a non-cygwin application.
DLL_LDFLAGS = -s --entry __cygwin_noncygwin_dll_entry@12
# any extra libraries that your DLL may depend on.
DLL_LDLIBS = 

#
# your sources etc that go into the DLL.
#
DLL_SRCS = cdll.c 
DLL_OBJS = cdll.o 

###
#
# Making DLL
#
###

#
# Note that we let dllwrap create both the DEF and IMPORT library in
# one shot. No need to run dlltool anymore.
#
DLLWRAP_FLAGS = --export-all --output-def $(DLL_EXP_DEF) \
	--driver-name $(CC)

$(DLL_NAME) $(DLL_EXP_DEF): $(DLL_OBJS)
	$(DLLWRAP) $(DLLWRAP_FLAGS) -o $(DLL_NAME) \
	    $(DLL_OBJS) $(DLL_LDFLAGS) $(DLL_LDLIBS)

#
# dependencies.
#

cdll.o: cdll.c

#
# default rules for building DLL objects. Note that client programs (ie.,
# the ones that *use* the DLL) have to be compiled without the DLL_CFLAGS
# flags.
#
.c.o:
	$(CC) -c $(CPPFLAGS) $(DLL_CFLAGS) $(CFLAGS) -o $@ $<

clean:
	-rm -f $(OBJS) $(DLL_OBJS) $(DLL_NAME) $(DLL_EXP_DEF)