makefile.cygwin

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#
# Extra rule sets for making shared module DLLs for Cygwin 1.x
# 
# On Cygwin OS the user needs to run twice "make" if shared modules have 
# been requested using the --enable-shared=<module> configure flag.
# This is because when we pass the module mod_foo.c we have no import 
# library, usually src/libhttpd.dll to link against in this case. So the
# two "make" runs do the following:
#
#   1st run: builds all static modules and links everything to the 
#            shared core DLL, which is also the import library for any
#            further shared modules, including the apxs tool mechanism.
#
#   2nd run: builds *only* the shared module DLLs specified by the 
#            --enable-shared configure switch and of course updates
#            the buildmark.o and hence httpd's build date.
#
# Any suggestions in getting this done in one step are highly welcome.
# Stipe Tolj <[e-mail]>
#

# overwrite variables that are defined in previous makefile
LD_SHLIB=$(CC)
LDFLAGS_SHLIB=--shared

define shared_dll
  	$(LD_SHLIB) $(LDFLAGS_SHLIB) -o $*.dll $(<:%.c=%.o) $(LIBS_SHLIB) \
        $(SRCDIR)/$(SHCORE_IMPLIB) $(LIBS1)
endef

%.def : %.c
	touch $*.def

%.lo : %.c
	$(CC) -c $(INCLUDES) $(CFLAGS) $(CFLAGS_SHLIB) $< && mv $*.o $*.lo

%.dll : %.lo
	@if [ -f "$(SRCDIR)/$(SHCORE_IMPLIB)" ]; then \
        rm -f $(SRCDIR)/$(SHCORE_IMPLIB).$$; \
        echo $(shared_dll); \
		$(shared_dll); \
	else \
        if [ ! -f "$(SRCDIR)/$(SHCORE_IMPLIB).$$" ]; then \
	      echo "+--------------------------------------------------------+"; \
		  echo "| There is no shared core 'libhttpd.dll' available!      |"; \
		  echo "|                                                        |"; \
		  echo "| This is obviously your first 'make' run with configure |"; \
		  echo "| flag SHARED_CORE enabled and shared modules.           |"; \
		  echo "|                                                        |"; \
		  echo "| You will have to re-run 'make' after this run builds   |"; \
		  echo "| the required shared import library!                    |"; \
		  echo "+--------------------------------------------------------+"; \
		  sleep 10; \
          touch $(SRCDIR)/$(SHCORE_IMPLIB).$$; \
        fi; \
	fi;