Mailing-List: contact cygwin-help AT sourceware DOT cygnus DOT com; run by ezmlm List-Unsubscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT sourceware DOT cygnus DOT com Delivered-To: mailing list cygwin AT sourceware DOT cygnus DOT com Message-ID: <37BAE433.C330099C@mcd.alcatel.be> Date: Wed, 18 Aug 1999 18:49:55 +0200 From: Richard X-Mailer: Mozilla 4.61 [en] (WinNT; I) X-Accept-Language: en MIME-Version: 1.0 To: "cygwin AT sourceware DOT cygnus DOT com" Subject: Imake and DLLs under Cygwin Content-Type: multipart/alternative; boundary="------------214511E6729F99BAED54F939" --------------214511E6729F99BAED54F939 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit I have an application which I've successfully rebuilt on Solaris. It was configured with imake. I now have a requirement to port it to Cygwin. Using the imake from my X11 distribution there have been various errors due to the Cygwin configuration files (cygwin.tmpl, cygwin.rules ... in X11R6.4/lib/X11/config) being somewhat out-of-date, but these have been solved. The problem comes with the attempt to produce a 'shared library' (DLL on Cygwin of course). The Imakefile uses the imake rule SharedLibraryTarget(...): --------------------------- #define SharedLibraryTarget(libname,rev,solist,down,up) @@\ AllTarget(Concat3(lib,libname,.dll)) @@\ @@\ CppFileTarget(libname.def,libname-def.cpp,-DLIBRARY_VERSION=rev,$(ICONFIGFILES)) @@\ --------------------------- which produces the following make rules: --------------------------- service.def:: service-def.cpp $(ICONFIGFILES) $(RM) $@ $(CPP) -DLIBRARY_VERSION=1 $@ clean:: $(RM) service.def junk.c: echo "#include " >junk.c echo "DECLARE_CYGWIN_DLL(dll_main);" >>junk.c echo "int WINAPI dll_main(HANDLE a, DWORD reason, void *q)" >>junk.c echo "{ return 1; }" >>junk.c libservice.dll: $(OBJS) junk.o service.def $(RM) libservice.a $(RM) libservice.dll if [ -f $(BASE_COUNTER) ]; then true; \ else echo 0x67000000 > $(BASE_COUNTER); fi dllwrap -s --def service.def --output-lib libservice.a -o libservice.dll $(OBJS) junk.o $(REQUIREDLIBS) -image-base `cat $(BASE_COUNTER)` IMAGE_LENGTH=`objdump -x libservice.dll |awk '/SizeOfImage/ {print "0x"$$2}'`; \ export IMAGE_LENGTH=`expr '(' \`printf %u $$IMAGE_LENGTH\` / 65536 + 1 ')' '*' 65536` ; \ export IMAGE_BASE=`cat $(BASE_COUNTER)`; \ printf 0x%x `expr \`printf %u $$IMAGE_BASE\` + $$IMAGE_LENGTH` > $(BASE_COUNTER) $(_NULLCMD_) ---------------------------- The problem is that I don't have any service-def.cpp, and I don't know the correct format for it. When I write my own 'service.def' and exclude the 'service.def' rule from the makefile, it fails with: dlltool: unrecognized option `--exclude-symbol=_cygwin_dll_entry AT 12' My dllwrap is version 0.2.4 and dlltool 2.9.4. When I copy the 'dllwrap' line to the command line it runs without error (surprisingly), but the nm says 'No symbols in "libservice.dll"'. Has anyone been though this sort of thing before? --------------214511E6729F99BAED54F939 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit I have an application which I've successfully rebuilt on Solaris. It was configured with imake.
I now have a requirement to port it to Cygwin. Using the imake from my X11 distribution there have been various errors due to the Cygwin configuration files (cygwin.tmpl, cygwin.rules ... in X11R6.4/lib/X11/config) being somewhat out-of-date, but these have been solved.

The problem comes with the attempt to produce a 'shared library' (DLL on Cygwin of course). The Imakefile uses the imake rule SharedLibraryTarget(...):
---------------------------
#define SharedLibraryTarget(libname,rev,solist,down,up)                 @@\
AllTarget(Concat3(lib,libname,.dll))                                    @@\
         @@\
CppFileTarget(libname.def,libname-def.cpp,-DLIBRARY_VERSION=rev,$(ICONFIGFILES)) @@\
---------------------------

which produces the following make rules:

---------------------------
service.def:: service-def.cpp $(ICONFIGFILES)
$(RM) $@
$(CPP) -DLIBRARY_VERSION=1 <service-def.cpp | sed -e '/^# *[0-9][0-9]* *.*$$/d' -e\ '/^XCOMM$$/s//#/' -e '/^XCOMM[^a-zA-Z0-9_]/s/^XCOMM/#/' >$@

clean::
$(RM) service.def

junk.c:
echo "#include <cygwin/cygwin_dll.h>" >junk.c
echo "DECLARE_CYGWIN_DLL(dll_main);" >>junk.c
echo "int WINAPI dll_main(HANDLE a, DWORD reason, void *q)" >>junk.c
echo "{ return 1; }" >>junk.c
libservice.dll: $(OBJS) junk.o service.def
$(RM) libservice.a
$(RM) libservice.dll

if [ -f $(BASE_COUNTER) ]; then true; \
else echo 0x67000000 > $(BASE_COUNTER); fi
dllwrap -s --def service.def --output-lib libservice.a -o libservice.dll $(OBJS) junk.o $(REQUIREDLIBS) -image-base `cat $(BASE_COUNTER)`
IMAGE_LENGTH=`objdump -x libservice.dll |awk '/SizeOfImage/ {print "0x"$$2}'`; \
export IMAGE_LENGTH=`expr '(' \`printf %u $$IMAGE_LENGTH\` / 65536 + 1 ')' '*' 65536` ; \
export IMAGE_BASE=`cat $(BASE_COUNTER)`; \
printf 0x%x `expr \`printf %u $$IMAGE_BASE\` + $$IMAGE_LENGTH` > $(BASE_COUNTER)
$(_NULLCMD_)
----------------------------

The problem is that I don't have any service-def.cpp, and I don't know the correct format for it.

When I write my own 'service.def' and exclude the 'service.def' rule from the makefile, it fails with:
dlltool: unrecognized option `--exclude-symbol=_cygwin_dll_entry AT 12'

My dllwrap is version 0.2.4 and dlltool 2.9.4.

When I copy the 'dllwrap' line to the command line it runs without error (surprisingly), but the nm says 'No symbols in "libservice.dll"'.

Has anyone been though this sort of thing before? --------------214511E6729F99BAED54F939--