Building mingw32 DLLs without -no-undefined?

[Simon Josefsson]

Hi!  I'm able to build a win32 DLL of libidn using libtool and
mingw32, but it didn't work with libgsasl.  The difference was that
libidn specified a -no-undefined where as libgsasl didn't.  libgsasl
depend on libidn, so that is understandable.

`-no-undefined'
     Declare that OUTPUT-FILE does not depend on any other libraries.
     Some platforms cannot create shared libraries that depend on other
     libraries (*note Inter-library dependencies::).

Is it possible to build a DLL that depend on other libraries?

Since gsasl do depend on libidn, it seem incorrect to specify
-no-undefined in libgsasl, however, with parameter, libtool is able to
build a libgsasl DLL.  I haven't tested it though.

In libidn, libtool installed Libidn.dll, libidn.a, and libidn.dll.a.
Maybe this is just a matter of making libtool pick up a better libidn
to link with?  Currently it just use -lidn:

/bin/sh ../libtool --tag=CC --mode=link i586-mingw32msvc-gcc  -g -O2   -o 
libgsasl.la -rpath /home/jas/w32root/lib -version-info 9:8:2 
-export-symbols-regex '^(gsasl|GSASL).*' init.lo done.lo register.lo error.lo 
version.lo callback.lo property.lo supportp.lo suggest.lo listmech.lo xstart.lo 
xstep.lo xfinish.lo xcode.lo base64.lo md5pwd.lo crypto.lo saslprep.lo 
obsolete.lo ../gl/libgl.la  -L/home/jas/w32root/lib -lidn 
../external/libgsasl-external.la ../anonymous/libgsasl-anonymous.la 
../plain/libgsasl-plain.la ../login/libgsasl-login.la 
../cram-md5/libgsasl-cram_md5.la ../digest-md5/libgsasl-digest_md5.la   
../securid/libgsasl-securid.la
...

Thanks for any ideas in getting usable win32 libraries are appreciated.

Thanks,
Simon