Re: Octave / cygwin / dynamic linking - success

[Andy Adler]

Paul Kienzle wrote:

> I haven't looked at the details of what you've done, but I successfully
> built a lite-kernel version of octave yesterday, and spent last night 
> trying to update the configure scripts to do it automatically.  Here is
> what I came up with.
>  
Great. Try to see if you can get *oct files working with your patch.  It
may simply require a link to the octave *dlls in the makefile

If not, I propose letting your patches get integrated first, then I'll 
see whats
left of my stuff to integrate.

> DLLs must be installed in the bin directory and a new file, libxxx.dll.a,
> must be installed in the lib directory.  I call these the load and link
> forms respectively.  I tag them with SHLBIN and SHLLIB which I define in
> configure.
AFAIK, cygwin does not require windows loader libraries (*.a or *.lib ) 
files for dlls.
(unlike MSVC++). You can directly link against the dll, and it will 
figure out what to do.

> Although the C++ compiler prepends an underscore, cygwin's dlsym
> automatically adds it, so the configure test for CXX_PREPENDS_UNDERSCORE in
> aclocal.m4 is leading us astray.
>  
I noticed this, too.


The only other change that seemed to be required what to eliminate the 
test of
error_state in DEFINE_FUN_INSTALLER_FUN3. I spent quite a bit
of time tracing error_state through the various calls during DLD function
definition, and it seemed to suddenly become non zero. I suspect this may
be because the *dld function linked to the octave dll doesn't share
memory the same way as proper *nix style dynamic linking.

This is great - soon we can have a proper working windows build.
World domination must then be just around the corner ;-).

--
Andy Adler address@hidden




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