Re: [xml] Building libxml2 as a DLL under MinGW MSYS

[Elizabeth Barham <soggytrousers yahoo com>]

Igor Zlatkovic <igor stud fh-frankfurt de> writes:

> Hi there,

Hi!

> Finally, there was a suggestion about introducing that LIBXML_EXPORT
> macro in every public function declaration. In the unlikely case of
> acceptance, the makefile would not stand in the way anymore.

As far as I can tell, Mingw needs to export/import the global data to
work correctly with DLL's. I added this to config.h to allow the build
of xmllint and the test programs:

#ifdef DLL_EXPORT
#define LIBXML_DLL_IMPORT  __declspec(dllexport)
#else
#define LIBXML_DLL_IMPORT  __declspec(dllimport)
#endif

config.h may not be the best place for these to go but I was just
trying to make the xmllint et. al. compile.

The deal is that mingw needs the global *data* to be wrapped with the
__declspec(dllexport | dllimport) and to the best of my understanding
the functions are not nearly as big of a deal and do not need them.

> * Separate the winsock error codes from win32config.h in their own file and
> #include that file in win32config.h. This would equally not affect any other
> platform. That step would change nothing now, but would allow for avoiding
> duplicate information incase the native and the cross-compiler mingw would
> do their configuration through the GNU autoconf.

Awesome!

> The double compilation run I have tested on xmlsec and it works fine. Note
> that I plan to do this on both libxml and libxslt.
>
> Any objections, suggestions, cries, cheers?

I think you are doing a wonderful job and thank you for your
consideration of those, like myself, who like using mingw.

Elizabeth