Roumen Petrov wrote:
> Michael Stahl wrote:
>> Rob Richards wrote:
>>> Michael Stahl wrote:
>>>> Rob Richards wrote:
>>>>
>>>>>>
>>> </snip>
>>>>>>
>>>>>>
>>>>> I think I finally understand what you are trying to do. You are building
>>>>> on Win 2003 with VS 2005 and then trying to use the lib on on Win2K or
>>>>> lower and it is there that it is failing to link?
>>>>>
>>>> well, it fails to link with vs 2005 already because libxml (using 2.6.31
>>>> here) is not linked against ws2_32.dll, so ld (or whatever msft calls its
>>>> equivalent) complained that getaddrinfo and freeaddrinfo are undefined
>>>> symbols.
>>>>
>>> I get it now and thought that was only an issue with VS 2008. Can you
>>> try building from SVN or even a snapshot. The lib was added just after
>>> the .31 release.
>> ok, i have built a snapshot (downloaded friday iirc). building works, and
>> the dll is linked against ws2_32.dll.
>>
>>>>> Can you try the following patch?
>>>>> Index: wsockcompat.h
>>>>> ===================================================================
>>>>> --- wsockcompat.h (revision 3721)
>>>>> +++ wsockcompat.h (working copy)
>>>>> @@ -21,6 +21,7 @@
>>>>>
>>>>> /* Check if ws2tcpip.h is a recent version which provides getaddrinfo()
>>>>> */
>>>>> #if defined(GetAddrInfo)
>>>>> +#include <wspiapi.h>
>>>>> #define HAVE_GETADDRINFO
>>>>> #endif
>>>>> #endif
>>>>>
>>>> ah yes, that seems to work fine here, and is obviously the cleaner way to
>>>> do it.
>>>>
>>> If the build from SVN fixes the initial problem, can you try using it on
>>> w Win2K machine? It's possible that the patch might not be needed though
>>> after more research I have doubts. I'm looking around here for an old OS
>>> to test on as well. I'm pretty sure I have an old VM image lying around
>>> here somewhere.
>> so today i finally got access to a win2k machine. the result:
>> with 2.6.31+my patch, the application runs.
>> with the snapshot, the application fails to run, and displays a message
>> box complaining that ws2_32.dll could not be found.
>>
>> so, i would suggest you revert the patch that introduced linking to
>> ws2_32.dll, and use wspapi.h instead.
>>
>> regards
>> michael
>>
>
> Michael,
> If "my patch" is you patch first posted to the list I think that you
> understand that patch break libxml2 build on other platforms. Is you
> "suggestion" to broke libxml2 intentional ?
errm, no, by "my patch" i meant the general approach of including the
header wspiapi.h _instead_of_ linking against ws2_32.dll, however that may
be implemented so that it works on all supported platforms. i have merely
told how i could get it to work on my setup (building on win2k3 and
deploying on win2k), and that the status quo does _not_ work in this
setup. i will leave the details to those who actually know something about
win32.
>
> Rob,
> may be the problem can be resolved with this proof of concept code:
> do {
> /* resolve getaddrinfo at run time instead at compile time */
> h = LoadLibraryA("ws2_32");
> if (h != NULL) {
> f = GetProcAddress(h, "getaddrinfo");
> if (f == NULL) {
> FreeLibrary(h);
> h = NULL;
> } else {
> /* */
> }
> }
> h = LoadLibraryA("wship6");
> if (h != NULL) {
> f = GetProcAddress(h, "getaddrinfo");
> if (f == NULL) {
> FreeLibrary(h);
> h = NULL;
> } else {
> call f ....
> }
> }
> /* fail-back to gethostbyname */
> ....
> } while (0);
>
>
> As I understand wship6 is not default on platforms before nt 5.1.
>
> Roumen
well, the msdn page for getaddrinfo claims that this is basically what the
macro in wspiapi.h does.
michael
--
"Experience is that marvelous thing that enables you recognize a
mistake when you make it again." -- F. P. Jones
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