Re: Building libssh with GSSAPI support on Windows?

[Aris Adamantiadis <aris@xxxxxxxxxx>]

Hi Adam,

I'm afraid I don't have a good answer. Afaik no one tried to compile 
GSSAPI support on windows before. The problems you have seem to come 
from the windows headers themselves. Maybe try to remove a few 
network-related headers in gssapi.c until it doesn't complain about 
redefinitions.

For the other warnings, you can ignore them even if it would be better 
in the long run to fix them.


Aris


Le 29/07/21 à 10:15, Kerrison, Adam a écrit :
> Hello
>
> As the subject says, I am attempting to build libssh 0.9.5 with GSSAPI 
> support on Windows. From what I’ve figure out, this hasn’t been done 
> before, as the FindGSSAPI.cmake module doesn’t even attempt to find 
> the libs on anything but UNIX.
>
> I’ve got the Kerberos for Windows package installed so I’ve added a 
> section to the FindGSSAPI.cmake module which allows the cmake 
> generator to run:
>
> if (WIN32)
>
>     if (EXISTS "C:\Program Files\\MIT\\Kerberos")
>
>         set(GSSAPI_FLAVOR_MIT TRUE)
>
>         set(GSSAPI_ROOT_DIR "C:\\Program Files\\MIT\\Kerberos")
>
>         set(GSSAPI_LIBRARIES "gssapi64.lib krb5_64.lib comerr64.lib")
>
>     endif()
>
> endif (WIN32)
>
> It reports GSSAPI: ON 😊
>
> However, when the actual build runs its all fine until it reaches the 
> gssapi.c then it just fails with a myriad of warnings and errors. Some 
> examples:
>
> C:\Program Files (x86)\Windows Kits\8.1\Include\shared\ws2def.h(100): 
> warning C4005: 'AF_IPX': macro redefinition 
> [C:\src\buildroot\src\ssh.vcxproj]
>
>   C:\Program Files (x86)\Windows Kits\8.1\Include\um\winsock.h(452): 
> note: see previous definition of 'AF_IPX'
>
> C:\Program Files (x86)\Windows Kits\8.1\Include\shared\ws2def.h(421): 
> error C2059: syntax error: 'constant' [C:\src\buildroot\src\ssh.vcxproj]
>
> C:\Program Files (x86)\Windows Kits\8.1\Include\um\winsock2.h(2499): 
> error C2375: 'WSACancelBlockingCall': redefinition; different linkage 
> [C:\src\buildroot\src\ssh.vcxproj]
>
> Also, quite a few other files complain about a possible loss of data 
> (it’s a 64 bit build), for example:
>
> C:\src \libssh-0.9.5\src\base64.c(191): warning C4244: '=': conversion 
> from '__int64' to 'unsigned int', possible loss of data 
> [C:\src\buildroot\src\ssh.vcxproj]
>
> Has anyone tried to build libssh with GSSAPI support on Windows? Does 
> anyone have a clue what is wrong here? I’ve built plenty of packages 
> on Linux and Windows but I’m not very experienced with MS Visual 
> Studio and the vxproj files seem like voodoo to me ☹
>
> Thanks
>
> Adam
>
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