Linking problems with BIND8's libbind on Windows.

[Danny Mayer]

At 02:54 PM 8/25/03, Sudhir Mohith wrote:




>Hello,
>
>I am using the BIND 8.4.1 libbind code as part of a naming service project
>on Windows (I'm using Visual Studio 6.0). The primary routines I need are
>res_init() and res_query(). I started by building the entire BIND tree
>which completed fine and it built the libbind.dll, libbind.lib,
>libbind.exp, libbind.map, etc.
>
>Now to get my code to compile, I needed to struggle a little and figured
>out that I didn't need to #include resolv.h and netdb.h but could just
>#include Windows' windows.h and BIND's binwsock.h and that compiled ok.
>However, I am currently having problems when linking my code with the
>libbind library as per:
>
>       link.exe /DEBUGTYPE:CV /NODEFAULTLIB -debug:full -debugtype:cv
>/NODEFAULTLIB /INCREMENTAL:NO /PDB:NONE /RELEASE /NOLOGO
>-subsystem:console,4.0 /out:..\obj\winnt\tests\test.exe
>..\obj\winnt\file1.obj ..\obj\winnt\file2.obj ..\obj\winnt\file3.obj
>libbind.lib msvcrt.lib oldnames.lib kernel32.lib  ws2_32.lib mswsock.lib
>advapi32.lib
>file2.obj : error LNK2001: unresolved external symbol _res_init at 0
>file2.obj : error LNK2001: unresolved external symbol _res_query at 20
>..\obj\winnt\tests\test.exe : fatal error LNK1120: 2 unresolved externals
>
>Now when I do a dumpbin /exports on the libbind.lib that was produced in my
>Release directory as part of the BIND build (and which I am linking with
>above), I do not see the __res_init and __res_query symbols there. However,
>if I run a dumpbin /exports on the libbind.dll that was created at BIND
>build time, then those symbols are there.

Check libbind.def for the files. __res_init is defined there. __res_query
is not, at least in 8.3.4 which is the last BIND 8 I built. For some reason
you don't have an extra underscore ("_") in your file2.c. Make sure you
are using STDC (standard C). You will probably need to add at least
__res_query to libbind.def.

Danny

>So my question is - can I get my application to build with the static
>libbind.lib by rebuilding the library with some other option (which will
>include those missing symbols in the *.lib file) or do I need to use the
>libbind.dll to link with my application and if so how would I go about
>doing that.
>
>Thanks, Sudhir