compiling error

[Marcel]

hello, can anybody help me out. i'm trying to compile kfw-2.5-src on a windows XP machine 
with visual studio 6 c++. but when I try to compile the source I always got the following 
message. I already looked in google but didn't find any solution. 

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Microsoft (R) Program Maintenance Utility   Version 6.00.8168.0
Copyright (C) Microsoft Corp 1988-1998. All rights reserved.

        cd crc32
Making in crypto\crc32
        NMAKE -

Microsoft (R) Program Maintenance Utility   Version 6.00.8168.0
Copyright (C) Microsoft Corp 1988-1998. All rights reserved.

        cl    -I.\..\..\..\include -I.\..\..\..\include\krb5  -DKRB5_PRIVATE=1 -
DWIN32_LEAN_AND_MEAN -DKRB5_DEPRECA
TED=1 /Os /MD -nologo /W3 -Fdobj\i386\rel\\ -FD  -Foobj\i386\rel\\ -c ...
crc32.c
.\..\..\..\include\k5-int.h(509) : error C2143: syntax error : missing ')' before '*'
.\..\..\..\include\k5-int.h(509) : error C2081: 'socklen_t' : name in formal parameter list illegal
.\..\..\..\include\k5-int.h(509) : error C2143: syntax error : missing '{' before '*'
.\..\..\..\include\k5-int.h(509) : error C2059: syntax error : ')'
.\..\..\..\include\k5-int.h(509) : error C2059: syntax error : ';'
.\..\..\..\include\k5-int.h(1674) : error C2143: syntax error : missing ')' before '*'
.\..\..\..\include\k5-int.h(1674) : error C2081: 'socklen_t' : name in formal parameter list illegal
.\..\..\..\include\k5-int.h(1674) : error C2143: syntax error : missing ';' before '*'
.\..\..\..\include\k5-int.h(1674) : error C2059: syntax error : '*'
.\..\..\..\include\k5-int.h(1674) : error C2059: syntax error : ')'
.\..\..\..\include\k5-int.h(1691) : error C2059: syntax error : '}'
.\..\..\..\include\k5-int.h(1698) : error C2143: syntax error : missing ')' before '*'
.\..\..\..\include\k5-int.h(1698) : error C2143: syntax error : missing '{' before '*'
.\..\..\..\include\k5-int.h(1698) : error C2059: syntax error : ','
.\..\..\..\include\k5-int.h(1698) : error C2059: syntax error : ')'
.\..\..\..\include\k5-int.h(1721) : error C2143: syntax error : missing ')' before '*'
.\..\..\..\include\k5-int.h(1721) : error C2081: 'socklen_t' : name in formal parameter list illegal
.\..\..\..\include\k5-int.h(1721) : error C2143: syntax error : missing '{' before '*'
.\..\..\..\include\k5-int.h(1721) : error C2059: syntax error : ')'
.\..\..\..\include\k5-int.h(1721) : error C2059: syntax error : ';'
NMAKE : fatal error U1077: 'cl' : return code '0x2'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual 
Studio\VC98\Bin\NMAKE.EXE"' : return code '0x2'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual 
Studio\VC98\Bin\NMAKE.EXE"' : return code '0x2'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual 
Studio\VC98\Bin\NMAKE.EXE"' : return code '0x2'
Stop.

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i looked at the source code, but i'm not very familiar with c! thx