Hi there

configure checks whether "long long" is supported but in the code depending on 
that check "unsigned long long" is used, sometime pretty well hidden.

from configure.in:
AC_CACHE_CHECK([for long long],samba_cv_have_longlong,[
AC_TRY_RUN([#include <stdio.h>
main() { long long x = 1000000; x *= x; exit(((x/1000000) == 1000000)? 0: 1); }]
,
samba_cv_have_longlong=yes,samba_cv_have_longlong=no,samba_cv_have_longlong=cros
s)])
if test x"$samba_cv_have_longlong" = x"yes"; then
    AC_DEFINE(HAVE_LONGLONG,1,[Whether the host supports long long's])
fi

just run a 'grep HAVE_LONGLONG' on all .c and .h files to find where it's used.

Main and most obvious example is source/include/include.h:
#if defined(HAVE_LONGLONG)
#define SMB_BIG_UINT unsigned long long
#define SMB_BIG_INT long long
#define SBIG_UINT(p, ofs, v) (SIVAL(p,ofs,(v)&0xFFFFFFFF), SIVAL(p,(ofs)+4,(v)>>
32))
#else
#define SMB_BIG_UINT unsigned long
#define SMB_BIG_INT long
#define SBIG_UINT(p, ofs, v) (SIVAL(p,ofs,v),SIVAL(p,(ofs)+4,0))
#endif

My idea for a fix in configure.in, just test for unsigned long long instead:
AC_CACHE_CHECK([for long long],samba_cv_have_longlong,[
AC_TRY_RUN([#include <stdio.h>
main() { unsigned long long x = 1000000; x *= x; exit(((x/1000000) == 1000000)? 
0: 1); }]
,
samba_cv_have_longlong=yes,samba_cv_have_longlong=no,samba_cv_have_longlong=cros
s)])
if test x"$samba_cv_have_longlong" = x"yes"; then
    AC_DEFINE(HAVE_LONGLONG,1,[Whether the host supports long long's])
fi

I guess no compiler would be so sick to support unsigned long long but not long 
long....

Bye, Jojo