Re: [Bug-XBoard] We distribute wrongly compiled WinBoard binaries

[Eric Mullins]

Tim Mann wrote:
> That's odd; I thought %I64 was only used by the Microsoft C library.
> Maybe with -mno-cygwin, gcc is linking scanf to a version from the
> Microsoft runtime library?

That is exactly the problem.  You want to use %I64u/%I64d when linking 
with msvcrt, otherwise %llu/%lld.  Later versions such as msvcr70.dll 
work correctly with the %lld syntax, but using -mno-cygwin causes 
linkage with msvcrt.dll (version 6) which requires %I64 syntax.  The 
data types themselves still must check _MSC_VER, but you can't check 
that for determining the proper u64Display setting.

There's no easy way to determine this either.  The real issue is linking 
against msvcrt, and I don't know a reliable way to be sure.  I find it 
best to check against _WIN32 and use %I64 in that case.  That would 
probably break for borland or watcom or other compilers, but it will 
succeed for gcc in or out of windows, and for ms compilers.