[oynqr]

The minimum size for unsigned long is 4 bytes

[dataflow]

Oh I didn't realize its size varies on x86 and x64... I thought it's always 64-bit under compilers that target Linux! Today I learned...

[tomsmeding]

There is a difference between 'long' and 'long long'. I believe the latter is always 64 bits on Linux.

[dataflow]

I'm indeed aware of that one :-)

[jamesfinlayson]

I think the size can vary by compiler rather than just by architecture.

[dataflow]

Yeah it can but in practice systems have a canonical model in their official headers.

[gpderetta]

And yet msvc and gcc disagree on sizeof(long) on AMD64.

Edit: but of course you meant OS with system, not hardware architecture :)

[dataflow]

MSVC on... Linux AMD64?

[gpderetta]

:) to be fair I did note my misunderstanding in my edit.