From: Kevin Sopp (baraclese_at_[hidden])
Date: 2007-12-02 16:40:40
> One can maybe extract some entropy from macros such as __DATE__ and
> __TIME__, using both preprocessing and templates.
These just expand to a string not a number on which one could do some
processing.
The only macro that is usable is __LINE__ and when compiling constant
expressions sizeof can be used, but these provide only a very low
entropy.
In other words I haven't found a way to do this either although it
would be really easy to add a built in uuid macro to the preprocessor
but no one seems to have done that.