Embed timestamp in object code at compile time with C++
16.8 Predefined macro names [cpp.predefined]
1 The following macro names shall be defined by the implementation:__LINE__
The line number of the current source line (a decimal constant).__FILE__
The presumed name of the source file (a character string literal).__DATE__
The date of translation of the source file (a character string literal of the form "Mmm dd yyyy", where the names of the months are the same as those generated by the asctime function, and the first character of dd is a space character if the value is less than 10). If the date of translation is not available, an implementation-defined valid date is supplied.__TIME__
The time of translation of the source file (a character string literal of the form "hh:mm:ss" as in the time generated by the asctime function). If the time of translation is not available, an implementation-defined valid time is supplied.__STDC__
Whether__STDC__
is predefined and if so, what its value is, are implementation-defined.__cplusplus
The name__cplusplus
is defined to the value 199711L when compiling a C++ translation unit.
You want __TIME__
and possibly __DATE__
.
You could use __DATE__
and __TIME__
.