To make it easier to reproduce builds of software and entire GNU/Linux distributions, RMS had the idea of adding a warning to GCC that warns about the use of __DATE__ and __TIME__.
Short of "interesting" changes to the environment or #defining these two, as soon as a program uses __DATE__ or __TIME__ at least once, builds of the program will differ for that reason alone. (There are others, but one step at a time; this is not the point of this mail). I was thinking a new warning -Wdate-time or similar could address this. Any volunteers implementing this? Gerald
