At least this one

  Interestingly, the build host architecture does not matter. 
  In other words, builds are reproducible across cross-
  compiling.

Is there a list of what compilers embed what identifier to binaries? Thinking about it compiler could embed CPU ID, MAC address, etc to make you traceable - but do they? (like color printer/photocopier embed almost invisible code on every age, to make you traceable).