No. There's existing tooling to get reproducible builds with those compilers, and it's fairly easy to produce output that doesn't include full file paths. Passi

No. There's existing tooling to get reproducible builds with those compilers, and it's fairly easy to produce output that doesn't include full file paths. Passing relative paths to the compiler is one of the more common ways to use them, and this only leaks relative pathnames which don't reveal information about the system they were compiled on. You can also redact information like __DATE__ quite easily, just by adding e.g. -D__DATE__=\"redacted\" to your command-line. Bazel does this by default because using __DATE__ interferes with reproducible builds. Other projects like Debian have also made efforts to make their builds reproducible. Not 100% of Debian packages are reproducible, but a significant percentage of them are, and using GCC or Clang is not a barrier.