The ability to recreate a binary image from the same set of source files and getting that binary to be identical to the package-provided binary. This is useful

The ability to recreate a binary image from the same set of source files and getting that binary to be identical to the package-provided binary. This is useful form of ensuring that nothing is amiss during compile/link time. Today’s GNU toolchain clutters the interior of binary files with random hash values, full file path (that you couldn’t recreate … easily), and random tmpfile directories. The idea is to make it easier to verify a binary, compare it with earlier-built-but-same-source binary, or to be able to reverse engineering it (and catch unexpected changes in code).