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26
votes
6answers
23k views

Can we get compiler information from an elf binary?

Is there some chance to know how a binary was built, under Linux? (and or other Unix) Compiler, version, time, flags etc... I looked at readelf and couldn't find much, but there might be other ways ...
55
votes
4answers
3k views

How to compile the C compiler from scratch, then compile Unix/Linux from scratch

Let's say I work for a large services organisation outside the US/UK. We use UNIX and Linux servers extensively. Reading through this article it mentions that it would be easy to insert a backdoor ...
2
votes
1answer
366 views

What flags are used to compile debian stable packages?

Ubuntu wiki states that its packages are compiled with secure flags and secure kernel options. I cannot find this information about debian. See https://wiki.ubuntu.com/CompilerFlags