how to retrieve the info of the compiler having built an ELF executable

Sometime there happens to be a need for retrieving what is the compilation information, compiler version, say, of the compiler that was previously used for building an ELF executable.

There are two ways, no matter whether they are the real good ones.

1) objdump -s --section .comment  <the executable>

2) strings -a <the executable> | grep -i -E "gcc|cl| $other possible clue for the compiler name"