I'm playing around with the kqemu accelerator for the QEMU virtualization software. I can't remember which version of gcc I used to build my kernel. I have 3.4.6 and 4.1.1 on this (Gentoo) system. I seem to remember there is some command I can run against binaries that will tell me what gcc (and linker, etc..) built them. so far my searches have only turned up:
gcc -v (Shows me what version of GCC I have)
and
uname -a (which shows me all the kernel info except which GCC built it)
Any suggestions?