[Bug c++/52922] failed to build gcc 4.7 on SL6.1

[scott at smedleyfamily dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52922

--- Comment #7 from scott at smedleyfamily dot net 2012-04-10 23:19:58 UTC ---
Thanks Jonathan,

> No, in general you can't use GCC built for one target on a different target.

I realise this is off-topic but I would love to know: what is causing this
limitation?

I thought by building gcc on the "oldest" architecture I could expect ABI
backward-compatibility on the "newer" architectures.

Thanks for your help.

Scott.