gcc が alternatives を使わないわけ

http://d.ma-aya.to/?date=20050707#p04

The symlinks in /usr/bin (gcc, g++, ...) are not handled using the Debian
alternative mechanism. There are differences in the architecture specific
ABI on some architectures and the C++ ABI differs as well. Having the
symlinks managed by alternatives doesn't allow reliable builds with the
same major/minor version of the compiler. To use another compiler version,
set the appropriate environment variables as described above in the section
"Practical implications".

めも