linux-from-scratch

Is building a Linux From Scratch system good for learning about operating systems?

Or learning about C/C++, Linux development, or anything else? Or is it just something that might be fun or useful for some people to do? ...

C compiler cannot create executables when trying to build Binutils

I am trying to build Linux From Scratch, and now I am at chapter 5.4, which tells me how to build Binutils. I have binutils 2.20's source code, but when I try to build it: time { ./binutils-2.20/configure --target=$LFS_TGT --prefix=/tools --disable-nls --disable-werror ; } it gives me an error: checking build system type... i686-pc-l...