Standardized instructions for cross-compiling toolchain?

[Andrew Haley]

On 05/04/2016 05:12 PM, Michael Habibi wrote:
> However, my question is more general than that. Are there some
> widely-used, accepted steps for building a cross-compiling toolchain
> with gcc? I noticed that crosstool-ng does a 3 stage build, where it
> builds an initial gcc for libc start files, then rebuilds gcc for
> libc, then rebuilds gcc yet again with libc. Other blogs suggest that
> two stages are enough. I settled on doing a 2 stage build. I think my
> steps are fine, but I think some of my configure options may need help
> (prefix vs sysroot vs prefix+target, etc). But every set of
> instructions I look at are different, and it seems no two blog posts,
> pdfs, wikis have landed on the same procedure.

That's the hard way.  The easy way is to grab the root filesystem from
your target machine and configure --with-sysroot=<target filesystem>.

You really don't have to build libc for your target, and if your
target already exists and has a libc you should not do so.

Andrew.