Building Relocatable GCC

[NightStrike]

On Tue, Jan 25, 2011 at 5:19 PM, Kyle Girard <kyle@kdmanalytics.com> wrote:
>
> I'm trying compile a version of gcc-4.5 on linux x86 for linux x86 which
> is relocatable but I'm having difficulty.
>
> Does anyone have an example of how to build such a relocatable gcc?
>
> I've been building binutils, and gcc-4.5 over and over
> with many different options.  After reading the docs I thought the key
> configure options are the --with-sysroot=/my/root and --prefix=/my/root
> for both binutils and gcc with those options and it should be
> relocatable but I've had no luck.  For most of my attempts I can compile
> binutils fine but gcc compilation fails saying it cannot file system
> headers in /my/root/usr/include.. Am I missing a step somewhere?  I've
> even tried the bringing in eglibc/libc into the mix and trying to create
> a cross-compiler from linux x86 to linux x86 but that was even worse.
>
> From the googling that I've done it doesn't seem like it's that
> difficult.  I think I'm missing some critical step somewhere

Yes.  You have to pre-populate /my/root with an actual sysroot,
including system headers and a crt.  You can do this by rolling your
own, copying from /usr/, or any of a few other means.