compiling gcc on the DOC

[Rob Landley]

On Tuesday 12 June 2007 08:08:01 abhiram at ee.iitb.ac.in wrote:
> hello!!
> I have a 350MB diskonchip and i want linux on it. I used buildroot to
> produce a root filesystem which includes busybox and uclibc libraries.
> Buildroot also produces a gcc cross compiler. But i want a native compiler
> to run on my diskonchip. I tried to compile gcc-2.95.3 using --with-lib
> option using gcc from a knoppix cd i.e I booted from a knoppix CD, mounted
> the diskonchip and tried to compile and install gcc-2.95.3. But,
> apparently --with-lib option works only for cross compilers. If I dont
> include that option, gcc is compiled
> using the glibc of knoppix.

Which Disk on Chip are you using?

My firmware linux project (http://landley.net/code/firmware) builds a cross 
compiler and uses it to cross compile a minimal native build environment 
(which includes a native compiler), and then boots it under qemu.  The 
scripts are generic, the variation between platforms is all in 
sources/configs (one file per target platform).  Right now it does x86, 
x86-64, mips, mipsel, two arm variants (although they only boot with the 
2.6.20 kernel, not 2.6.21, due to a bad interaction between the 2.6.21 
kernel's arm scsi driver and qemu's emulated arm scsi card).  It also has 
configs for sparc and powerpc that don't work yet.

> I could use a pre-compiled development system which will give me a native
> compiler. But I want to compile it myself from the source(and hopefully
> learn something along the way :D). How do I compile gcc such that it is
> linked to the uclibc libraries on the diskonchip and not the glibc on the
> knoppix CD.

My thing's a bash script that does all the compilation from source.  I tried 
to make it easy to read. :)

Rob