On Fri, 2010-12-17 at 11:30 +0000, Andrew Stubbs wrote: > On 17/12/10 08:01, Amit Mahajan wrote: > > I want to build linaro-netboook filesystem from *sources*, as I need a > > filesystem build without VFP support. > > > > I checked the wiki and other links but could not find a related > > document. > > > > Can anyone please point me to directions on how to do the same? > > I don't know if there's an official way to do that, but here's what I > would do: > > 1. Find a board you can run the existing installation on. Cross building > packages is hard, so it'll be easier to bootstrap it this way. > > 2. On this board, download the compiler sources: > > apt-get source gcc > > 3. Tweak the compiler configuration flags in the debian directory so > that they set up the VFP as you want it, and build the compiler: > > sudo apt-get build-dep gcc > dpkg-buildpackage gcc*.dsc > > 4. Install the new gcc into the build board (I would recommend doing > this work in a chroot incase something goes wrong ...): > > dpkg ..... gcc*.dep > > 5. Squirrel away the newly built .deb files. > > 6. Repeat for all packages until you have no packages depending on VFP > in your system. Most won't require any reconfiguration, but you never > know. It's probably best to start with glibc, and then other libraries, > just to make sure the headers and configure tests are right. (Maybe > non-VFP kernel headers also, but you'll need to run a VFP-enabled kernel > until you're done rebuilding everything.) > > Your build file-system should now run on your netbook, although it'll be > chock full of -dev packages, so you might have to clean it up a bit. > > This should work because the default ARM EABI is the same whether you > use VFP, or not. If/when we choose to switch to the hard-fp EABI variant > (in theory, it's more efficient), then tricks like this will be more > difficult. > > Hope that helps > > Andrew
Hi Andrew, Thanks for your help. The procedure you mentioned looks good. But I have 2 points here: 1. Right now I do not have access to board. I think probably I can use QEMU for simulating my hardware. 2. Compiling each package individually will be a long process. I wonder if Ubuntu has something like ALIP (ARM linux internet platform), which can be readily used with scratchbox. -- Thanks Amit Mahajan _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
