[linux-dvb] Re: New DVB driver release 1.0.0-pre1

[Holger Waechtler <holger@convergence.de>]

Emard wrote:
> On Mon, Feb 17, 2003 at 01:45:57PM +0100, Johannes Stezenbach wrote:
>
> > On Sat, Feb 15, 2003 at 03:37:08AM +0100, Ralph Metzler wrote:
> >
> > > Emard writes:
> > > > would be to start GPL firmware, maybe even bogus in the beginning but
> > > > people will exchange knowledge and soon it will be full functional.
> > >
> > > I did that almost 2 years ago. Nobody did anything with it.
> > I know someone who did.
> >
> >
> > > It is in CVS (or used to be and still is in the attic) at DVB/driver/av7110/gnufirm.
> > > It is a primitive skeleton for a firmware, about everything I could
> > > write without using proprietary information.
> > It's still in the NEWSTRUCT branch.
> >
> > The problem is that the RTSL is too large. You can get the demux
> > to work if you start writing a GPL firmware from scratch, but
> > the MPEG decoder is just too much, IMHO.
>
> Can someone recommend working (little-endian?) arm binutils+gcc 
> package for debian to try with the firmware? Emdebian arm utils 
> are big-endian, seems not useable for av7110
it's pretty easy to build cross compilers under Debian. Below a quoted 
mail from one of the Debian Maintainers describing how you can do this.

If you want to use the more generic approach you'll find plenty of 
cross-gcc-HOWTOs on the web.

Holger


----- Forwarded message -----

Subject: debian cross compile readme
Date: Mon, 20 Jan 2003 18:18:05 +0100

This package, toolchain-source, is used as a base package for all gcc 
cross-compiler packages in debian. It contains the source-code of GNU 
binutils and gcc. The cross-compiler packages Build-Depends on it to 
have access to this source code during build time, and their source 
packages only need a rules file that knows how to compile this code for 
their specific target and a few other control files. In order to make 
certain that the exact source code used to compile a specific binary 
package is available in any debian distribution (as the policy and GPL 
dictates) the Build-Depends has to be on an specific version of 
toolchain-source and thus be updated and recompiled every time 
toolchain-source is updated (see below). This package also contains two 
scripts, tpkg-make and tpkg-update, used to create and update the 
different cross-compiler packages. To create the source packages for any 
specific target simply use: apt-get install toolchain-source tpkg-make 
<target> This will create two unpacked source packages 
binutils-<target>-<ver> and gcc-<target>-<ver> in the current directory. 
These packages are ready to build, but you'll probably want to customize 
the options passed to configure and make in there debian/rules files. 
You have to build and install the binutils package before you can build 
the gcc package. If you are lucky and everything works as it's supposed 
the following commands will build and install the compiler (debi has to 
be run as root since it install the package): cd binutils-<target>-<ver> 
 debuild debi cd ../gcc-<target>-<ver>  debuild debi Quite a few of the 
targets needs bits of libc and associated stuff. This generally has to 
be solved by hand. But if there is a debian port for the target the 
compiled binary packages of this distribution can be used. Before they 
can be installed they have to be converted so that the the libs are 
placed in /usr/<target>/lib instead of /usr/lib (otherwise that native 
libs will be overwritten). This can be done with the dpkg-cross script 
(from the dpkg-cross package). Make sure that crossbase in 
/etc/dpkg/cross-compile is set to /usr/ (and not /usr/local/ which is 
default). Included in this package is a script, called tpkg-install-libc 
that will download convert and install libc6 and libc6-dev for any 
supported architecture: apt-get install dpkg-cross ... edit 
/etc/dpkg/cross-compile ... tpkg-install-libc <target> The current 
version of dh_shlibdeps (debhelper 3.0.8) don't like shard libs for 
architectures other than the native and will fail the build process. 
Here is a simple patch that will make dh_shlibdeps ignore those files. 
Hopefully this will be fixed in future versions. 72,73c72,73 < $ff=file 
"$file"; < if ($ff=~m/ELF/ && $ff!~/statically linked/) { ---

>>               $ff=ldd "$file";
>>               if ($ff !~ /not a dynamic executable/) {



When a new version of binutils or gcc is released upstream, the
toolchain-source will be updated. This means that all cross-compiler
packages have to be updated as well. To accomplish this we run the
tpkg-update script in the binutils-<target>-<ver> and
gcc-<target>-<ver> dirs. This will update the toolchain-source
dependency and add an appropriate changelog entry. Then the package
can be rebuilt with the new source code:

  apt-get install toolchain-source

  cd binutils-<target>-<ver>
  tpkg-update
  debuild
  debi

  cd ../gcc-<target>-<ver>
  tpkg-update
  debuild
  debi
--
Hakan Ardo <hakan@debian.org>, http://master.debian.org/~hakan/


----- End forwarded message -----




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