[openbeos] Re: cross building

----- Original Message -----
From: "Michael Noisternig" <michael.noisternig@xxxxxxxxx>
To: <openbeos@xxxxxxxxxxxxx>
Sent: Monday, March 31, 2003 4:23 PM
Subject: [openbeos] Re: cross building


> Building the kernel from Linux/Unix should not be too hard. Building the
> kernel from Windows can be a lot trickier, dependent on which way you go.
> The first step is to install an environment for cross-compilation from
> Windows -> Linux. There the easy way is to install Cygwin, a complete
> Unix environment for Windows, and build everything from there.

Buiding from cygwin probably is not more easy than building from DJGPP.
I do have Cygwin BTW.
It is pretty usefull at times (when you need a decent telnet, or a decent
cvs), but its libraries are a mess.
No other program gives me 'Library X not found' errors that often.
My cvs stopped working when I recently updated it.

> The harder way is the DJGPP way, in which case you must first compile
> GCC as a cross-compiler from DJGPP -> Linux/ELF yourself, including
> BinUtils for ELF output.

No, Gcc outputs assembler, Only binutils needs to be recompiled.
Recompiling gcc is pretty bad (ever tried to compile gcc3.2.x with
gcc2.7.3.4? its impossible)
binutils is a lot easier fortunately.

> This is really tricky because the DJGPP build
> is broken, so you must fix this yourself. Once you have managed this,
> you need to download the various unix shell tools from the djgpp site
> and you're ready to compile. Make sure you have the necessary
> environment variables (e.g. HOSTTYPE) set before.
> The second step is to get Jam working. The problem there is the command
> line length limit of Windows. I'm not sure if it is long enough in the
> NT series but it definitely is not in Windows 95/98. One solution for
> this is to modify the Jam sources so the input doesn't get fed to
> command.com or cmd.exe but to the Unix shell tool sh.exe.

That's 2 minutes of work.

> One last problem left to mention... there are some file name clashes in
> Windows, so you must also fix these, e.g. by renaming/removing the
> conflicting files in headers/os/support.

There is only one way to find that out....

I think I'll try it.
You'll hear the results as soon as I fixed my cvs........

> Hope that helps,
> Michael Noisternig
>
> Leon Timmermans wrote:
> >  From which OS's, other than BeOS can we build?
> > Linux? *BSD?
> > Are modifications to gcc/ld required for that?
> > Has anyone tried to build from Windows?
> > DJGPP can make ELF I'm told, but I never tried this.
> >
> > Leon Timmermans
>
>
>
>

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