cross-compile GDB ?

cross-compile GDB ?

[Joel Brobecker]

Hello,

I was wondering if anyone had tried cross-compiling GDB. My goal
is to build gdbserver for LynxOS 3 from a sparc-solaris machine.
Adding native support for LynxOS could take a while, but I think
that adding LynxOS support to the gdbserver would allow me to use
my version of GDB server. The one that they distribute with LynxOS 3
is too old and doesn't work well with newer versions of GDB (I think).

Is that possible at all? Right now, libiberty complains because it
is trying to test the compiler on the host by trying to run a small
test executable. It suggests to use the --host switch, but doing that
didn't help.

Thanks,
-- 
Joel

Re: cross-compile GDB ?

[Paul Koning]

>>>>> "Joel" == Joel Brobecker <brobecker@adacore.com> writes:

 Joel> Hello, I was wondering if anyone had tried cross-compiling
 Joel> GDB. My goal is to build gdbserver for LynxOS 3 from a
 Joel> sparc-solaris machine.  Adding native support for LynxOS could
 Joel> take a while, but I think that adding LynxOS support to the
 Joel> gdbserver would allow me to use my version of GDB server. The
 Joel> one that they distribute with LynxOS 3 is too old and doesn't
 Joel> work well with newer versions of GDB (I think).

 Joel> Is that possible at all? Right now, libiberty complains because
 Joel> it is trying to test the compiler on the host by trying to run
 Joel> a small test executable. It suggests to use the --host switch,
 Joel> but doing that didn't help.

It works for me; we routinely build gdb (including gdbserver) for a
mips target on an i386 host.  The switches are --host=<mipstarget>
--target=<mipstarget> --build=<i386host>.  And of course you need a
toolchain (compiler etc) for the target.

I may have had to pass CC=<targetcompilername> as well, I'm not sure
if that's needed.

   paul

Re: cross-compile GDB ?

[DJ Delorie]

The thing with libiberty can be solved by adding a lynxos-specific
clause in libiberty's configury that tells it which library functions
lynxos has, much like we already have for newlib, cygwin, and djgpp.

Re: cross-compile GDB ?

[Joel Brobecker]

> It works for me; we routinely build gdb (including gdbserver) for a
> mips target on an i386 host.  The switches are --host=<mipstarget>
> --target=<mipstarget> --build=<i386host>.  And of course you need a
> toolchain (compiler etc) for the target.

Aha, I completely forgot about the --build switch... That gets me past
this first hurdle. Thanks!

-- 
Joel

Re: cross-compile GDB ?

[Stan Shebs]

Joel Brobecker wrote:
> Hello,
>
> I was wondering if anyone had tried cross-compiling GDB. My goal
> is to build gdbserver for LynxOS 3 from a sparc-solaris machine.
> Adding native support for LynxOS could take a while, but I think
> that adding LynxOS support to the gdbserver would allow me to use
> my version of GDB server. The one that they distribute with LynxOS 3
> is too old and doesn't work well with newer versions of GDB (I think).
>   
Ironically, Stu Grossman wrote gdbserver for Lynx originally - you can 
retrace a bit of the history in ChangeLog-1993.

Stan