GDB 16.3: is it possible to cross-debug an x64 core from ARM?

[Tom Tromey]

>>>>> "Paul" == Paul Smith via Gdb <gdb@sourceware.org> writes:

Paul> But, if I try to build an aarch64 GDB (on an ARM system) that has
Paul> support for debugging x86_64 core files, the build fails like this:

Paul>   $ ../gdb-6.3/configure ... --enable-targets=x86_64-linux-gnu
Paul>     ...
Paul>   $ make -j$(nprocs)
Paul>     ...
Paul>   make[2]: *** No rule to make target '../sim/aarch64/libsim.a', needed by 'gdb'.  Stop.

Either the sim should be auto-disabled when it isn't available for the
port, or it should build and be linked in.  So one way or another this
is a bug.  Is the sim code built for you?

FWIW I normally use --enable-targets=all so I'm usually seeing all the
sims be built (though only one can be linked in).

A workaround for you would be to disable the sims, aka --disable-sim.
However it would be better to find out what's really gone wrong.

Tom