gdb failure on macOS Sierra

[caipre]

Ran into this problem today. Running gdb on a binary quits with message:

During startup program terminated with signal ?, Unknown signal.

This is an open bug in gdb upstream: https://sourceware.org/bugzilla/show_bug.cgi?id=20266
A workaround is to disable SIP, as discussed here: https://sourceware.org/ml/gdb/2016-10/msg00009.html

Should we add a message in the caveats section for Sierra users?

[MikeMcQuaid]

Does it not work with SIP at all? We won't recommend disabling SIP to end-users as it's a security feature.

[caipre]

In fact, the proposed workaround doesn't work for me (macOS Sierra 10.12.1 Beta). I tried csrutil enable --without debug, as suggested in the mailing list, as well as with SIP fully disabled. Same error in both cases.

Closing, as this seems like it has to be fixed by Apple or gdb upstream.

[Salamit]

This resolved the issue for me: http://stackoverflow.com/questions/39702871/gdb-kind-of-doesnt-work-on-macos-sierra/40437725#40437725

[imdanielsp]

@Salamit this is not solving the issue for me. I tried writing set startup-with-shell off to a .gdbinit located in my ~/ and it is not working. Any other ideas?

[Salamit]

If you followed instructions as in the video then I'm sorry, that is all I've got.