gdb "unknown load command 0x32"

[platipodium (Carsten Lemmen)]

On a fresh MacPorts installation of gdb (and after code signing), I get on all executables on my system the following message

$> /opt/local/bin/gdb
(gdb) file /opt/local/bin/file
BFD: /opt/local/bin/file: unknown load command 0x32
BFD: /opt/local/bin/file: unknown load command 0x32
"/opt/local/bin/file": not in executable format: File format not recognized

[ryandesign (Ryan Carsten Schmidt)]

I guess that version of gdb is too old to analyze files compiled by whatever new version of clang you're using.

Have you considered using lldb instead of gdb?

[platipodium (Carsten Lemmen)]

OK, thanks. But many of the files (also those compiled outside of ports) where compiled with gcc-8.2, even those give the same error. I will try lldb for debugging.

[jmroot (Joshua Root)]

Could you give any details about your system?

[kencu (Ken)]

our gdb is outdated (8.0.1), and the newer gdb 8.2.1 seems to support that load command, looking through the code in bfd.

[kencu (Ken)]

gdb built cleanly for me on 10.6.8, and installs without error. I'll push up a PR to run a build on the CI system, and if that goes through, we can update it.

[kencu (Ken)]

Carsten, after the update to gdb rolls down the pipeline, try updating to the latest version and see if that solves your issue. If so, we can close this ticket (and perhaps a bunch of other open gdb tickets I see in the pipeline).

[platipodium (Carsten Lemmen)]

Replying to jmroot:

Could you give any details about your system?

Sure, up to date Mac OX 10.14 system

Darwin Kernel Version 18.0.0: Wed Aug 22 20:13:40 PDT 2018; root:xnu-4903.201.2~1/RELEASE_X86_64MacBook-sugarglider:code lemmen
$ /usr/bin/clang --version
Apple LLVM version 10.0.0 (clang-1000.11.45.5)
Target: x86_64-apple-darwin18.0.0
Thread model: posix

[platipodium (Carsten Lemmen)]

Replying to ryandesign:

I guess that version of gdb is too old to analyze files compiled by whatever new version of clang you're using.

Have you considered using lldb instead of gdb?

I can confirm that lldb is working on my system

[zap150 (Jan Zapletal)]

I still get the same error with gdb 8.2.1 and Mojave. According to ​https://sourceware.org/bugzilla/show_bug.cgi?id=23728, a patch fixing this issue should be a part of gdb 8.3. Is it possible to update the version available via macports?

Jan

[saagarjha (Saagar Jha)]

In 0375c287829ea236d48db376c210bdbbc5bf1176/macports-ports (master):

gdb: Update to 8.3

Remove patch-gdb-aarch64-linux-tdep.c.diff because it's been merged in upstream.

Closes: #57864