Bug 27375

Also note that there are two new location operations DW_OP_addrx and DW_OP_constx that can reference the .debug_addr section index.

https://sourceware.org/pipermail/dwz/2021q1/000930.html contains a patch for this issue.

and my bug https://sourceware.org/bugzilla/show_bug.cgi?id=28985 is duplicate of this one.

*** Bug 28985 has been marked as a duplicate of this bug. ***

(In reply to Gianfranco from comment #2)
> https://sourceware.org/pipermail/dwz/2021q1/000930.html contains a patch for
> this issue.

Note that patch has been integrated and is in release but doesn't handle .debug_addr.

There is a patch that does here:
https://inbox.sourceware.org/dwz/CH0PR12MB52659E9758818EBFDFE85EA8962E9@CH0PR12MB5265.namprd12.prod.outlook.com/

Hello,

I hope I'm not bothering you too much, but I wanted to ask what the current status is? I would like to try building a Debian package with clang, but this doesn't seem to work due to this error:
```
Installing /woodpecker/src/codeberg.org/********/mping-sender/systemd/mping-sender.service to /woodpecker/src/codeberg.org/********/mping-sender/debian/mping-sender/usr/lib/systemd/system
Installing /woodpecker/src/codeberg.org/********/mping-sender/systemd/mping-sender to /woodpecker/src/codeberg.org/********/mping-sender/debian/mping-sender/etc/default
Installing /woodpecker/src/codeberg.org/********/mping-sender/apparmor/usr.bin.mping-sender to /woodpecker/src/codeberg.org/********/mping-sender/debian/mping-sender/etc/apparmor.d
make[2]: Leaving directory '/woodpecker/src/codeberg.org/********/mping-sender'
   dh_installdocs
   dh_installchangelogs
   dh_installsystemd
   dh_perl
   dh_link
   dh_strip_nondeterminism
   dh_compress
   dh_fixperms
   dh_missing
   dh_dwz -a
dwz: debian/mping-sender/usr/bin/mping-sender: Unknown debugging section .debug_addr
dh_dwz: error: dwz -- debian/mping-sender/usr/bin/mping-sender returned exit code 1
dh_dwz: error: Aborting due to earlier error
make[1]: *** [debian/rules:8: binary] Error 25
make[1]: Leaving directory '/woodpecker/src/codeberg.org/********/mping-sender'
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
make: *** [Makefile:34: debian] Error 2
```
CI: https://ci.codeberg.org/repos/15696/pipeline/58/3

As a workaround, I currently have the following in my meson.build:
```
if get_option('debug')
    # see https://sourceware.org/bugzilla/show_bug.cgi?id=27375
    add_project_arguments(cpp_compiler.get_supported_arguments(['-gdwarf-4']), language: 'cpp')
endif
```

(In reply to Marek Küthe from comment #5)
> I hope I'm not bothering you too much, but I wanted to ask what the current
> status is? I would like to try building a Debian package with clang, but
> this doesn't seem to work due to this error:

Sorry, there hasn't been much progress here even though it isn't too hard to support. The issue has been that the tests don't use binutils readelf but some other dwarf dump tool. I believe at the time binutils readelf also didn't handle .debug_addr. But it does now.

Note that this really shouldn't be a hard failure in the debian tooling. If dwz fails it just means it couldn't compress and didn't write out new debug data.