On Sat, Sep 25, 2021 at 06:52:11PM +0200, Omar Polo wrote:
> However, I don't see any -Wl,-rpath,... when compiling got, neither on
> OpenBSD nor on linux.

It's something we'd ned to add to LDFLAGS.

> I was even thinking of trying to parse the elf header.  On linux I
> should find the current executable on /proc/self/exec, and from there
> with helps from elf.h I should be able to understand if it's a static
> executable or where are the needed libs.  It could help when/if got and
> the libexec helpers ends up being linked to different libraries.  I
> never did something like that but seems fun :)

You could do, although there's probably no point as it's doable at runtime
anyway.

> Anyway, I don't know much of how linking works, so I have no idea of how
> what I'll find in the elf header plays with rpath, LD_LIBRARY_PATH
> and/or LD_PRELOAD.

They're separate.

> slightly OT, but if you find how to obtain a working linux/landlock.h
> header on arch/void/alpine I'd be interested.  Those distro ship linux
> 5.14+ now, but their linux-headers package doesn't contain that header,
> only /something/something/uapi/linux/landlock.h which can't be included
> from the quick tests I did.
> 
> fedora has a linux/landlock.h header.  I don't know about other distros.

I'm on Arch here and Debian elsewhere and none of the recent kernel versions
at 5.14+ have a landlock.h file.  I've sent an email to a few folks who might
be able to help with this.

Kindly,
Thomas