Re: loading of module's dependencies broken with '-z now' in LDFLAGS

[Peter Stephenson <p.stephenson@xxxxxxxxxxx>]

On Thu, 5 Nov 2015 11:58:29 +0000
Peter Stephenson <p.stephenson@xxxxxxxxxxx> wrote:
> I guess we need to generate something like LINKMODS_whatever that
> tells it to link against the .so's as libraries?

Hmm... actually, maybe it's not that simple.

The usually implication with a DLL is that it'll be found automatically
by the OS, but that's not what zsh is doing, which is:

- get instruction to load zsh/zftp
- Open this with dlopen().  Note we have RTLD_LAZY defined to
  support the following.
- Run setup_().
- This executes
    return (require_module("zsh/net/tcp", NULL) == 1);
- This causes us to load tcp.so.
- When we enounter any missing link from tcp.so, it gets resolved.

I don't know enough about DLLs to say whether resolving the links when
zftp.so is created means that dlopen() now expects to be able to load
tcp.so itself, in which case it's going to be problematic.

I'd suspect the "-z now" business isn't really designed for use with
the dlopen RTLD_LAZY flag?

pws