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Re: [PATCH] Don't install .la files when --no-la-files is used


From: Russ Allbery
Subject: Re: [PATCH] Don't install .la files when --no-la-files is used
Date: Sat, 08 Nov 2008 17:03:08 -0800
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux)

Bob Friesenhahn <address@hidden> writes:

> Quite a lot can known from .la files but it is apparent that .la files
> are now spontaneously deleted.

Hm, I must admit that I generally find them useless compared to reading
readelf -a output, but I'm not the normal user.  :)

> It is really quite a burden on the developer to try to understand what
> is needed for static and shared linking.  Many Linux application/library
> authors are not even aware of all the libraries they are using and it
> might not be possible to fully know without using diagnostic tools,
> special environment variables like LD_BIND_NOW, or a particular
> execution mode of the software. Dependencies are not always obvious and
> is is possible for "pass through" dependencies to be introduced
> (stealthy hard dependencies) that the developer is not aware of.

This is all true in the general case, but most of the cases where clients
of a library need to link against that library's dependencies are weird
edge cases.  My guess is that only linking with the libraries whose ABIs
you call directly works 95% of the time on modern ELF platforms, and
linking with -pthread where appropriate is the only additional bit
required in another 4% or more of the cases.

-- 
Russ Allbery (address@hidden)             <http://www.eyrie.org/~eagle/>




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