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Re: Running into cross-compilation issues with libtool (and autoconf) wi

From: Tim Mooney
Subject: Re: Running into cross-compilation issues with libtool (and autoconf) with libusb-0.1.12
Date: Tue, 3 Nov 2009 17:03:35 -0600 (CST)

In regard to: Re: Running into cross-compilation issues with libtool (and...:

On 10/30/2009 01:53 PM, Nick Bowler wrote:
On 13:19 Fri 30 Oct     , Philip A. Prindeville wrote:
The problem is that this is an early linkage on the build host, where
the eventual DESTDIR hasn't yet been specified, but the resultant ends up looking like:

I suspect that you have two libtool libraries in the same source tree,
with one linked against the other.  Chances are, the compiled binaries
in the .libs directory are perfectly fine, and libtool is destroying
them when you run 'make DESTDIR=/path/to/staging/dir install'.

So we have and, libbar links with libfoo and.
Furthermore, you have a version of libfoo already installed on the host
system, in /usr/lib.  You cross-compile the package, using
--prefix=/usr/lib (since that is where it will finally end up).

Then you do 'make DESTDIR=/path/to/staging/dir install', and libtool
decides to re-link the libraries against the libraries in the final
installed location.  In this case, it is /usr/lib.  The problem is that
the libfoo in /usr/lib is the wrong one, since the cross-compiled libfoo
never got installed there!

The workaround here is to manually copy the libraries from .libs into
your staging directory.  IMHO the fix is to make libtool not re-link
anything if DESTDIR is set -- correct me if I'm wrong, but it seems to
me that the current behaviour cannot possibly be correct on any
platform, even on the ones that require re-linking.

That sounds about right, actually.

Nick *is* right, at least about the scenario that triggers the problem.
I've observed this behavior and asked about it on the list in the past.
I run into this problem on a regular basis when building software for
packaging on Solaris (not cross-compiling, just installing into DESTDIR
for packaging).

I'm not certain if skipping the relink if DESTDIR is being used is the right
fix for all platforms.  My guess was that libtool's -inst-prefix-dir
option needs to be augmented so that it correctly re-links against the
library that it just installed in DESTDIR even though the .la file it
will generate should *not* include the DESTDIR part of any paths (it
should have the final destination, not the temporary area used for

This problem has been with libtool since the -inst-prefix-dir option was
added, which I believe happened early in the 1.5.x series.

Tim Mooney                                  address@hidden
Enterprise Computing & Infrastructure       701-231-1076 (Voice)
Room 242-J6, IACC Building                  701-231-8541 (Fax)
North Dakota State University, Fargo, ND 58105-5164

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