[PATCH] Allow the use of a listing file if the archiver supports it.

[Peter Rosin]

Hi!

This is a patch that makes use of @FILE support in the
archiver, if the archiver supports it. That makes linking
succeed for long command lines when using MSVC, as MSVC
can't do piecewise linking (-r -o) which is the current
fallback. Absolute paths still needs work, but that will
have to wait for Chucks work in that area.

This is similar to commit
f987bddc70eb8968923964bd0b98f530b3781add
Indicate if the archiver supports a listing file.

but generalized so that it tests for the feature instead of
only using @ when Microsoft lib is the archiver.

As usual I have squashed in the relevant part of the
msvc-doc commit
06cfce005204bb8ca212aadab38b38c0202ea04e


Discussion that led up to the above mentioned commit on the
pr-msvc-support branch:
http://lists.gnu.org/archive/html/libtool-patches/2006-02/msg00081.html

First post of the changeset on the pr-msvc-support branch:
http://lists.gnu.org/archive/html/libtool-patches/2007-07/msg00064.html

Cheers,
Peter

0001-Allow-the-use-of-a-listing-file-if-the-archiver-supp.patch.txt
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