MSVC: Find potential libs regardless of case.

[Peter Rosin]

Hi!

Here's the next patch on the MSVC branch. I decided to merge in
a couple of things further ahead, no point in reviewing stuff
when an improvement is around the corner, right?

What I'm looking for is a go-ahead that this patch is ready for
master, but then delay pushing it until enough of the MSVC support
is reviewed and ready to make this patch relevant. I'm fine with
waiting with regression testing until just before pushing (as I
don't expect any regressions), so that we are not getting too
tired of regression testing and run out of steem.

So, this is basically

"On Windows, find potential libs regardless of file name case."
7350644a0a5f5922326cfebe073b1822ae028a9b
"Disable nocase handling for cross compiles."
5b9cabda803d10ba01b7b38e2731d4927e4c0024

and relevant parts of

"patch msvc-documentation.patch"
06cfce005204bb8ca212aadab38b38c0202ea04e

merged into one patch but with cygwin removed since I don't
really care about Cygwin+MSVC at this point and Eric Blake
and Chuck didn't want it. Minimum resistance etc...

Previous discussions of "this" patch:

http://lists.gnu.org/archive/html/libtool-patches/2008-08/msg00007.html
http://lists.gnu.org/archive/html/libtool-patches/2007-07/msg00039.html

Cheers,
Peter

2010-06-14  Peter Rosin  <address@hidden>

        On Windows, find potential libs regardless of file name case.
        * libltdl/m4/libtool.m4 (_LT_CHECK_MAGIC_METHOD),
        libltdl/config/ltmain.m4sh (func_mode_link): On Windows,
        find potential libs regardless of file name case.
        * tests/nocase.at: New test, to check for regressions
        of the above.
        * Makefile.am: Add above new test.
        * doc/libtool.texi (libtool script contents): Document
        new variables.

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