[PATCH 2/N] LIBTOOLFLAGS, and *_LINK fixes for Automake 1.11

[Dave Korn]

Ralf Wildenhues wrote:
>> - LIBTOOLFLAGS, and *_LINK fixes for Automake 1.11 (GCC only)
> 
> Automake handling of per-target LDFLAGS rules changed which means
> that if you override *_LINK manually, you have to ensure that they
> are used, too.
> 
> Automake introduced $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS)
> (or per-target LIBTOOLFLAGS).  Add them where we manually override
> $(LINK).  Also, add $(LIBTOOLFLAGS) where we use $(LIBTOOL) in
> Makefile.in files not governed by automake.
> 
> When this patch is used with Automake 1.9.6, there is a small chance for
> problems: its rules may now cause duplicate expansion of some of the
> link flags.  If link flags duplication is a problem on some systems,
> then this can cause failures.  I haven't tested this much.
> 
> OK to apply?

    Hi Ralf,

  Is it possible that this patch is related to a problem I'm experiencing on
HEAD (r151124) where LTLDFLAGS in libstdc++-v3/src appears no longer to be
used in the final link of libstdc++.la?

  It used to be that LTLDFLAGS was included in CXXLINK, which was used in the
rule for linking libstdc++.la, but now that rule uses libstdc___la_LINK
instead.  Is it perhaps the case that both LTLDFLAGS and CXXLINK are now
obsolete in the v3 makefiles and don't need to be defined at all?

    cheers,
      DaveK