Re: problems solved by AC_LIB_HAVE_LINKFLAGS [was: cross building 1.9.14 for mingw]

[Ralf Wildenhues]

Hello,

* Jan Nieuwenhuizen wrote on Sun, Mar 20, 2011 at 09:08:20AM CET:
> It would be nicer still if looking in /usr at compile/build time could
> be turned off (from your use cases that seems to be possible), or
> be turned off for $DESTDIR builds.  That could be done with a single
> flag.  It would be perfect if we found a way to detect $DESTDIR
> builds automagically, so that the --with/--without $DESTDIR option
> would have a smart default.

Bruno already explained why it is not a good idea to let DESTDIR
be the indicator of whether to look in /usr or not.

But I agree with you that there *should* be a common indicator to turn
off looking in /usr.  I think it should be a generalization of the
recent --with-sysroot addition to Libtool (which stems from the much
older sysroot support in GCC).  Implementors please talk to Paolo
Bonzini about further ideas for this.

Thanks,
Ralf