Re: GNU Libtool 2.4 released [stable]

[Alon Bar-Lev]

> New in 2.4 2010-09-22:
>
>        • New features:
> - Sysroot support. This allows you to build cross-compiled packages
> with the same prefix that will be used on the destination machine,
> and still find dependent libraries under the compiler's "sysroot".
> Without sysroot support, paths internal to the build system may leak
> into the product of the build.
>
> Sysroot support is disabled unless the --with-sysroot configure
> option is passed to configure, because .la files generated with
> sysroot support will not be usable in general with older Libtools.

This is great news!
Can you please explain how this feature works?
I see '=' is added to the prefix of .la files.
This suggests *ALL* packages compiled into sysroot must be migrated to
libtool 2.4.
Also, why not take the value of the sysroot from the DESTDIR automake variable?

Thanks,
Alon.