[PATCH] detect overridden install prefix [BZ #18512]

[Carlos O'Donell]

On 06/11/2015 07:46 PM, Martin Sebor wrote:
> Attempting to install glibc configured with --prefix=/usr into
> a non-standard directory specified by the prefix make variable
> fails with an error.  Carlos indicated this is an unsupported
> use case that he would prefer to detect and error out on early
> in the installation process.
> 
> Attached is a simple patch that implements this detection. The
> patch also updates the INSTALL file to mention this caveat and
> recommend using DESTDIR instead.  To keep the patch simple
> I didn't implement the idea of detecting whether the overridden
> prefix is actually different than the prefix the library was
> configured with.
> 
> ChangeLog:
> 
> 2015-06-11  Martin Sebor  <msebor@redhat.com>
> 
>     [BZ #18512]
>     * Makerules (check-install-supported): New target.
>     install: Add check-install-supported as a dependency.
>     * INSTALL (Installing the C Library): Document that overriding
>     prefix and exec_prefix is not supported.  Mention DESTDIR.

The Makerules changes look good to me.

As Joseph notes INSTALL is a generated file.

OK to commit if you fix the INSTALL bit.

Cheers,
Carlos.