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Re: RFA/RFC: Pass --cache-file=/dev/null on to subconfigures

From: Nick Clifton <nickc at redhat dot com>
To: Ralf Wildenhues <Ralf dot Wildenhues at gmx dot de>, Charles Wilson <cygwin at cwilson dot fastmail dot fm>, Nick Clifton <nickc at redhat dot com>, gcc-patches at gcc dot gnu dot org, gdb-patches at sourceware dot org, binutils at sourceware dot org
Date: Fri, 25 Sep 2009 20:30:58 +0100
Subject: Re: RFA/RFC: Pass --cache-file=/dev/null on to subconfigures
References: <20090925172108.GA1808@gmx.de>

Hi Ralf,

Please do commit it, since I guess it is necessary in practice.

Done.

However, this necessity is always a sign of a bug in the GCC/src
build system.

True.

Well, with upstream Autoconf, you only ever have one cache file anyway,
so it works there.

Really ? I did not realise that.

GCC/src could easily let such a switch cause the
use of different cache file names in the sub-directories.  I'm not sure
what the benefit would be, though.

Nor do I. It was more of a theoretical situation than anything I might actually expect to happen in real life.

Cheers
  Nick

References:
- Re: RFA/RFC: Pass --cache-file=/dev/null on to subconfigures
  - From: Ralf Wildenhues

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