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To: NightStrike <nightstrike@gmail.com>
Cc: gcc-help <gcc-help@gcc.gnu.org>
Subject: Re: top-level configure options, --help
References: <b609cb3b0712291247v6e18cce0rcff42dcd21cb4cde@mail.gmail.com>
From: Ian Lance Taylor <iant@google.com>
Date: Fri, 04 Jan 2008 02:18:00 -0000
In-Reply-To: <b609cb3b0712291247v6e18cce0rcff42dcd21cb4cde@mail.gmail.com>
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NightStrike <nightstrike@gmail.com> writes:

> I noticed that --with-sysroot is not listed in --help for the top
> level configure, but --with-build-sysroot is.  Is that on purpose?
> Should the former not be used at all in place of the latter?

This is an unfortunate artifact of autoconf --help handling with
recursive configure scripts.  You'll see both mentioned in the output
of gcc/configure --help.  --with-build-sysroot needs to be handled at
the top level in order to pass down the --sysroot option when
compiling libraries; therefore, it appears in the top level --help
output.  --with-sysroot does not need to be handled at the top level;
therefore, it does not appear in the top level --help output.

Ian