From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20044 invoked by alias); 20 Aug 2003 13:33:53 -0000 Mailing-List: contact gdb-help@sources.redhat.com; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sources.redhat.com Received: (qmail 20008 invoked from network); 20 Aug 2003 13:33:53 -0000 Received: from unknown (HELO nevyn.them.org) (66.93.172.17) by sources.redhat.com with SMTP; 20 Aug 2003 13:33:53 -0000 Received: from drow by nevyn.them.org with local (Exim 4.20 #1 (Debian)) id 19pT60-0002Lc-Jq; Wed, 20 Aug 2003 09:33:52 -0400 Date: Wed, 20 Aug 2003 13:33:00 -0000 From: Daniel Jacobowitz To: Chris.Pedley@arm.com Cc: gdb@sources.redhat.com Subject: Re: Cross Compiling GDB Message-ID: <20030820133352.GA8983@nevyn.them.org> Mail-Followup-To: Chris.Pedley@arm.com, gdb@sources.redhat.com References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.1i X-SW-Source: 2003-08/txt/msg00234.txt.bz2 On Wed, Aug 20, 2003 at 02:28:14PM +0100, Chris.Pedley@arm.com wrote: > > On 20/08/2003 14:05:30 gdb-owner wrote: > >On Wed, Aug 20, 2003 at 10:20:47AM +0100, Chris.Pedley@arm.com wrote: > >> I presume that the GDB at the following location isn't cygwin specific? > >> ftp.gnu.org/gnu/gdb/gdb-5.3.tar.gz > >> > >> However, if you look at line 53 in gdb-5.3/readline/configure.in then > >> it issues the error given above if cross compiling for a non-cygwin > >> target. > >> > >> Also my questions about build, host and target have been raised > >> because I'm unsure about the check for a cross compiler at line 123 > >> in gdb-5.3/configure.in. This checks whether the host and target > >> are the same thing, and only assumes it is a cross compiler if they > >> are different. Why isn't this actually checking build and host? > > > >Can you be a little clearer what you're trying to do? > > > >First of all, that seems like a really lame bug in readline. But it's > >easily fixable. But second, do you want a cross debugger or a native > >debugger for a non-cygwin host? $is_cross_compiler is whether the GCC > >being built will be a cross compiler - that configure script is shared > >with GDB. That's a host vs target issue. > > So is it definitely a bug, and is it definitely possible to cross compile > gdb > for other systems than cygwin? > > I'm trying to build a gdb debugger to be run on ARM Linux to debug apps > natively running under ARM Linux. I will be building gdb using the > arm-linux-gcc cross compiler on an Intel box, so was trying to configure > with: > target=arm-linux > build=i386-linux > host=arm-linux > with-headers=/linux-2.4.19/include > > This will fail because it will report that with-headers is only supported > when cross compiling. I'm muddled as to what target, build and host > therefore actually are? Well, --with-headers is only supported when _building a cross compiler_. You don't need to specify it. Assuming arm-linux-gcc is built correctly it already knows where the headers are. (Also, as a note, when building a cross compiler the kernel headers aren't what you want. It usually needs glibc headers too.) The readline error message is not fatal. I needed to set... um... bash_cv_have_mbstate_t=yes in the environment, and that was it; the build worked. I've been meaning to fix readline but not had a chance. -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer