From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ricardo Wurmus <rekado@elephly.net>
Subject: libstdc++ for cross compilers
Date: Mon, 10 Apr 2017 15:24:58 +0200
Message-ID: <87o9w41jkl.fsf@elephly.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Return-path: <help-guix-bounces+gcggh-help-guix=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:33667)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <rekado@elephly.net>) id 1cxZJd-0005w5-61
	for help-guix@gnu.org; Mon, 10 Apr 2017 09:25:14 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <rekado@elephly.net>) id 1cxZJa-000741-0M
	for help-guix@gnu.org; Mon, 10 Apr 2017 09:25:09 -0400
Received: from sender-of-o51.zoho.com ([135.84.80.216]:21113)
	by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32)
	(Exim 4.71) (envelope-from <rekado@elephly.net>) id 1cxZJZ-00073b-Oz
	for help-guix@gnu.org; Mon, 10 Apr 2017 09:25:05 -0400
List-Id: <help-guix.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/help-guix>,
	<mailto:help-guix-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/help-guix/>
List-Post: <mailto:help-guix@gnu.org>
List-Help: <mailto:help-guix-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/help-guix>,
	<mailto:help-guix-request@gnu.org?subject=subscribe>
Errors-To: help-guix-bounces+gcggh-help-guix=m.gmane.org@gnu.org
Sender: "Help-Guix" <help-guix-bounces+gcggh-help-guix=m.gmane.org@gnu.org>
To: help-guix <help-guix@gnu.org>

Hi Guix,

I’m trying to update my custom package for the Axoloti audio board,
which is not yet in Guix because it depends on bundled Java jars.  The
package includes a user interface written in Java and a cross-compiled
firmware for the board.

The latest version includes C++ sources for the firmware.
Unfortunately, our “arm-none-eabi” cross-compiler package does not
build libstdc++, nor does it come with any of the required C++ headers
like “cmath”.

So I tried to change our “arm-none-eabi” cross-compiler packages to also
build and install libstdc++ but failed in a multitude of ways.  The end
result is always that either the compiler fails to build (e.g. when
enabling libstdc++ via configure flags) or that the compiler fails to
find the header files that are included via “#include_next” directives
(e.g. when building libstdc++ as a separate package).

Could someone with GCC experience give me a hint despite my vague
problem description?

--
Ricardo

GPG: BCA6 89B6 3655 3801 C3C6  2150 197A 5888 235F ACAC
https://elephly.net