From mboxrd@z Thu Jan 1 00:00:00 1970 From: Markos Chandras Subject: Re: [PATCH] Documentation: ptp: Fix build failure on MIPS cross builds Date: Tue, 21 Oct 2014 13:11:22 +0100 Message-ID: <54464D6A.5000501@imgtec.com> References: <1413794538-28465-1-git-send-email-markos.chandras@imgtec.com> <20141021110724.GA16479@netboy> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Cc: , Jonathan Corbet , , , To: Richard Cochran Return-path: Received: from mailapp01.imgtec.com ([195.59.15.196]:46801 "EHLO mailapp01.imgtec.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932273AbaJUML1 (ORCPT ); Tue, 21 Oct 2014 08:11:27 -0400 In-Reply-To: <20141021110724.GA16479@netboy> Sender: netdev-owner@vger.kernel.org List-ID: On 10/21/2014 12:07 PM, Richard Cochran wrote: > On Mon, Oct 20, 2014 at 09:42:18AM +0100, Markos Chandras wrote: >> diff --git a/Documentation/ptp/Makefile b/Documentation/ptp/Makefile >> index 293d6c09a11f..397c1cd2eda7 100644 >> --- a/Documentation/ptp/Makefile >> +++ b/Documentation/ptp/Makefile >> @@ -1,5 +1,15 @@ >> # List of programs to build >> +ifndef CROSS_COMPILE >> hostprogs-y := testptp >> +else >> +# MIPS system calls are defined based on the -mabi that is passed >> +# to the toolchain which may or may not be a valid option >> +# for the host toolchain. So disable testptp if target architecture >> +# is MIPS but the host isn't. >> +ifndef CONFIG_MIPS >> +hostprogs-y := testptp >> +endif >> +endif > > It seems like a shame to simply give up and not compile this at all. > Is there no way to correctly cross compile this for MIPS? > > Thanks, > Richard > As far as I can see you don't cross-compile the file. You use the host toolchain. There is no clean way to build it for host if you have your kernel configured for MIPS. Perhaps maybe you could define __MIPS_SIM_{ABI64, ABI32, NABI32} in the gcc command line (-D...) but this is a bit ugly. Or maybe use the host headers instead of the ones in the kernel source. -- markos