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Re: [Qemu-devel] [PATCH] host-pcc: enable building with -m32 or -m64


From: Andreas Färber
Subject: Re: [Qemu-devel] [PATCH] host-pcc: enable building with -m32 or -m64
Date: Thu, 26 May 2011 23:24:13 +0200

Am 26.05.2011 um 22:31 schrieb Stefan Berger:

On 05/26/2011 04:20 PM, Andreas Färber wrote:
Am 26.05.2011 um 21:00 schrieb Stefan Berger:

With the below patch I can build either ppc (-m32) or ppc64 (-m64) versions of Qemu (on a ppc64 host) when passing these compiler flags via 'configure ... --extra-cflags="-m32"'.

You probably meant "without passing"?

Nack. Please don't hardcode -mXX in configure, it's -arch ppc vs. - arch ppc64 on my host/gcc. What's wrong with passing --extra-cflags?

I posted the following patch today for compiling libcacard with -m32 on a 64 bit machine.

http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg02909.html

It adds LDFLAGS. This works fine on x86-64. Then trying this out on ppc64 with -m32 in extra-cflags I find the following in config- host.mak

[...]
HELPER_CFLAGS=
LDFLAGS=-Wl,--warn-common -g
ARLIBS_BEGIN=
[...]

The -m32 doesn't make it into LDFLAGS. The below patch fixed it for me following the pattern of x86-64 and i686 a bit further up in the case statement in configure.

Erm, you did try --extra-ldflags for LDFLAGS, did you? That --extra- cflags doesn't end up there is intentional!

Andreas


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