cross compiling

[Russell Haley]

BUILD(7)	
...
     *buildenv*	      Spawn an interactive shell with environment variables
		      set up for cross-building	the system.  The target	archi-
		      tecture needs to be specified with make(1)
<https://www.freebsd.org/cgi/man.cgi?query=make&sektion=1&apropos=0&manpath=FreeBSD+10.2-RELEASE>
variables
		      *TARGET**_**ARCH* and *TARGET*.

OMG I've been looking for this for about a year now and it's been
right there. I even submitted a patch on this page!

Thanks guys!!! Please tell me this works?

Russ


On Fri, Dec 4, 2015 at 9:32 PM, Warner Losh <imp at bsdimp.com> wrote:

> On Fri, Dec 4, 2015 at 10:39 AM, Daniel Braniss <danny at cs.huji.ac.il>
> wrote:
>
> >
> > On 4 Dec 2015, at 6:33 PM, Warner Losh <imp at bsdimp.com> wrote:
> >
> >
> > On Dec 4, 2015, at 9:31 AM, Daniel Braniss <danny at cs.huji.ac.il> wrote:
> >
> > Hi,
> > I can cross compile for armv6 (raspberry Pi B), and I do get a working
> > version, and till about July, I was
> > able to cross compile a module doing something like this:
> > $ cd $SRC
> > $ make kernel-toolchain TARGET_ARCH=armv6
> > $ make buildenv TARGET_ARCH=armv6 BUILDENV_SHELL=/usr/local/bin/shell
> > $ cd <moduledir>
> > $ make
> >
> > but today, after a fresh svn update of current, I get:
> >
> > Warning: Object directory not changed from original
> > /a/fr-05/vol/home/system/danny/src/FreeBSD/ARM/elc/sys/modules/mfrc
> > cc  -O -pipe -mfloat-abi=softfp  -DMFRC_DEBUG=8 -Werror -D_KERNEL
> > -DKLD_MODULE -nostdinc
> >
> -I/a/fr-05/vol/home/system/danny/src/FreeBSD/ARM/elc/sys/modules/mfrc/../..
> > -I. -I@ -I@/contrib/altq -fno-common   -ffreestanding -c
> >
> /a/fr-05/vol/home/system/danny/src/FreeBSD/ARM/elc/sys/modules/mfrc/../../dev/mfrc/mfrc.c
> > -o mfrc.o
> > cc: error: argument unused during compilation: '-mfloat-abi=softfp'
> > *** Error code 1
> >
> > so, what magic am I missing?
> >
> >
> > What does which cc say?
> >
> > the host I use to cross compile is running 10.1,
> >
> > /usr/bin/cc
> >
> > but I also tried CC=clang
> > there is another error, which appeared before, and I solve it by setting
> > MK_FORMAT_EXTENSIONS=no
> > (which out it complains … malformed conditional (${MK_FORMAT_EXTENSIONS)
> > == “no”)
> >
> >
> If which cc returns /usr/bin/cc, then you  haven't built the toolchain.
>
> Warner
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