[Swan-dev] Bug#854094: libreswan FTBFS on x32 due to missing <sys/time.h>

[Daniel Schepler]

On Fri, Feb 3, 2017 at 5:32 PM, Daniel Kahn Gillmor
<dkg at fifthhorseman.net> wrote:
> hm, i don't think we want it to build for amd64 if we're doing native
> builds on x32, right?
>
> In mk/userland-cflags.mk, we have:
>
> ifeq ($(origin GCCM),undefined)
> ifeq ($(ARCH),i686)
> GCCM=-m32
> endif
> ifeq ($(ARCH),x86_64)
> GCCM=-m64
> endif
> endif
> USERLAND_CFLAGS+=$(GCCM)
>
> is ARCH defined as x86_64 for x32?  If so, is there a preferred way that
> libreswan should make this distinction?  or should i just manually set

I'm not sure exactly where ARCH comes from - but one difference you
could use is that the GNU triplet for x32 is x86_64-linux-gnux32, as
opposed to x86_64-linux-gnu for amd64.

> GCCM to -m32 in debian/rules when building for x32?

The flag would be -mx32 (-m32 would try to cross-build for i386 and
run into the same issue).  Either that, or just drop the
-m64/-m32/-mx32 flag altogether for Debian builds as it's not really
necessary anyway.
-- 
Daniel Schepler