Re: [Bug 1885247] [NEW] Build error in Intel 32-bit hosts

[Thomas Huth <thuth@redhat.com>]

On 26/06/2020 11.13, Philippe Mathieu-Daudé wrote:
> On 6/26/20 9:37 AM, Aleksandar Markovic wrote:
>> пет, 26. јун 2020. у 09:11 Aleksandar Markovic
>> <1885247@bugs.launchpad.net> је написао/ла:
>>>
>>> Public bug reported:
>>>
>>> The code base is on master, checked out on Thursday June25th 2020,
>>> 0250c595c9d. The build procedure:
>>>
>>> $ mkdir build-gcc
>>> $ cd build-gcc
>>> $ ../configure
>>> $ make
>>>
>>> The build error message is:
>>>
>>>    CC      x86_64-softmmu/hw/hyperv/hyperv.o
>>>    CC      x86_64-softmmu/hw/hyperv/hyperv_testdev.o
>>>    CC      x86_64-softmmu/hw/hyperv/vmbus.o
>>> /home/rtrk/Build/qemu-master/hw/hyperv/vmbus.c: In function ‘gpadl_iter_io’:
>>> /home/rtrk/Build/qemu-master/hw/hyperv/vmbus.c:386:13: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
>>>           p = (void *)(((uintptr_t)iter->map & TARGET_PAGE_MASK) | off_in_page);
>>>               ^
>>> cc1: all warnings being treated as errors
>>> make[1]: *** [/home/rtrk/Build/qemu-master/rules.mak:69: hw/hyperv/vmbus.o] Error 1
>>> make: *** [Makefile:527: x86_64-softmmu/all] Error 2
> 
> FWIW there is no CI job covering x86 KVM on 32-bit host build.
> Should this be covered? I guess the problem is no CI services
> provide 32-bit x86...

You can certainly provide either a container, or install the 32-bit 
libraries in a 64-bit environment. Then run

PKG_CONFIG_LIBDIR=... ./configure --extra-cflags=-m32

and it should be possible to build 32-bit binaries, too.

Alternatively, we could add a cross-compilation job that builds with 
i686-w64-mingw32 in 32-bit.

  Thomas