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undefined references during Make test with MinGW #7

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@staalmannen

Hi.

I have packaged lkl for Arch linux AUR
https://aur.archlinux.org/packages/lkl-linux-git/

and I was now going to package the MinGW cross-compiled version too:
https://aur.archlinux.org/packages/mingw-w64-lkl-linux-git/

This one does however fail during Make test:

[....]
i686-w64-mingw32-ar -rc lib/liblkl.a lib/iomem.o lib/utils.o lib/virtio.o lib/virtio_blk.o lib/fs.o lib/nt-host.o lib/lkl.o
i686-w64-mingw32-gcc -o tests/boot tests/boot.o lib/liblkl.a 
lib/liblkl.a(lkl.o): In function `timekeeping_init':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/time/timekeeping.c:1240: undefined reference to `clocksource_default_clock'
lib/liblkl.a(lkl.o): In function `clocksource_done_booting':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/time/clocksource.c:623: undefined reference to `clocksource_default_clock'
lib/liblkl.a(lkl.o): In function `alloc_large_system_hash':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/mm/page_alloc.c:6506: undefined reference to `__div64_32'
lib/liblkl.a(lkl.o): In function `mm_release':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/fork.c:892: undefined reference to `sys_futex'
lib/liblkl.a(lkl.o): In function `print_worker_info':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/workqueue.c:4148: undefined reference to `probe_kernel_read'
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/workqueue.c:4149: undefined reference to `probe_kernel_read'
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/workqueue.c:4150: undefined reference to `probe_kernel_read'
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/workqueue.c:4151: undefined reference to `probe_kernel_read'
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/workqueue.c:4154: undefined reference to `probe_kernel_read'
lib/liblkl.a(lkl.o):/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/workqueue.c:4156: more undefined references to `probe_kernel_read' follow
lib/liblkl.a(lkl.o): In function `register_die_notifier':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/notifier.c:555: undefined reference to `vmalloc_sync_all'
lib/liblkl.a(lkl.o): In function `init_idle':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/sched/core.c:4942: undefined reference to `sched_clock'
lib/liblkl.a(lkl.o): In function `sched_clock_cpu':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/sched/clock.c:406: undefined reference to `sched_clock'
lib/liblkl.a(lkl.o): In function `cpu_clock':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/sched/clock.c:411: undefined reference to `sched_clock'
lib/liblkl.a(lkl.o): In function `local_clock':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/sched/clock.c:416: undefined reference to `sched_clock'
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/sched/clock.c:416: undefined reference to `sched_clock'
lib/liblkl.a(lkl.o): In function `div_u64_rem':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/include/linux/math64.h:66: undefined reference to `__div64_32'
lib/liblkl.a(lkl.o): In function `ktime_divns':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/include/linux/ktime.h:181: undefined reference to `__div64_32'
lib/liblkl.a(lkl.o): In function `nsec_low':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/sched/debug.c:56: undefined reference to `__div64_32'
lib/liblkl.a(lkl.o): In function `nsec_high':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/sched/debug.c:46: undefined reference to `__div64_32'
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/sched/debug.c:43: undefined reference to `__div64_32'
lib/liblkl.a(lkl.o): In function `sched_debug_header':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/sched/debug.c:354: undefined reference to `sched_clock'
lib/liblkl.a(lkl.o): In function `print_time':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/printk/printk.c:1043: undefined reference to `__div64_32'
lib/liblkl.a(lkl.o): In function `msg_print_ext_header':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/printk/printk.c:534: undefined reference to `__div64_32'
lib/liblkl.a(lkl.o): In function `div_u64_rem':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/include/linux/math64.h:66: undefined reference to `__div64_32'
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/include/linux/math64.h:66: undefined reference to `__div64_32'
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/include/linux/math64.h:66: undefined reference to `__div64_32'
lib/liblkl.a(lkl.o):/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/include/linux/math64.h:66: more undefined references to `__div64_32' follow
lib/liblkl.a(lkl.o): In function `panic':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/panic.c:101: undefined reference to `bust_spinlocks'
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/kernel/panic.c:148: undefined reference to `bust_spinlocks'
lib/liblkl.a(lkl.o): In function `_setup_per_zone_wmarks':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/mm/page_alloc.c:6181: undefined reference to `__div64_32'
lib/liblkl.a(lkl.o): In function `_wb_calc_thresh':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/mm/page-writeback.c:739: undefined reference to `__div64_32'
lib/liblkl.a(lkl.o): In function `wb_update_write_bandwidth':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/mm/page-writeback.c:1064: undefined reference to `__div64_32'
lib/liblkl.a(lkl.o): In function `div_u64_rem':
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/include/linux/math64.h:66: undefined reference to `__div64_32'
/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/include/linux/math64.h:66: undefined reference to `__div64_32'
lib/liblkl.a(lkl.o):/home/jens/Devel/Arch/AUR-build/lkl-mingw/src/linux/include/linux/math64.h:66: more undefined references to `__div64_32' follow
collect2: error: ld returned 1 exit status
Makefile:47: recipe for target 'tests/boot' failed
make: *** [tests/boot] Error 1
[....]

Is there a library that I explicitly need to link?

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